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WT41-E

DATA SHEET

Thursday, 02 October 2014

Version 1.4

VERSION HISTORY

Version

1.0

Comment

Release

1.1

Power vs supply voltage figure added

Typo corrections

1.2

1.3

Certification information updated

Absolute maximum supply voltage 3.7V

1.31

NCC certification info added. HCI30 removed from the ordering information

list.

1.32

1.33

1.34

1.4

NCC labeling info added in Chinese

Duplicate spurious emissions table removed

MSL information added

Silicon Labs

TABLE OF CONTENTS

1

2

3

Ordering Information......................................................................................................................................7

Pinout and Terminal Description ...................................................................................................................8

Electrical Characteristics ............................................................................................................................ 11

3.1

Absolute Maximum Ratings ................................................................................................................ 11

Recommended Operating Conditions................................................................................................. 11

PIO Current Sink and Source Capability............................................................................................. 11

Transmitter Performance For BDR ..................................................................................................... 12

3.2

3.3

3.4

3.4.1

Radiated Spurious Emissions...................................................................................................... 13

Receiver Performance ........................................................................................................................ 13

Current Consumption .......................................................................................................................... 14

Antenna Specification ......................................................................................................................... 15

3.5

3.6

3.7

4

5

6

Physical Dimensions .................................................................................................................................. 16

Layout Guidelines....................................................................................................................................... 18

UART Interface........................................................................................................................................... 19

6.1

UART Bypass...................................................................................................................................... 21

UART Configuration While Reset is Active ......................................................................................... 21

UART Bypass Mode............................................................................................................................ 21

6.2

6.3

7

USB Interface ............................................................................................................................................. 22

7.1

USB Data Connections ....................................................................................................................... 22

USB Pull-Up resistor ........................................................................................................................... 22

USB Power Supply.............................................................................................................................. 22

Self-Powered Mode............................................................................................................................. 22

Bus-Powered Mode............................................................................................................................. 23

USB Suspend Current......................................................................................................................... 24

USB Detach and Wake-Up Signaling.................................................................................................. 24

USB Driver .......................................................................................................................................... 25

USB v2.0 Compliance and Compatibility ............................................................................................ 25

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8

9

Serial Peripheral Interface (SPI)................................................................................................................. 26

PCM Codec Interface ................................................................................................................................. 27

9.1

PCM Interface Master/Slave ............................................................................................................... 27

Long Frame Sync................................................................................................................................ 28

Short Frame Sync ............................................................................................................................... 28

Multi-slot Operation ............................................................................................................................. 29

GCI Interface....................................................................................................................................... 29

Slots and Sample Formats.................................................................................................................. 30

Additional Features ............................................................................................................................. 31

PCM_CLK and PCM_SYNC Generation ............................................................................................ 31

9.2

9.3

9.4

9.5

9.6

9.7

9.8

Silicon Labs

9.9

10

10.1

11

11.1

12

PCM Configuration.............................................................................................................................. 32

I/O Parallel Ports..................................................................................................................................... 34

PIO Defaults................................................................................................................................. 34

Reset....................................................................................................................................................... 35

Pin States on Reset ..................................................................................................................... 36

Certifications ........................................................................................................................................... 37

Bluetooth...................................................................................................................................... 37

FCC and IC .................................................................................................................................. 37

12.1

12.2

12.2.1 FCC et IC ..................................................................................................................................... 39

12.3

CE ................................................................................................................................................ 41

MIC Japan.................................................................................................................................... 41

KCC (Korea)................................................................................................................................. 41

NCC Taiwan................................................................................................................................. 42

12.4

12.5

12.6

12.6.1 NCC Taiwan labeling requirements............................................................................................. 42

12.7

12.8

Qualified Antenna Types for WT41-E.......................................................................................... 42

Moisture Sensitivity Level (MSL).................................................................................................. 43

Contact Information ........................................................................................................................................... 44

Silicon Labs

1 Ordering Information

WT41-E-HCI

Firmware

HCI

HCI21= HCI firmware (Bluetooth 2.1 + EDR)

=

HCI firmware (Bluetooth 2.0 + EDR)

AI

=

iWRAP 2.2.0

iWRAP 3.0.0

iWRAP 4.0.0

Custom*

AI3

AI4

C

HW version

E

=

u.fl connector

Product series

Silicon Labs

Page 7 of 44

2 Pinout and Terminal Description

Pins 1 and 52 (GND)

are not connected

and have been

removed

51

RF

RFGND

2

3

4

5

6

7

50

GND

49

48

GND

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

GND

VDD_PA

PIO2

GND

AIO

UART_TX

PIO3

PIO5

UART_RTS

UART_RX

GND

USB+

USB-

UART_CTS

PCM_IN

PCM_CLK

PCM_SYNC

GND

SPI_MOSI

SPI_MISO

SPI_CLK

SPI_CSB

GND

PIO7

PIO6

RESET

VDD

GND

Figure 1: WT41-E pin out

NUMBER

PAD TYPE

DESCRIPTION

Pins 1 and 52 (GND) have been removed

from the module.

NC

1, 52

Not connected

Input, weak internal pull- Active low reset. Keep low for >5 ms

RESET

33

up

to cause a reset

2-10, 16,

23,24,26-

28, 30,

31,36,44-

49, 53-59

GND

RF

GND

RF output for WT41-N. For WT41-A

and WT41-E this pin is not connected

51

RF output

RF ground. Connected to GND internally to

the module.

Supply voltage for the RF power amplifier

and the low noise amplifier of the module

Supply voltage for BC4 and the flash

memory

RFGND

VDD_PA

VDD

50

11

32

GND

Supply voltage

Table 1: Supply and RF Terminal Descriptions

Silicon Labs

Page 8 of 44

NUMBER

PIO PORT

PAD TYPE

DESCRIPTION

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

PIO[2]

PIO[3]

PIO[4]

PIO[5]

PIO[6]

12

13

29

41

34

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

Bi-directional, programmamble

strength internal pull-down/pull-up line

Programmamble input/output

PIO[7]

AIO[1]

