M66221FP 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

メーカー

M66221FP

256 x 9-BIT MAIL-BOX

MITSUBISHI ELECTRIC  

MITSUBISHI 〈DIGITAL ASSP〉

M66221SP/FP

256 × 9-BIT MAIL-BOX

Contention Read Cycle (WE = VIH, OE = VIL)

Contention read cycle No .1 (Address control) See Notes 10 and 11.

Address A

(Address B)

∗ Address matching

tAPS

Address B

(Address A)

Not Ready B

(Not Ready A)

∗

tNAA

I/O0B~I/O8B

(I/O0A~I/O8A)

tv(A)

Previous cycle data

∗ Address A = Address B

Address not matching

tNDA

tNO

Data output

determined

ta(A)

Contention read cycle No. 2 (CS control) See Notes 10 and 12.

Addresses

A&B

∗ Address matching

CSA

(CSB)

CSB

(CSA)

Not Ready B

(Not Ready A)

I/O0B~I/O8B

(I/O0A~I/O8A)

tAPS

tNAC

tNDC

ten(CS)

tNO

ta(CS)

∗ Address A = Address B

Notes 10: The Not Ready output of the first-in port holds “H”.

11: When CS is set to “L” before the address input is determined.

12: When the address input is determined before CS transition to “L”.

Data output determined

9

Share Link: