OX16CB950
Intelligent UART with 3.3v PCI/Cardbus Interface
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Single 16C950 High performance UART channel
Cardbus/3.3v PCI compliant, single-function target
controller. Fully compliant to PC Card Standard
7.0*, and PCI Bus Specification 2.2, Power
Management 1.0.
The OX16CB950 is a single chip UART solution for
either cardbus or PCI-based serial add-in cards. It is a
single function device, offering memory or IO mapped
access to the ultra-high performance OX16C950 UART.
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Function access to pre-configure UART prior to
handover to generic device drivers.
UART fully software compatible with 16C550-type
devices.
Baud rates up to 15Mbps in asynchronous mode
and 60Mbps in external 1x clock mode
128-byte deep FIFO per transmitter and receiver
Flexible clock prescaler from 1 to 31.875
Automated in-band flow control using
programmable Xon/Xoff in both directions
Automated out-of-band flow control using
CTS#/RTS# and/or DSR#/DTR#
Arbitrary trigger levels for receiver and transmitter
FIFO interrupts and automatic in-band and out-of-
band flow control
Infra-red (IrDA) receiver and transmitter operation
9-bit data framing as well as 5,6,7 and 8
Global Interrupt Status and readable FIFO levels
to facilitate implementation of efficient device
drivers
This UART is the fastest available PC-compatible
UART, offering data rates up to 15Mbps and 128-byte
deep transmitter and receiver FIFOs. The deep FIFOs
reduce CPU overhead and allow utilisation of higher
data rates. The UART is software compatible with the
widely used industry-standard 16C550 devices and
compatibles, as well as the OX16C95x family of high
performance UARTs. In addition to increased
performance and FIFO size, the UART also provides
the full set of OX16C95x enhanced features including
automated in-band flow control, readable FIFO levels
etc.
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A set of local registers is available to enhance device
driver efficiency and reduce interrupt latency. The
internal UART has features such as shadowed FIFO fill
levels, an interrupt source register and Good-Data
Status, readable in one DWORD register visible to
logical function0 in IO space and memory space.
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Detection of bad data in the receiver FIFO
Operation via IO or memory mapping.
2 Multi-purpose I/O pins which can be configured
as interrupt input or ‘wake-up’ pins
Can be reconfigured using optional Microwire
based non-volatile configuration memory
(EEPROM). The EEPROM is autodetected.
3.3V operation
The efficient 32-bit, 33MHz target-only interface is
compliant with both the cardbus sections of the PC
CARD Standard, release 7.0*, and the PCI bus
specifications version 2.2 and version 1.0 of PCI Power
Management Specification.
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For full flexibility, all the default register values can be
overwritten using an optional MicrowireTM serial
EEPROM.
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100 TQFP package
This EEPROM can also be used to provide function
access to pre-configure the UART into enhanced
modes prior to any cardbus/PCI configuration accesses
and before control is handed to generic device drivers.
*Compliance to PC Card Standard 7.1 requires external
circuitry