35

43

Programmamble analog

input/output line

Table 2: GPIO Terminal Descriptions

Bi-directional

PCM

INTERFACE

NUMBER

PAD TYPE

DESCRIPTION

CMOS output, tri-state,

weak internal pull-down

PCM_OUT

25

20

22

21

Synchronous data output

Synchronous data input

Synchronous data sync

Synchronous data clock

CMOS input, weak

internal pull-down

PCM_IN

Bi-directional, weak

internal pull-down

PCM_SYNC

PCM_CLK

Bi-directional, weak

internal pull-down

Table 3: PCM Terminal Descriptions

UART

Interfaces

NUMBER

PAD TYPE

DESCRIPTION

CMOS output, tri-

UART_TX

42

state, with weak UART data output, active high

internal pull-up

CMOS output, tri-

UART_RTS#

UART_RX

14

15

19

state, with weak UART request to send, active low

internal pull-up

CMOS input, tri-

state, with weak UART data input, active high

internal pull-down

CMOS input, tri-

state, with weak UART clear to send, active low

internal pull-down

UART_CTS#

Table 4: UART Terminal Descriptions

Silicon Labs

Page 9 of 44

NUMBER

USB Interfaces

PAD TYPE

DESCRIPTION

USB data plus with selectable internal 1.5k

pull-up resistor

USB data minus

USB+

USB-

17

18

Bidirectional

Table 5: USB Terminal Descriptions

SPI

INTERFACE

NUMBER

PAD TYPE

DESCRIPTION

SPI data input

CMOS input with weak

internal pull-down

SPI_MOSI

40

CMOS input with weak Chip select for Serial Peripheral

SPI_CS#

37

internal pull-up

Interface, active low

CMOS input with weak

internal pull-down

CMOS output, tristate,

with weak internal pull SPI data output

down

SPI_CLK

38

39

SPI clock

SPI_MISO

Table 6: Terminal Descriptions

Silicon Labs

Page 10 of 44

3 Electrical Characteristics

3.1 Absolute Maximum Ratings

Rating

Min

Max

Unit

Storage Temperature

-40

85

°C

VDD_PA, VDD

-0.4

3.7

V

Other Terminal Voltages

VSS-0.4

VDD+0.4

Table 7: Absolute Maximum Ratings

3.2 Recommended Operating Conditions

Rating

Min

-40

3.0

Max

85

3.6

Unit

°C

V

Operating Temperature Range

VDD_PA, VDD ^*)

*) VDD_PA has an effect on the RF output power.

Table 8: Recommended Operating Conditions

3.3 PIO Current Sink and Source Capability

Figure 2: WT41-E PIO Current Drive Capability

Silicon Labs

Page 11 of 44

3.4 Transmitter Performance For BDR

Antenna gain 2.3dBi taken into account

RF Characetristics, VDD = 3.3V @ room

Bluetooth

Min

Typ

Max

Unit

dBm

temperature unless otherwise specified

Specification

maximum RF Transmit Power

17

19

20

RF power variation over temperature range

RF power variation over supply voltage range (*

1

2

-

dB

RF power variation over BT band

RF power control range (*

0.1

-10

0.5

2

19

20dB band width for modulated carrier

F = F₀± 2MHz

942

1000

-20

kHz

-20

-40

ACP (1

F = F₀± 3MHz

F = F₀> 3MHz

-40

Drift rate

ΔF_1avg

7

169

+/-25

140<175

kHz

161

1.1

140<175

>=0.8

kHz

ΔF1_max

ΔF_2avg/ ΔF_1avg

Table 9: Transmitter performance for BDR

Figure 3: Typical TX power as a function of VDD_PA

Silicon Labs

Page 12 of 44

3.4.1 Radiated Spurious Emissions

Measured from WT41-E evaluation board

Min

Typ

Max

Limit by the Standard

(AVG / PEAK)

Standard

Band / Frequency

Unit

(AVG / (AVG / (AVG /

PEAK) PEAK) PEAK)

2nd harmonic

3rd harmonic

Band edge

2390MHz

Band edge

52

51

54/58

54 / 74

dBuV/m

50/60

52/63

54 / 74

dBuV/m

FCC part 15

transmitter

spurious

52/65

54/67

2483.5MHz

Band edge

2400MHz

emissions

-50

-20

dBc

(conducted)

Band edge

2483.5MHz

(conducted)

Band edge

2400MHz

2nd harmonic

3rd harmonic

-58

-39

-20

-30

dBc

ETSI EN 300 328

transmitter

spurious

-36

dBm

-41

-

-30

-47

dBm

emissions

ETSI EN 300 328 (2400 - 2479) MHz

receiver spurious

(1600 - 1653) MHz

-52

Table 10: Radiated spurious emission for WT41-E

3.5 Receiver Performance

Antenna gain not taken into account

RF characteristis, VDD = 3.3V,

Bluetooth

Spefication

Packet type Min

Typ

Max

Unit

room temperature (**

DH1

DH3

DH5

2-DH1

2-DH3

2-DH5

3-DH1

3-DH3

3-DH5

-92

-91

-94

-93

-88

-85

-84

-70

dBm

Sensitivity for 0.1% BER

Sensitivity variation over

temperature range

TBD

Table 11: Receiver sensitivity

Silicon Labs

Page 13 of 44

3.6 Current Consumption

Opearation mode

Peak (mA)

-

AVG (mA)

2.1

Stand-by, page mode 0

TX 3DH5

TX 2DH5

TX 3DH3

TX 2DH3

TX 2DH1

TX DH5

100.5

99.3

98.1

98.7

164

77.6

71.1

71.2

51.6

120

TX DH1

166

56.8

67.3

52.6

0.36

58.7

RX

Deep sleep

Inquiry

169.3

Table 12: Current consumption

Silicon Labs

Page 14 of 44

3.7 Antenna Specification

WT41-E is designed and qualified to be used with a 2.14 dBi dipole antenna. Any dipole antenna with the

same or less gain can be used with WT41-E as far as the technical information of the antenna is provided for

Bluegiga for approval. Any antenna approved by Bluegiga can be used with WT41-E without additional

applications to FCC or IC. Table 19 on page 42 lists the antennas pre-approved by Bluegiga. Using an

antenna of a different type (i.e. different radiation pattern) or higher gain will require a permissive change for

the certifications. Please contact support@bluegiga.com for details

Silicon Labs

Page 15 of 44

4 Physical Dimensions

Figure 4: Physical dimensions (top view)

Figure 5: Dimensions for the RF pin (top view)

Silicon Labs

Page 16 of 44

25.3 mm

3.35 mm

35.3 mm

11.4 mm

14.0 mm

32.6 mm

Figure 6: Dimensions of WT41-E

Figure 7: Recommended land pattern

Silicon Labs

Page 17 of 44

path for the return current is cut

• MIC input

– Place LC filtering and DC coupling capacitors symmetrically as close to

pins as possible

– Place MIC biasing resistors symmetrically as close to microhone as pos

5 Layout Guidelines

– Make sure that the bias trace does not cross separated GND regions (D

Use good layout practices to avoid excessive noise coupling to supply voltage traces or sensitive analog

signal traces, such as analog audio signals. If using overlapping ground planes use stitching vias separated

AGND) so that the path for the return current is cut. If this is not possibl

^{by m}n^axo³t^ms^me^tp^oa^avr^oa^idt^ee^miG^ssiN^onD^fromre^thg^ei^eo^dn^ges^{s o}b^{f t}u^het^Pk^Ce^Be^{. C}p^ono^nen^cte^alls^tho^el^Gid^NDG^pN^insD^direp^cl^tla^yn^toe^a.^{solid GND}

plane and make sure that there is a low impedance path for the return current following the signal and supply

traces all the way from start to the end.

