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HYS64T128021EDL-25FB2 Datasheet(PDF) 10 Page - Qimonda AG |
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HYS64T128021EDL-25FB2 Datasheet(HTML) 10 Page - Qimonda AG |
10 / 79 page HYS64T[32/64/128]xxxEDL–[25F/…/3.7](–)B2 Small Outlined DDR2 SDRAM Modules Internet Data Sheet Rev. 1.13, 2007-10 10 08212006-PKYN-2H1B 10 DM0 I SSTL Data Mask Bus 7:0 The data write masks, associated with one data byte. In Write mode, DM operates as a byte mask by allowing input data to be written if it is LOW but blocks the write operation if it is HIGH. In Read mode, DM lines have no effect. 26 DM1 I SSTL 52 DM2 I SSTL 67 DM3 I SSTL 130 DM4 I SSTL 147 DM5 I SSTL 170 DM6 I SSTL 185 DM7 I SSTL EEPROM 197 SCL I CMOS Serial Bus Clock This signal is used to clock data into and out of the SPD EEPROM and Thermal sensor. 195 SDA I/O OD Serial Bus Data This is a bidirectional pin use to transfer data into and out of the SPD EEPROM and Thermal sensor. A resistor must be connected from SDA to V DDSPD on the motherboard to act as a pull-up. 198 SA0 I CMOS Serial Address Select Bus 2:0 Address pins used to select the SPD and Thermal sensor base address. 200 SA1 I CMOS 50 EVENT OOD EVENT The optional EVENT pin is reserved for use to flag critical module temperature and is used in conjunction with Thermal Sensor. NC - - Not Connected Not connected on modules without temperature sensors. Power Supplies 1 V REF AI — I/O Reference Voltage Reference voltage for the SSTL-18 inputs. 199 V DDSPD PWR — EEPROM Power Supply Power supplies for Serial Presence Detect, Thermal Sensor and ground for the module. 81,82,87,88,95,96,103,104, 111,112,117,118 V DD PWR — Power Supply Power supplies for core, I/O and ground for the module. 2,3,8,9,12,15,18,21,24,27,28, 33,34,39,40,41,42,47,48,53, 54,59,60,65,66,71,72,77,78, 121,122,127,128,132,133,138,13 9,144,145,149,150,155,156, 161,162,165,168,171,172,177, 178,183,184,187,190,193,196 V SS GND — Ground Plane Power supplies for core, I/O, Serial Presence Detect, Thermal Sensor and ground for the module. Other pins 114 ODT0 I SSTL On-Die Termination Control 1:0 Pin No. Name Pin Type Buffer Type Function |
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