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M66256FP データシートの表示(PDF) - MITSUBISHI ELECTRIC

部品番号
コンポーネント説明
一致するリスト
M66256FP
Mitsubishi
MITSUBISHI ELECTRIC  Mitsubishi
M66256FP Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
MITSUBISHI DIGITAL ASSP
M66256FP
5120 × 8-BIT LINE MEMORY (FIFO)
• 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.
WCK
Dn
RCK
Qn
Cycle n
Cycle n+1
Cycle n+2
Cycle n+3
(n)
(n+1)
Cycle n–2
(n+2)
Cycle n–1
(n+3)
Cycle n
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>* over-
lap each other.
WCK
Cycle n <1>*
Cycle 0 <2>*
Cycle n <2>*
Dn
RCK
(n–1)<1>*
(n)<1>*
Cycle n <0>*
Qn
(n–1)<0>*
(n)<0>*
(00) <2>*
Cycle 0 <1>*
(n–1)<2>*
(n)<2>*
Cycle n <1>*
(0)<1>*
(n–1)<1>*
(n)<1>*
<0>*, <1>* and <2>* indicates a line value.
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