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