MS82V48540-8 datasheet(7/44 Pages) OKI

Part #	MS82V48540-8

Description	393,216-Word 횞 32-Bit 횞 4-Bank FIFO-SGRAM

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FEDS82V48540-01

OKI Semiconductor

MS82V48540

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Read with Auto Prechaege Command (

CS, CAS = “Low”, RAS, WE, A10/AP = “High”)

The Read with Auto Precharge command is required to begin burst read operation with auto 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 - DQ31 in read or write.

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

respectively.

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

The Data Mask/Output Disable command disables DQ0 - 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 - DQ7, DQ8 - DQ15, DQ16 - DQ23 and DQ24 - DQ31

respectively.

Burst Stop Command (

CS, WE = “Low”, RAS, CAS = “High”)

The Burst Stop command stops burst access. After the Burst Stop command is entered, the output buffer goes into

high impedance state.

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