– Keep the trace as short as possible

A good practice is to dedicate one of the inner layers to a solid GND plane and one of the inner layers to

supply voltage planes and traces and route all the signals on top and bottom layers of the PCB. This

arrangement will make sure that any return current follows the forward current as close as possible and any

loops are minimized.

Recommended PCB layer configuration

Signals

GND

Power

Signals

Figure 8: Typical 4-layer PCB construction

Overlapping GND layers without

GND stitching vias

Overlapping GND layers with

GND stitching vias shielding the

RF energy

Figure 9: Use of stitching vias to avoid emissions from the edges of the PCB

Silicon Labs

Page 18 of 44

6 UART Interface

This is a standard UART interface for communicating with other serial devices.WT41-E UART interface

provides a simple mechanism for communicating with other serial devices using the RS232 protocol.

Four signals are used to implement the UART function. When WT41-E is connected to another digital device,

UART_RX and UART_TX transfer data between the two devices. The remaining two signals, UART_CTS and

UART_RTS, can be used to implement RS232 hardware flow control where both are active low indicators. All

UART connections are implemented using CMOS technology and have signalling levels of 0V and VDD.

UART configuration parameters, such as data rate and packet format, are set using WT41-E software.

Note:

In order to communicate with the UART at its maximum data rate using a standard PC, an accelerated serial

port adapter card is required for the PC.

Table 13: Possible UART Settings

The UART interface is capable of resetting WT41-E upon reception of a break signal. A break is identified by a

continuous logic low (0V) on the UART_RX terminal, as shown in Figure 10. If tBRK is longer than the value,

defined by PSKEY_HOST_IO_UART_RESET_TIMEOUT, (0x1a4), a reset will occur. This feature allows a

host to initialise the system to a known state. Also, WT41-E can emit a break character that may be used to

wake the host.

Figure 10: Break Signal

Table 17 shows

a

list of commonly used data rates and their associated values for

PSKEY_UART_BAUD_RATE (0x204). There is no requirement to use these standard values. Any data rate

within the supported range can be set in the PS Key according to the formula in Equation 1.

Silicon Labs

Page 19 of 44

Equation 1: Data Rate

Table 14: Standard Data Rates

Silicon Labs

Page 20 of 44

6.1 UART Bypass

Figure 11: UART Bypass Architecture

6.2 UART Configuration While Reset is Active

The UART interface for WT41-E while the chip is being held in reset is tristate. This will allow the user to daisy

chain devices onto the physical UART bus. The constraint on this method is that any devices connected to

this bus must tristate when WT41-E reset is de-asserted and the firmware begins to run.

6.3 UART Bypass Mode

Alternatively, for devices that do not tristate the UART bus, the UART bypass mode on BlueCore4-External

can be used. The default state of BlueCore4-External after reset is de-asserted; this is for the host UART bus

to be connected to the BlueCore4-External UART, thereby allowing communication to BlueCore4-External via

the UART. All UART bypass mode connections are implemented using CMOS technology and have signalling

levels of 0V and VDD.

In order to apply the UART bypass mode, a BCCMD command will be issued to BlueCore4-External. Upon

this issue, it will switch the bypass to PIO[7:4] as Figure 11 indicates. Once the bypass mode has been

invoked, WT41-E will enter the Deep Sleep state indefinitely.

In order to re-establish communication with WT41-E, the chip must be reset so that the default configuration

takes effect.

It is important for the host to ensure a clean Bluetooth disconnection of any active links before the bypass

mode is invoked. Therefore, it is not possible to have active Bluetooth links while operating the bypass mode.

The current consumption for a device in UART bypass mode is equal to the values quoted for a device in

standby mode.

Silicon Labs

Page 21 of 44

7 USB Interface

This is a full speed (12Mbits/s) USB interface for communicating with other compatible digital devices. WT41-

E acts as a USB peripheral, responding to requests from a master host controller such as a PC.

The USB interface is capable of driving a USB cable directly. No external USB transceiver is required. The

device operates as a USB peripheral, responding to requests from a master host controller such as a PC.

Both the OHCI and the UHCI standards are supported. The set of USB endpoints implemented can behave as

specified in the USB section of the Bluetooth v2.1 + EDR specification or alternatively can appear as a set of

endpoints appropriate to USB audio devices such as speakers.

As USB is a master/slave oriented system (in common with other USB peripherals), WT41-E only supports

USB Slave operation.

7.1 USB Data Connections

The USB data lines emerge as pins USB_DP and USB_DN. These terminals are connected to the internal

USB I/O buffers of the BlueCore4-External, therefore, have a low output impedance. To match the connection

to the characteristic impedance of the USB cable, resistors must be placed in series with USB_DP/USB_DN

and the cable.

7.2 USB Pull-Up resistor

WT41-E features an internal USB pull-up resistor. This pulls the USB_DP pin weakly high when WT41-E is

ready to enumerate. It signals to the PC that it is a full speed (12Mbits/s) USB device.

The USB internal pull-up is implemented as a current source, and is compliant with section 7.1.5 of the USB

specification v1.2. The internal pull-up pulls USB_DP high to at least 2.8V when loaded with a 15k 5% pull-

down resistor (in the hub/host) when VDD_PADS = 3.1V. This presents a Thevenin resistance to the host of

at least 900. Alternatively, an external 1.5k pull-up resistor can be placed between a PIO line and D+ on the

USB cable. The firmware must be alerted to which mode is used by setting PSKEY_USB_PIO_PULLUP

appropriately. The default setting uses the internal pull-up resistor.

7.3 USB Power Supply

The USB specification dictates that the minimum output high voltage for USB data lines is 2.8V. To safely

meet the USB specification, the voltage on the VDD supply terminal must be an absolute minimum of 3.1V.

