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ADQVD1A08_DDR2-800+(CL4)_1GB(128Mx8_Pb free) Rev.1 2008/09/17 Page 3 of 6
Pin Description
PIN NAME FUNCTION
CK0~CK2,
/CK0~/CK2
System Clock Active on the positive and negative edge to sample all inputs.
CKE0 Clock Enable
Masks system clock to freeze operation from the next clock cycle. CKE should be enabled at
least on cycle prior new command. Disable input buffers for power down in standby
/S0 Chip Select
Disables or Enables device operation by masking or enabling all input except CK, CKE and
L(U)DQM
A0~A13 Address
Row / Column address are multiplexed on the same pins.
(Row Address
A0~A13 , Column Address :A0~A9 , Auto precharge A10/AP)
BA0~BA2 Banks Select
Selects bank to be activated during row address latch time.
Selects bank for read / write during column address latch time.
DQ0~DQ63 Data Data and check bit inputs / outputs are multiplexed on the same pins.
DQS0~DQS7,
/DQS0~/DQS7
Data Strobe Bi-directional Data Strobe
DM0~DM7 Data Mask Mask input data when DM is high.
/RAS Row Address Strobe Latches row addresses on the positive edge of the CK with /RAS low
/CAS Column Address Strobe
Latches Column addresses on the positive edge of the CK with /CAS low
/WE Write Enable Enables write operation and row recharge.
VDD / VSS Power Supply/Ground
Power and Ground for the input buffers and the core logic.
VREF Power Supply reference
Power Supply for reference
VDDSPD SPD Power Supply Serial EEPROM power Supply
SDA Serial data I/O EEPROM serial data I/O
SCL Serial clock EEPROM clock input
SA0~SA2 Address in EEPROM EEPROM address input
ODT0 On Die Termination
When high, termination re
sistance is enabled for all DQ, /DQ and DM pins, assuming the
function is enabled in the Extended Mode Register Set.
NC No Connection This pin is recommended to be left No Connection on the device.
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