EM639165TS-75 查看數據表（PDF） - Etron Technology

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EM639165TS-75

8Mega x 16bits SDRAM

Etron Technology 

EM639165

COMMAND TRUTH TABLE

COMMAND

Deselect

No Operation

Row Address Entry &

Bank Active

Single Bank Precharge

Precharge All Banks

Column Address Entry

&Write

Column Address Entry &

Write with Auto-Precharge

Column Address Entry

& Read

Column Address Entry &

Read with Auto-Precharge

Auto-Refresh

Self-Refresh Entry

Self-Refresh Exit

MNEMONIC CKE CKE /CS /RAS /CAS /WE BA0,1 A1 1 A1 0 A0-9

n-1 n

DESEL

H

X

HX

XX

X

X

X

X

NOP

H

X

L

H

H

H

X

X

X

X

ACT

H

X

L

L

HH

V

V

V

V

PRE

PREA

H

X

L

L

HL

V

X

L

X

H

X

L

L

HL

X

XHX

WRIT E

H

X

L

H

L

L

V

V

L

V

WRITE A

READ

HX

HX

LH

LH

L

L

V

LHV

VHV

V

L

V

READA

REFA

H

X

L

H

L

H

V

V

HV

H

H

L

L

L

H

X

XX

X

REFS

H

L

L

L

L

H

X

XX

X

REFSX

L

HHX

XX

X

XX

X

L

H

L

H

HH

X

XX

X

Burst Terminate

TBST

HX

L

HHL

XX

XX

Mode Register Set

MR S

H

X

L

L

L

L

L

L

L V*1

H=High Level, L=Low Level, V=Valid, X=Don't Care, n=CLK cycle number

NOTE: 1. A7-A9 =0, A0-A6 =Mode Address

Preliminary

5

Rev 1.0 Feb. 2001

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