Bluegiga recommends 3.3V for optimal USB signal quality.

7.4 Self-Powered Mode

In self-powered mode, the circuit is powered from its own power supply and not from the VBUS (5V) line of the

USB cable. It draws only a small leakage current (below 0.5mA) from VBUS on the USB cable. This is the

easier mode for which to design, as the design is not limited by the power that can be drawn from the USB

hub or root port. However, it requires that VBUS be connected to WT41-E via a resistor network (Rvb1 and

Rvb2), so WT41-E can detect when VBUS is powered up. BlueCore4-External will not pull USB_DP high

when VBUS is off.

Self-powered USB designs (powered from a battery or PSU) must ensure that a PIO line is allocated for USB

pullup purposes. A 1.5k 5% pull-up resistor between USB_DP and the selected PIO line should be fitted to the

design. Failure to fit this resistor may result in the design failing to be USB compliant in self-powered mode.

The internal pull-up in BlueCore is only suitable for bus-powered USB devices, e.g., dongles.

Silicon Labs

Page 22 of 44

Figure 12: USB Connections for Self-Powered Mode

The terminal marked USB_ON can be any free PIO pin. The PIO pin selected must be registered by setting

PSKEY_USB_PIO_VBUS to the corresponding pin number.

Figure 13: USB Interface Component Values

7.5 Bus-Powered Mode

In bus-powered mode, the application circuit draws its current from the 5V VBUS supply on the USB cable.

WT41-E negotiates with the PC during the USB enumeration stage about how much current it is allowed to

consume. On power-up the device must not draw more than 100 mA but after being configured it can draw up

to 500 mA.

For WT41-E, the USB power descriptor should be altered to reflect the amount of power required. This is

accomplished by setting PSKEY_USB_MAX_POWER (0x2c6). This is higher than for a Class 2 application

due to the extra current drawn by the Transmit RF PA. By default for WT41-E the setting is 300 mA.

When selecting a regulator, be aware that VBUS may go as low as 4.4V. The inrush current (when charging

reservoir and supply decoupling capacitors) is limited by the USB specification. See the USB Specification.

Some applications may require soft start circuitry to limit inrush current if more than 10uF is present between

VBUS and GND. The 5V VBUS line emerging from a PC is often electrically noisy. As well as regulation down

to 3.3V and 1.8V, applications should include careful filtering of the 5V line to attenuate noise that is above the

voltage regulator bandwidth. Excessive noise on WT41-E supply pins will result in reduced receiver sensitivity

and a distorted RF transmit signal.

Silicon Labs

Page 23 of 44

Figure 14: USB Connections for Bus-Powered Mode

7.6 USB Suspend Current

All USB devices must permit the USB controller to place them in a USB suspend mode. While in USB

Suspend, bus-powered devices must not draw more than 2.5mA from USB VBUS (self-powered devices may

draw more than 2.5mA from their own supply). This current draw requirement prevents operation of the radio

by bus-powered devices during USB Suspend.

When computing suspend current, the current from VBUS through the bus pull-up and pull-down resistors

must be included. The pull-up resistor at the device is 1.5 k. (nominal). The pull-down resistor at the hub is

14.25k. to 24.80k. The pull-up voltage is nominally 3.3V, which means that holding one of the signal lines high

takes approximately 200uA, leaving only 2.3mA available from a 2.5mA budget. Ensure that external LEDs

and/or amplifiers can be turned off by BlueCore4-External. The entire circuit must be able to enter the

suspend mode.

7.7 USB Detach and Wake-Up Signaling

WT41-E can provide out-of-band signaling to a host controller by using the control lines called USB_DETACH

and USB_WAKE_UP. These are outside the USB specification (no wires exist for them inside the USB cable),

but can be useful when embedding WT41-E into a circuit where no external USB is visible to the user. Both

control lines are shared with PIO pins and can be assigned to any PIO pin by setting

PSKEY_USB_PIO_DETACH and PSKEY_USB_PIO_WAKEUP to the selected PIO number.

USB_DETACH is an input which, when asserted high, causes WT41-E to put USB_DN and USB_DP in high

impedance state and turns off the pull-up resistor on DP. This detaches the device from the bus and is

logically equivalent to unplugging the device. When USB_DETACH is taken low, WT41-E will connect back to

USB and await enumeration by the USB host.

USB_WAKE_UP is an active high output (used only when USB_DETACH is active) to wake up the host and

allow USB communication to recommence. It replaces the function of the software USB WAKE_UP message

(which runs over the USB cable) and cannot be sent while BlueCore4-External is effectively disconnected

from the bus.

Silicon Labs

Page 24 of 44

Figure 15: USB_Detach and USB_Wake_Up Signals

7.8 USB Driver

A USB Bluetooth device driver is required to provide a software interface between BlueCore4-External and

Bluetooth software running on the host computer. Please, contact support@bluegiga.com for suitable drivers.

7.9 USB v2.0 Compliance and Compatibility

Although WT41-E meets the USB specification, CSR cannot guarantee that an application circuit designed

around the module is USB compliant. The choice of application circuit, component choice and PCB layout all

affect USB signal quality and electrical characteristics. The information in this document is intended as a guide

and should be read in association with the USB specification, with particular attention being given to Chapter

7. Independent USB qualification must be sought before an application is deemed USB compliant and can

bear the USB logo. Such qualification can be obtained from a USB plugfest or from an independent USB test

house.

Terminals USB_DP and USB_DN adhere to the USB Specification v2.0 (Chapter 7) electrical requirements.

BlueCore4-External is compatible with USB v2.0 host controllers; under these circumstances the two ends

agree the mutually acceptable rate of 12Mbits/s according to the USB v2.0 specification.

Silicon Labs

Page 25 of 44

8 Serial Peripheral Interface (SPI)

The SPI port can be used for system debugging. It can also be used for programming the Flash memory and

setting the PSKEY configurations. WT41-E uses 16-bit data and 16-bit address serial peripheral interface,

where transactions may occur when the internal processor is running or is stopped. SPI interface is connected

using the MOSI, MISO, CSB and CLK pins. Please, contact support@bluegiga.com for detailed information

about the instruction cycle.

Silicon Labs

Page 26 of 44

9 PCM Codec Interface

PCM is a standard method used to digitize audio (particularly voice) for transmission over digital

communication channels. Through its PCM interface, WT41-E has hardware support for continual

transmission and reception of PCM data, thus reducing processor overhead for wireless headset applications.

