21 cke/dqm input timing (write cycle) – Rainbow Electronics W9864G2GH User Manual

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W9864G2GH

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Operating Timing Example, continued

14.21 CKE/DQM Input Timing (Write Cycle)

7

6

5

4

3

2

1

CKE MASK

( 1 )

D1

D6

D5

D3

D2

CLK cycle No.

External

Internal

CKE

DQM

DQ

7

6

5

4

3

2

1

( 2 )

D1

D6

D5

D3

D2

CLK cycle No.

External

Internal

CKE

DQM

DQ

7

6

5

4

3

2

1

( 3 )

D1

D6

D5

D4

D3

D2

CLK cycle No.

External

CKE

DQM

DQ

DQM MASK

DQM MASK

CKE MASK

CKE MASK

Internal

CLK

CLK

CLK