M66256FP 参数 Datasheet PDF下载

M66256FP

Shortest Read of Data "n" Written in Cycle n

(Cycle n

−

1 on read side should be started after end of cycle n + 1 on write side)

When the start of cycle n

−

1 on read side is earlier than the end of cycle n + 1 on write side, output Qn of cycle n

becomes invalid.

In the figure shown below, the read of cycle n

−

1 is invalid.

Cycle n

Cycle n

+

1

Cycle n

+

2

Cycle n

+

3

WCK

Dn

(n)

(n + 1)

(n + 2)

(n + 3)

Cycle n

−

2

Cycle n

−

1

Cycle n

RCK

Qn

Invalid

(n)

Longest Read of Data "n" Written in Cycle n: 1-line Delay

(Cycle n <1>* on read side should be started when cycle n <2>* on write is started)

Output Qn of n cycle <1>* can be read until the start of reading side n cycle <1>* and the start of writing side n cycle

<2>* overlap each other.

Cycle n <1>*

Cycle 0 <2>*

Cycle n <2>*

WCK

Dn

(n

−

1) <1>*

Cycle n <0>*

(n) <1>*

(00) <2>*

(n

−

1) <2>*

(n) <2>*

Cycle 0 <1>*

Cycle n <1>*

RCK

Qn

(n

−

1) <0>*

(n) <0>*

(0) <1>*

(n

−

1) <1>*

(n) <1>*

Note: <0>*, <1>* and <2>* indicates a line value.

REJ03F0250-0200 Rev.2.00 Sep 14, 2007

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