WT41-E offers a bidirectional digital audio interface that routes directly into the baseband layer of the on-chip

firmware. It does not pass through the HCI protocol layer.

Hardware on WT41-E allows the data to be sent to and received from a SCO connection. Up to three SCO

connections can be supported by the PCM interface at any one time.

WT41-E can operate as the PCM interface master generating an output clock of 128, 256 or 512kHz. When

configured as PCM interface slave, it can operate with an input clock up to 2048kHz. WT41-E is compatible

with a variety of clock formats, including Long Frame Sync, Short Frame Sync and GCI timing environments.

It supports 13-bit or 16-bit linear, 8-bit µ-law or A-law companded sample formats at 8ksamples/s and can

receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM

configuration options are enabled by setting PSKEY_PCM_CONFIG32.

WT41-E interfaces directly to PCM audio devices.

NOTE: Analog audio lines are very sensitive to RF disturbance. Use good layout practices to ensure noise

less audio. Make sure that the return path for the audio signals follows the forward current all the way as close

as possible and use fully differential signals when possible. Do not compromise audio routing.

9.1 PCM Interface Master/Slave

When configured as the master of the PCM interface, WT41-E generates PCM_CLK and PCM_SYNC.

Figure 16: PCM Interface Master

When configured as the Slave of the PCM interface, WT41-E accepts PCM_CLK rates up to 2048kHz.

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Figure 17: PCM Interface Slave

9.2 Long Frame Sync

Long Frame Sync is the name given to a clocking format that controls the transfer of PCM data words or

samples. In Long Frame Sync, the rising edge of PCM_SYNC indicates the start of the PCM word. When

WT41-E is configured as PCM master, generating PCM_SYNC and PCM_CLK, then PCM_SYNC is 8-bits

long. When WT41-E is configured as PCM Slave, PCM_SYNC may be from two consecutive falling edges of

PCM_CLK to half the PCM_SYNC rate, i.e., 62.5s long.

Figure 18: Long Frame Sync (Shown with 8-bit Companded Sample)

WT41-E samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT on the rising edge.

PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the LSB position or

on the rising edge.

9.3 Short Frame Sync

In Short Frame Sync, the falling edge of PCM_SYNC indicates the start of the PCM word. PCM_SYNC is

always one clock cycle long.

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Figure 19: Short Frame Sync (Shown with 16-bit Sample)

As with Long Frame Sync, WT41-E samples PCM_IN on the falling edge of PCM_CLK and transmits

PCM_OUT on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of

PCM_CLK in the LSB position or on the rising edge.

9.4 Multi-slot Operation

More than one SCO connection over the PCM interface is supported using multiple slots. Up to three SCO

connections can be carried over any of the first four slots.

Figure 20: Multi-slot Operation with Two Slots and 8-bit Companded Samples

9.5 GCI Interface

WT41-E is compatible with the GCI, a standard synchronous 2B+D ISDN timing interface. The two 64kbits/s B

channels can be accessed when this mode is configured.

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Figure 21: GCI Interface

The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz. With WT41-E in Slave

mode, the frequency of PCM_CLK can be up to 4.096MHz.

9.6 Slots and Sample Formats

WT41-E can receive and transmit on any selection of the first four slots following each sync pulse. Slot

durations can be either 8 or 16 clock cycles. Durations of 8 clock cycles may only be used with 8-bit sample

formats. Durations of 16 clocks may be used with 8-bit, 13-bit or 16-bit sample formats.

WT41-E supports 13-bit linear, 16-bit linear and 8-bit -law or A-law sample formats. The sample rate is

8ksamples/s. The bit order may be little or big endian. When 16-bit slots are used, the 3 or 8 unused bits in

each slot may be filled with sign extension, padded with zeros or a programmable 3-bit audio attenuation

compatible with some Motorola codecs.

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Figure 22: 16-bit Slot Length and Sample Formats

9.7 Additional Features

WT41-E has a mute facility that forces PCM_OUT to be 0. In master mode, PCM_SYNC may also be forced

to 0 while keeping PCM_CLK running which some codecs use to control power down.

9.8 PCM_CLK and PCM_SYNC Generation

WT41-E has two methods of generating PCM_CLK and PCM_SYNC in master mode. The first is generating

these signals by DDS from BlueCore4-External internal 4MHz clock. Using this mode limits PCM_CLK to 128,

256 or 512kHz and PCM_SYNC to 8kHz. The second is generating PCM_CLK and PCM_SYNC by DDS from

an internal 48MHz clock (which allows a greater range of frequencies to be generated with low jitter but

consumes more power). This second method is selected by setting bit 48M_PCM_CLK_GEN_EN in

PSKEY_PCM_CONFIG32. When in this mode and with long frame sync, the length of PCM_SYNC can be

either 8 or 16 cycles of PCM_CLK, determined by LONG_LENGTH_SYNC_EN in PSKEY_PCM_CONFIG32.

The Equation 2 describes PCM_CLK frequency when being generated using the internal 48MHz clock:

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Equation 2: PCM_CLK Frequency When Being Generated Using the Internal 48MHz Clock

The frequency of PCM_SYNC relative to PCM_CLK can be set using Equation 3:

Equation 3: PCM_SYNC Frequency Relative to PCM_CLK

CNT_RATE, CNT_LIMIT and SYNC_LIMIT are set using PSKEY_PCM_LOW_JITTER_CONFIG. As an

example,

to

generate

PCM_CLK

at

512kHz

with

PCM_SYNC

at

8kHz,

set

PSKEY_PCM_LOW_JITTER_CONFIG to 0x08080177.

9.9 PCM Configuration

The PCM configuration is set using two PS Keys, PSKEY_PCM_CONFIG32 detailed in Table 18 and

PSKEY_PCM_LOW_JITTER_CONFIG in Table 19. The default for PSKEY_PCM_CONFIG32 is 0x00800000,

i.e., first slot following sync is active, 13-bit linear voice format, long frame sync and interface master

generating 256kHz PCM_CLK from 4MHz internal clock with no tri-state of PCM_OUT.

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Name

Bit position

Description

0

Set to 0

-

0 selects Master mode with internal generation of PCM_CLK and

PCM_SYNC. 1 selects Slave mode requiring externally generated

PCM_CLK and PCM_SYNC. This should be set to 1 if

48M_PCM_CLK_GEN_EN (bit 11) is set.

SLAVE MODE EN

1

0 selects long frame sync (rising edge indicates start of frame), 1

selects short frame sync (falling edge indicates start of frame).

