W942508CH Datasheet, PDF(30/47 Page) Winbond – 8M x 4 BANKS x 8 BIT DDR SDRAM

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W942508CH Datasheet, PDF (30/47 Pages) Winbond – 8M x 4 BANKS x 8 BIT DDR SDRAM

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W942508CH

Timing Waveforms, continued

10.3 Read Timing (Burst Length = 4)

CLK

tCH

tCL

tCK

CLK

CMD

tIS

tIH

READ

ADD

tIS tIH

Col

CAS latency=2

Hi-Z

DQS

Output

Hi-Z

(Data)

CAS latency=2.5

Hi-Z

DQS

Output

Hi-Z

(Data)

tRPRE

tDQSCK

tRPST

Preamble

tDQSQ

tQH

tDQSQ

tAC

tLZ

tRPE

QDA0

QDA1

tDQSCK

QDA2

tDQSCK

Postamble

tDQSQ

QDA3

tHZ

tDQSCK

tRPST

Preamble

tDQSQ

QDA0

tAC

tLZ

tQH

QDA1

tQH

tDQSQ

Postamble

tDQSQ

QDA2

QDA3

tHZ

Hi-Z

Note: The correspondence of LDQS, UDQS to DQ. ( W942516AH)

LDQS

UDQS

DQ0~7

DQ8~15

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