W9425G8EH Datasheet, PDF(49/53 Page) Winbond – 8M × 4 BANKS × 8 BITS DDR SDRAM

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W9425G8EH Datasheet, PDF (49/53 Pages) Winbond – 8M × 4 BANKS × 8 BITS DDR SDRAM

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W9425G8EH

11.21 4 Bank Interleave Read Operation (CL = 2, BL = 2)

CLK

CMD

ACTa

tRRD

tR R D

ACTb

tRCD(a)

tRAS(a)

tRC(a)

tRRD

ACTc READAa ACTd READAb ACTa READAc

tRCD(b)

tRAS(b)

tRP

tRCD(c)

tRAS(c)

tRCD(d)

tRAS(d)

DQS

P ream ble

CL(a)

Postamble Preamble

CL(b)

Q0a Q1a

Q0b Q1b

ACTa/b/c/d : Bank Act. CMD of bank a/b/c/d

READAa/b/c/d : Read with Auto Pre.CMD of bank a/b/c/d

APa/b/c/d

: Auto Pre. of bank a/b/c/d

APa

APb

11.22 4 Bank Interleave Read Operation (CL = 2, BL = 4)

CLK

CMD

ACTa

tR R D

tR C (a)

tR R D

ACTb

READAa

tR C D (a)

tR A S (a )

ACTc

READAb

ACTd

READAc

ACTa

tR C D (b)

tR A S (b )

tR C D (c)

tR AS(c)

tR P(a)

tR C D (d)

tR A S (d )

READAd

DQS

P ream ble

C L(a)

C L(b)

C L (c)

Q0a Q1a Q0a Q1a Q2a Q3a Q0b Q1b Q2b Q3b

AC Ta/b/c/d : Bank Act. C M D of bank a/b/c/d

R E A D A a/b/c/d : R ead w ith A uto P re.C M D of bank a/b/c/d

A P a /b /c/d

: Auto Pre. of bank a/b/c/d

APa

APb

APc

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Publication Release Date: Jul. 04, 2008

Revision A01

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