SHORT SYNC EN

-

2

3

Set to 0

0 selects padding of 8 or 13-bit voice sample into a 16- bit slot by

inserting extra LSBs, 1 selects sign extension. When padding is

selected with 3-bit voice sample, the 3 padding bits are the audio gain

setting; with 8-bit samples the 8 padding bits are zeroes.

0 transmits and receives voice samples MSB first, 1 uses LSB first.

SIGN EXTENDED

EN

4

LSB FIRST EN

5

6

0 drives PCM_OUT continuously, 1 tri-states PCM_OUT immediately

after the falling edge of PCM_CLK in the last bit of an active slot,

assuming the next slot is not active.

TX TRISTATE EN

0 tristates PCM_OUT immediately after the falling edge of PCM_CLK

in the last bit of an active slot, assuming the next slot is also not active.

1 tristates PCM_OUT after the rising edge of PCM_CLK.

TX TRISTATE

RISING EDGE EN

7

8

0 enables PCM_SYNC output when master, 1 suppresses PCM_SYNC

whilst keeping PCM_CLK running. Some CODECS utilize this to enter

a low power state.

SYNC SUPPRESS

EN

GCI MODE EN

MUTE EN

9

10

1 enables GCI mode.

1 forces PCM_OUT to 0.

0 sets PCM_CLK and PCM_SYNC generation via DDS from internal 4

MHz clock, as for BlueCore4-External. 1 sets PCM_CLK and

PCM_SYNC generation via DDS from internal 48 MHz clock.

48M PCM CLK GEN

EN

11

12

0 sets PCM_SYNC length to 8 PCM_CLK cycles and 1 sets length to

16 PCM_CLK cycles. Only applies for long frame sync and with

48M_PCM_CLK_GEN_EN set to 1.

LONG LENGTH

SYNC EN

-

[20:16]

[22:21]

Set to 0b00000.

Selects 128 (0b01), 256 (0b00), 512 (0b10) kHz PCM_CLK frequency

when master and 48M_PCM_CLK_GEN_EN (bit 11) is low.

MASTER CLK RATE

ACTIVE SLOT

[26:23]

[28:27]

Default is 0001. Ignored by firmaware

Selects between 13 (0b00), 16 (0b01), 8 (0b10) bit sample with 16

cycle slot duration 8 (0b11) bit sample 8 cycle slot duration.

SAMPLE_FORMAT

Table 15: PSKEY_PCM_CONFIG32 description

Name

Bit position

Description

CNT LIMIT

CNT RATE

SYNC LIMIT

[12:0]

[23:16]

[31:24]

Sets PCM_CLK counter limit

Sets PCM_CLK count rate.

Sets PCM_SYNC division relative to PCM_CLK.

Table 16: PSKEY_PCM_LOW_JITTER_CONFIG Description

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10 I/O Parallel Ports

Six lines of programmable bidirectional input/outputs (I/O) are provided. All the PIO lines are power from VDD.

PIO lines can be configured through software to have either weak or strong pull-ups or pull-downs. All PIO

lines are configured as inputs with weak pull-downs at reset. Any of the PIO lines can be configured as

interrupt request lines or as wake-up lines from sleep modes.

WT41-E has a general purpose analogue interface pin AIO[1]. This is used to access internal circuitry and

control signals. It may be configured to provide additional functionality.

Auxiliary functions available via AIO[1] include an 8-bit ADC and an 8-bit DAC. Typically the ADC is used for

battery voltage measurement. Signals selectable at this pin include the band gap reference voltage and a

variety of clock signals: 48, 24, 16, 8MHz and the XTAL clock frequency. When used with analogue signals,

the voltage range is constrained by the analogue supply voltage internally to the module (1.8V). When

configured to drive out digital level signals (e.g., clocks), the output voltage level is determined by VDD.

10.1PIO Defaults

Bluegiga cannot guarantee that these terminal functions remain the same. Refer to the software release note

for the implementation of these PIO lines, as they are firmware build-specific.

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11 Reset

WT41-E may be reset from several sources: RESET pin, power on reset, a UART break character or via

software configured watchdog timer. The RESET pin is an active low reset and is internally filtered using the

internal low frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESETB

being active. It is recommended that RESET be applied for a period greater than 5ms.

The power on reset occurs when the VDD_CORE supply internally to the module falls below typically 1.5V

and is released when VDD_CORE rises above typically 1.6V. At reset the digital I/O pins are set to inputs for

bidirectional pins and outputs are tri-state.

The reset should be held active at power up until all the supply voltages have stabilized to ensure correct

operation of the internal flash memory. Following figure shows an example of a simple power up reset circuit.

Time constant of the RC circuitry is set so that the supply voltage is safely stabilized before the reset

deactivates.

Figure 23: Example of a simple power on reset circuit.

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11.1Pin States on Reset

PIN NAME

PIO[7:2]

PCM_OUT

PCM_IN

PCM_SYNC

PCM_CLK

UART_TX

UART_RX

UART_RTS

UART_CTS

USB+

STATE

Input with weak pull-down

Tri-staed with weak pull-down

Input with weak pull-down

Output tristated with weak pull-up

Input with weak pull-down

Output tristated with weak pull-up

Input with weak pull-down

Output tristated with weak pull-down

Output, driving low

USB-

SPI_CSB

SPI_CLK

SPI_MOSI

SPI_MISO

AIO[1]

Table 17: Pin States on Reset

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12 Certifications

WT41-E is compliant to the following specifications.

12.1Bluetooth

WT41-E module is Bluetooth qualified and listed as a controller subsystem and it is Bluetooth compliant to the

following profiles of the core spec version 2.1/2.1+EDR.



Baseband

HCI

Link Manager

Radio

The radio has been tested using maximum antenna gain of 2.3 dBi and the Bluetooth qualification is valid for

any antenna with the same or less gain.

12.2 FCC and IC

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may

cause undesired operation.

FCC RF Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End

users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter

must not be co-located or operating in conjunction with any other antenna or transmitter. This transmitter is

considered as mobile device and should not be used closer than 20 cm from a human body. To allow portable

use in a known host class 2 permissive change is required. Please contact support@bluegiga.com for detailed

information.

IC Statements:

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the

following two conditions: (1) this device may not cause interference, and (2) this device must accept any

interference, including interference that may cause undesired operation of the device.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and

maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio

interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically

radiated power (e.i.r.p.) is not more than that necessary for successful communication.

