W971GG8SB25I 查看數據表（PDF） - Winbond

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W971GG8SB25I

16M x 8 BANKS x 8 BIT DDR2 SDRAM

Winbond 

W971GG8SB

11.31 Clock frequency change in precharge Power Down mode

T0

T1

T2

T4

CLK

CLK

CMD

CKE

NOP

NOP

TX

TX+1

TY

TY+1

TY+2

TY+3

TY+4

Tz

NOP

NOP

DLL

RESET

NOP

Valid

ODT

tIS

tRP

tAOFD

Frequency change

Occurs here

tIS

tXP

200 Clocks

tIH

ODT is off during

DLL RESET

Minimum 2 clocks

required before

changing frequency

Stable new clock

before power down exit

- 85 -

Publication Release Date: Jan. 09, 2015

Revision: A01

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