IS42S32800 datasheet(10/62 Pages) ISSI

Part #	IS42S32800

Description	Concurrent auto precharge

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

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Integrated Silicon Solution, Inc. — www.issi.com

Rev. A

12/19/07

IS42S32800

READ A

NOP

WRITE B

NOP

DQM

COMMAND

DQ’s

NOP

DOUT A

DINB 2

DINB 1

DINB 0

Must be Hi-Z before

the Write Command

: "H" or "L"

CLK

T0

T2

T1

T3

T4

T5

T6

T7

T8

CLK

DQM

COMMAND

NOP

BANKA

ACTIVAT E

DIN A0

DIN A1

DIN A2

DIN A3

1 Clk Interval

CAS# latency=2

READ A

WRITEA

: "H" or "L"

NOP

T0

T2

T1

T3

T4

T5

T6

T7

T8

tCK2, DQs

CLK

DQM

COMMAND

NOP

READ A

NOP

DIN B0

DIN B1

DIN B2

DIN B3

CAS# latency=2

NOP

: "H" or "L"

tCK2, DQ’s

T0

T2

T1

T3

T4

T5

T6

T7

T8

WRITEB

tCK2, DQs

Read to Write Interval (Burst Length = 4,CAS#Latency =3)

Read to Write Interval (Burst Length = 4,CAS#Latency =2)

A read burst without the auto precharge function may be interrupted by a BankPrecharge/

PrechargeAll command to the same bank.The following figure shows the optimum time that

BankPrecharge/PrechargeAll command is issued in different CAS#latency.

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IS42S32800 Datasheet(PDF) 10 Page - Integrated Silicon Solution, Inc

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