KM44L64131C-GY 데이터 시트보기 (PDF) - Samsung

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KM44L64131C-GY

DDR SDRAM Specification Version 0.61

Samsung 

128Mb DDR SDRAM

3. Functional Description

3.1 Simplified State Diagram

Target

SELF

REFRESH

REFS

MODE

REGISTER

SET

MRS

IDLE

REFSX

REFA

AUTO

REFRESH

CKEL

POWER

DOWN

CKEH

ACT

CKEL

POWER

DOWN

CKEH

WRITE

ROW

ACTIVE

BURST STOP

READ

WWRRITITEEA

WRITEA READA

READ

READ

POWER

APPLIED

WRITEA

WRITEA

READA

PRE

PRE

PRE

READA

READA

POWER

ON

PRE

PRE

CHARGE

Figure 3. State diagram

Automatic Sequence

Command Sequence

WRITEA : Write with autoprecharge

READA : Read with autoprecharge

- 13 of 63 -

REV. 0.61 August 9. '99

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