Internet Data Sheet
HYS72T[32/64]0xxHR–[2.5/3/3S/3.7/5]–A
Registered DDR2 SDRAM Modules
Ball No.
Other Pins
Name
Pin
Type
NC
Buffer
Type
—
Function
NC
19, 55, 68, 102,
137, 138, 173, 220,
221
195
77
ODT0
ODT1
NC
Not connected
I
I
NC
SSTL
SSTL
—
On-Die Termination Control 1:0
Note: 2-Ranks module
Note: 1-Rank modules
TABLE 7
Abbreviations for Buffer Type
Abbreviation
SSTL
CMOS
OD
Description
Serial Stub Terminated Logic (SSTL_18)
CMOS Levels
Open Drain. The corresponding pin has 2 operational states, active low and tristate,
and allows multiple devices to share as a wire-OR.
TABLE 8
Abbreviations for Pin Type
Abbreviation
I
O
I/O
AI
PWR
GND
NU
NC
Description
Standard input-only pin. Digital levels.
Output. Digital levels.
I/O is a bidirectional input/output signal.
Input. Analog levels.
Power
Ground
Not Usable
Not Connected
Rev. 1.21, 2007-03
09152006-J5FK-C565
13