HYS64T[16/32/64]0xxxHDL–[2.5/3.7/5]–A
Small Outline DDR2 SDRAM Modules
Pin Configuration and Block Diagrams
Table 6
Pin Configuration of SO-DIMM (cont’d)
Pin or Ball No.
Name Pin
Buffer Function
Type Type
197
SCL
SDA
I
CMOS Serial Bus Clock
This signal is used to clock data into and out of the
SPD EEPROM.
195
I/O
OD
Serial Bus Data
This is a bidirectional pin used to transfer data into or
out of the SPD EEPROM. A resistor must be
connected from SDA to VDDSPD on the motherboard to
act as a pull-up.
198
200
SA0
SA1
I
I
CMOS Serial Address Select Bus 2:0
Address pins used to select the Serial Presence
Detect base address.
CMOS
Power Supplies
1
VREF
AI
—
—
I/O Reference Voltage
Reference voltage for the SSTL-18 inputs.
199
VDDSPD PWR
EEPROM Power Supply
Power supplies for core, I/O, Serial Presence Detect,
and ground for the module.
81,82,87,88,95,96,103,104,
111,112,117,118
VDD
PWR
GND
—
—
Power Supply
Power supplies for core, I/O, Serial Presence Detect,
and ground for the module.
2,3,8,9,12,15,18,21,24,27,28, VSS
33,34,39,40,41,42,47,48,53,
54,59,60,65,66,71,72,77,78,
121,122,127,128,132,133,138,
139,144,145,149,150,155,156,
, 161,162,165,171,172,177,
178,183,184,187,190,193,196
Ground Plane
Power supplies for core, I/O, Serial Presence Detect,
and ground for the module.
Other Pins
114
119
ODT0
I
I
SSTL
SSTL
On-Die Termination Control 1:0
ODT1
On-Die Termination Control 1
Asserts on-die termination for DQ, DM, DQS, and
DQS signals if enabled via the DDR2 SDRAM mode
register.
Note:2 Rank modules
Not Connected
NC
NC
NC
NC
—
—
Note:1 Rank modules
50,69,83,84,120,163,168
Not connected
Pins not connected on Infineon SO-DIMMs
Table 7
Abbreviations for Pin Type
Abbreviation
Description
I
Standard input-only pin. Digital levels.
Output. Digital levels.
O
I/O
I/O is a bidirectional input/output signal.
Data Sheet
9
Rev. 1.1, 2005-06
02182004-HWZ1-64OM