Hynix HMT325U7CFR8C-PBT0 사용자 설명서

DQS0–DQS8
DQS0–DQS8

SSTL

Differential 

crossing

Data strobe for input and output data.

SA0–SA2

—

These signals are tied at the system planar to either V

SS

 or V

DDSPD

 to con-

figure the serial SPD EEPROM address range.

SDA

—

This bidirectional pin is used to transfer data into or out of the SPD 
EEPROM. An external resistor may be connected from the SDA bus line to 
V

DDSPD

 to act as a pullup on the system board.

SCL

—

This signal is used to clock data into and out of the SPD EEPROM. An 
external resistor may be connected from the SCL bus time to V

DDSPD

 to act 

as a pullup on the system board.

V

DDSPD

Supply

Power supply for SPD EEPROM. This supply is separate from the V

DD

/V

DD

Q 

power plane. EEPROM supply is operable from 3.0V to 3.6V.