If detachable antennas are used:

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This radio transmitter (identify the device by certification number, or model number ifCategory II) has been

approved by Industry Canada to operate with the antenna types listed below with the maximum permissible

gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list,

having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this

device. See table 19 for the approved antennas for WT41-E.

OEM Responsibilities to comply with FCC and Industry Canada Regulations

The WT41-E Module has been certified for integration into products only by OEM integrators under the

following conditions:



The antenna(s) must be installed such that a minimum separation distance of 20cm is maintained

between the radiator (antenna) and all persons at all times.



The transmitter module must not be co-located or operating in conjunction with any other antenna or

transmitter.

As long as the two conditions above are met, further transmitter testing will not be required. However, the

OEM integrator is still responsible for testing their end-product for any additional compliance requirements

required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).

IMPORTANT NOTE: In the event that these conditions can not be met (for certain configurations or co-

location with another transmitter), then the FCC and Industry Canada authorizations are no longer considered

valid and the FCC ID and IC Certification Number can not be used on the final product. In these

circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the

transmitter) and obtaining a separate FCC and Industry Canada authorization.

End Product Labeling

The WT41-E Module is labeled with its own FCC ID and IC Certification Number. If the FCC ID and IC

Certification Number are not visible when the module is installed inside another device, then the outside of the

device into which the module is installed must also display a label referring to the enclosed module. In that

case, the final end product must be labeled in a visible area with the following:

“Contains Transmitter Module FCC ID: QOQWT41E”

“Contains Transmitter Module IC: 5123A-BGTWT41E”

or

“Contains FCC ID: QOQWT41E

“Contains IC: 5123A-BGTWT41E”

The OEM of the WT41-E Module must only use the approved antenna(s) described in table 19, which have

been certified with this module.

The OEM integrator has to be aware not to provide information to the end user regarding how to install or

remove this RF module or change RF related parameters in the user manual of the end product.

To comply with FCC and Industry Canada RF radiation exposure limits for general population, the

antenna(s) used for this transmitter must be installed such that a minimum separation distance of

20cm is maintained between the radiator (antenna) and all persons at all times and must not be co-

located or operating in conjunction with any other antenna or transmitter.

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12.2.1 FCC et IC

Cet appareil est conforme à l’alinéa 15 des règles de la FCC. Deux conditions sont à respecter lors de

son utilisation :

(1) cet appareil ne doit pas créer d’interférence susceptible de causer un quelconque dommage et,

(2) cet appareil doit accepter toute interférence, quelle qu’elle soit, y compris les interférences

susceptibles d’entraîner un fonctionnement non requis.

Déclaration de conformité FCC d’exposition aux radiofréquences (RF):

Ce matériel respecte les limites d’exposition aux radiofréquences fixées par la FCC dans un environnement

non contrôlé. Les utilisateurs finaux doivent se conformer aux instructions d’utilisation spécifiées afin de

satisfaire aux normes d’exposition en matière de radiofréquence. Ce transmetteur ne doit pas être installé ni

utilisé en concomitance avec une autre antenne ou un autre transmetteur. Ce transmetteur est assimilé à un

appareil mobile et ne doit pas être utilisé à moins de 20 cm du corps humain. Afin de permettre un usage

mobile dans le cadre d’un matériel de catégorie 2, il est nécessaire de procéder à quelques adaptations. Pour

des informations détaillées, veuillez contacter le support technique Bluegiga : support@bluegiga.com.

Déclaration de conformité IC :

Ce matériel respecte les standards RSS exempt de licence d’Industrie Canada. Son utilisation est soumise

aux deux conditions suivantes :

(1) l’appareil ne doit causer aucune interférence, et

(2) l’appareil doit accepter toute interférence, quelle qu’elle soit, y compris les interférences

susceptibles d’entraîner un fonctionnement non requis de l’appareil.

Selon la réglementation d’Industrie Canada, ce radio-transmetteur ne peut utiliser qu’un seul type d’antenne

et ne doit pas dépasser la limite de gain autorisée par Industrie Canada pour les transmetteurs. Afin de

réduire les interférences potentielles avec d’autres utilisateurs, le type d’antenne et son gain devront être

définis de telle façon que la puissance isotrope rayonnante équivalente (EIRP) soit juste suffisante pour

permettre une bonne communication.

Lors de l’utilisation d’antennes amovibles :

Ce radio-transmetteur (identifié par un numéro certifié ou un numéro de modèle dans le cas de la catégorie II)

a été approuvé par Industrie Canada pour fonctionner avec les antennes référencées ci-dessous dans la

limite de gain acceptable et l’impédance requise pour chaque type d’antenne cité. Les antennes non

référencées possédant un gain supérieur au gain maximum autorisé pour le type d’antenne auquel elles

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appartiennent sont strictement interdites d’utilisation avec ce matériel. Veuillez vous référer au tableau 19

concernant les antennes approuvées pour les WT41-E.

Les responsabilités de l’intégrateur afin de satisfaire aux réglementations de la FCC et d’Industrie

Canada :

Les modules WT41-E ont été certifiés pour entrer dans la fabrication de produits exclusivement réalisés par

des intégrateurs dans les conditions suivantes :



L’antenne (ou les antennes) doit être installée de façon à maintenir à tout instant une distance

minimum de 20cm entre la source de radiation (l’antenne) et toute personne physique.

Le module transmetteur ne doit pas être installé ou utilisé en concomitance avec une autre antenne

ou un autre transmetteur.



Tant que ces deux conditions sont réunies, il n’est pas nécessaire de procéder à des tests supplémentaires

sur le transmetteur. Cependant, l’intégrateur est responsable des tests effectués sur le produit final afin de se

mettre en conformité avec d’éventuelles exigences complémentaires lorsque le module est installé (exemple :

émissions provenant d’appareils numériques, exigences vis-à-vis de périphériques informatiques, etc.) ;

IMPORTANT : Dans le cas où ces conditions ne peuvent être satisfaites (pour certaines configurations ou

installation avec un autre transmetteur), les autorisations fournies par la FCC et Industrie Canada ne sont plus

valables et les numéros d’identification de la FCC et de certification d’Industrie Canada ne peuvent servir pour

le produit final. Dans ces circonstances, il incombera à l’intégrateur de faire réévaluer le produit final

(comprenant le transmetteur) et d’obtenir une autorisation séparée de la part de la FCC et d’Industrie Canada.

