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Figure 7-9, Ddr read timing measurement points, Figure 7-9 "ddr read timing mea – AMD Geode LX [email protected] User Manual

Page 616

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616

AMD Geode™ LX Processors Data Book

Electrical Specifications

33234H

Figure 7-9. DDR Read Timing Measurement Points

DQ Inputs

V

REF

DQ

t

V

REF

DQ

t-1

SDCLK0

DQS ‘Late’ Input

V

REF

other DQS Input

V

REF

DQ

t+1

DQ

t+2

DQS[n] Input

V

REF

t

SKEW2

t

DQSCK

Max

DQS ‘Early’ Input

V

REF

t

DQSCK

Min

t

SKEW2

-t

DQSQs

t

DQSQh

associated with DQS[n]

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