FEDS82V16520A-01

OKI Semiconductor

MS82V16520A

6/40

Read with Auto Precharge Command (

CS, CAS = “Low”, RAS, WE, A9 = “High”)

The Read with Auto Precharge command is required to begin burst read operation with automatic precharge after

the burst read. Any command that interrupts this operation cannot be issued.

No Operation Command (

CS = “Low”, RAS, CAS, WE = “High”)

The No Operation command does not trigger any operation.

Device Deselect Command (

CS = “High”)

The Device Deselect command disables the

RAS, CAS, WE and Address input. This command does not trigger

any operation.

Data Write/Output Enable Command (DQMi = “Low”)

The Data Write/Output Enable command enables DQ0 to DQ31 in read or write.

The each DQM0, 1, 2 and 3 corresponds to DQ0 to DQ7, DQ8 to DQ15, DQ16 to DQ23 and DQ24 to DQ31

respectively.

Data Mask/Output Disable Command (DQMi = “High”)

The Data Mask/Output Disable command disables DQ0 to DQ31 in read or write. In read cycle output buffers are

disabled after 2 clocks . In write cycle input buffers are disabled at the same clock. The each DQM0, 1, 2 and 3

corresponds to DQ0 to DQ7, DQ8 to DQ15, DQ16 to DQ23 and DQ24 to DQ31 respectively.

Burst Stop Command (

CS, WE = “Low”, RAS, CAS = “High”)

The Burst Stop command stops burst access when the access is in full page. After the Burst Stop command is

entered, the output buffer goes into high impedance state.