HM5225165B-75 View Datasheet(PDF) - Elpida Memory, Inc

Part Name

Description

Manufacturer

HM5225165B-75

256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword × 16-bit × 4-bank/8-Mword × 8-bit × 4-bank/16-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM

Elpida Memory, Inc 

HM5225165B/HM5225805B/HM5225405B-75/A6/B6

Simplified State Diagram

SELF

REFRESH

SR ENTRY

SR EXIT

MODE

REGISTER

SET

MRS

IDLE

REFRESH

*1

AUTO

REFRESH

CKE

CKE_

ACTIVE

CLOCK

SUSPEND

CKE

CKE_

ACTIVE

ROW

ACTIVE

IDLE

POWER

DOWN

Write

WRITE

CKE_

WRITE

SUSPEND

CKE

WRITE

WRITE

WITH AP

WRITE

WITH

AP

READ

READ

WITH AP

READ

WITH

AP

READ

Read

CKE_

WRITE

WRITE

WITH AP

READ

CKE

READ

WITH AP

READ

SUSPEND

CKE_

WRITEA

SUSPEND

CKE

WRITEA

PRECHARGE

READA

PRECHARGE PRECHARGE

CKE_

READA

SUSPEND

CKE

POWER

APPLIED

POWER

PRECHARGE

ON

PRECHARGE

Automatic transition after completion of command.

Transition resulting from command input.

Note: 1. After the auto-refresh operation, precharge operation is performed automatically and

enter the IDLE state.

Data Sheet E0082H10

19

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