W9412G6JH-5 datasheet(50/53 Pages) WINBOND | Double Data Rate architecture; two data transfers per clock cycle

Part No.	W9412G6JH-5

Description	Double Data Rate architecture; two data transfers per clock cycle

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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50 / 53 page

W9412G6JH

Publication Release Date: Nov. 29, 2011

- 50 -

Revision A03

11.23 Auto Refresh Cycle

CMD

CLK

PREA

AREF

CMD

NOP

tRP

tRFC

Note:

CKE has to be kept “High” level for Auto-Refresh cycle.

11.24 Precharged/Active Power Down Mode Entry and Exit Timing

CMD

CLK

NOP

CMD

NOP

Exit

Entry

CMD

NOP

tIH

tIS

tCK

tIH

tIS

CKE

Precharge/Activate

Note 1,2

Note:

1. If power down occurs when all banks are idle, this mode is referred to as precharge power down.

2. If power down occurs when there is a row active in any bank, this mode is referred to as active power down.

11.25 Input Clock Frequency Change during Precharge Power Down Mode Timing

NOP

DLL

RESET

NOP

CMD

200 clocks

tIS

Frequency Change

Occurs here

Minmum 2 clocks

required before

changing frequency

Stable new clock

before power down exit

CLK

CMD

CKE

tRP

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W9412G6JH-5 Datasheet(PDF) 50 Page - Winbond

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