Etiquetage du produit final

Chaque module WT41-E possède sa propre identification FCC et son propre numéro de certification IC. Si

l’identification FCC et le numéro de certification IC ne sont pas visibles lorsqu’un module est installé à

l’intérieur d’un autre appareil, alors l’appareil en question devra lui aussi présenter une étiquette faisant

référence au module inclus. Dans ce cas, le produit final doit comporter une étiquette placée de façon visible

affichant les mentions suivantes :

« Contient un module transmetteur certifié FCC QOQWT41E »

« Contient un module transmetteur certifié IC 5123A-BGTWT41E »

ou

« Inclut la certification FCC QOQWT41E »

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« Inclut la certification IC 5123A-BGTWT41E »

L’intégrateur du module WT41-E ne doit utiliser que les antennes répertoriées dans le tableau 19 certifiées

pour ce module.

L’intégrateur est tenu de ne fournir aucune information à l’utilisateur final autorisant ce dernier à installer ou

retirer le module RF, ou bien changer les paramètres RF du module, dans le manuel d’utilisation du produit

final.

Afin de se conformer aux limites de radiation imposées par la FCC et Industry Canada, l’antenne (ou

les antennes) utilisée pour ce transmetteur doit être installée de telle sorte à maintenir une distance

minimum de 20cm à tout instant entre la source de radiation (l’antenne) et les personnes physiques.

En outre, cette antenne ne devra en aucun cas être installée ou utilisée en concomitance avec une

autre antenne ou un autre transmetteur.

12.3CE

WT41-E meets the requirements of the standards below and hence fulfills the requirements of EMC Directive

89/336/EEC as amended by Directives 92/31/EEC and 93/68/EEC within CE marking requirement.The official

DoC is available at www.bluegiga.com

12.4 MIC Japan

The compliance for MIC certification is tested with ARIB STD-T66. According to MIC regulations the OEM

integrator using a surface mountable module, such as WT41-E, will be responsible for re-evaluating the end

product (including the transmitter) and obtaining a separate authorization for the radio. WT41-E is tested to

meet the technical requirements of a radio for Japanese market. MIC regulations limit the maximum spectral

power density to 3mW/MHz. When using AFH the number of active channels can be as low as 20, which will

effectively increase the spectral power density. Thus when AFH is in use the transmit power must be

decreased nominally below 17 dBm to meet MIC Japan regulations.

12.5 KCC (Korea)

WT41-E is KCC certified with a certification number KCC-CRM-BGT-WT41-E.

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12.6 NCC Taiwan

根據 NCC 低功率電波輻射性電機管理辦法規定:

第十二條經型式認證合格之低功率射頻電機，非經許可，公司、商號或使用者均不得擅

自變更頻率、加大功率或變更原設計之特性及功能。

第十四條低功率射頻電機之使用不得影響飛航安全及干擾合法通信；經發現有干擾現象

時，應立即停用，並改善至無干擾時方得繼續使用。

前項合法通信，指依電信法規定作業之無線電通信。

低功率射頻電機須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干

擾。

此模組於取得認證後將依規定於模組本體標示審驗合格標籤,

並要求平台廠商於平台上標示「本產品內含射頻模組:ID 編號」字樣

12.6.1

NCC Taiwan labeling requirements

WT41-E is labeled with its own NCC ID number, and, if the NCC ID is not visible when the module is installed

inside another device, then the outside of the device into which the module is installed must also display a

label referring to the enclosed module. This exterior label can use wording such as the following: “Contains

Transmitter Module

NCC ID: CCAJ12LP2310T7”

Or

“Contains NCC ID: CCAJ12LP2310T7”

Any similar wording that expresses the same meaning may be used.

此模組於取得認證後將依規定於模組本體標示審驗合格標籤,

並要求平台廠商於平台上標示「本產品內含射頻模組: CCAJ12LP2310T7 編號」字樣

12.7 Qualified Antenna Types for WT41-E

This device has been designed to operate with a standard 2.14 dBi dipole antenna. Any antenna of a different

type or with a gain higher than 2.14 dBi is strictly prohibited for use with this device. Using an antenna of a

different type or gain more than 2.14 dBi will require additional testing for FCC, CE and IC. Please, contact

support@bluegiga.com for more information. The required antenna impedance is 50 ohms.

Qualified Antenna Types for WT41-E

Antenna Type

Maximum Gain

Dipole

2.14 dBi

Table 18: Qualified Antenna Types for WT41-E

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To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that

the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful

communication.

Any standard 2.14 dBi dipole antenna can be used without an additional application to FCC. Table 20 lists

approved antennas for WT41-E. Any approved antenna listed in table 20 can be used directly with WT41-E

without any additional approval. Any antenna not listed in table 20 can be used with WT41-E as long as

detailed information from that particular antenna is provided to Bluegiga for approval. Specification of each

antenna used with WT41-E will be filed by Bluegiga. Please, contact support@bluegiga.com for more

information.

Measure Specifie

d Gain

(dBi)

Measure Total

Efficiency (%)

Item

Manufacturer

Pulse

Linx Technologies Inc

EAD

Manufacturers part number

W1030

(dBi)

2 dBi

1

2

3

4

5

1

70 - 80

77

60

76 - 82

60 - 70

2 dBi

ANT-2.4-CW-CT-SMA

EA-79A

B4844/B6090

CAR-ATR-187-001

1.3

0.4

1.4

0.8

Antenova

Litecon

Table 19: Approved Antennas For WT41-E

12.8Moisture Sensitivity Level (MSL)

Moisture sensitivity level (MSL) of this product is 3. For the handling instructions please refer to JEDEC J-

STD-020 and JEDEC J-STD-033.

If baking is required, devices may be baked for 12 hours at 125°C +/-5°C for high temperature device

containers.

Silicon Labs

Page 43 of 44

厂商	型号	描述	页数
XPPOWER	WT400	直流 - 直流电源[ DC-DC Power Supplies ]	2 页
XPPOWER	WT401	直流 - 直流电源[ DC-DC Power Supplies ]	2 页
ETC	WT401X	直流到直流转换器\n[ DC to DC Converter ]	2 页
XPPOWER	WT402	直流 - 直流电源[ DC-DC Power Supplies ]	2 页
ETC	WT402X	直流到直流转换器\n[ DC to DC Converter ]	2 页
XPPOWER	WT402XU	[ 暂无描述 ]	2 页
XPPOWER	WT403	直流 - 直流电源[ DC-DC Power Supplies ]	2 页
XPPOWER	WT403X	[ Analog Circuit ]	2 页
XPPOWER	WT403XU	[ Analog Circuit ]	2 页
XPPOWER	WT404	直流 - 直流电源[ DC-DC Power Supplies ]	2 页