M66221FP データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M66221FP

256 x 9-BIT MAIL-BOX

MITSUBISHI ELECTRIC  

MITSUBISHI 〈DIGITAL ASSP〉

M66221SP/FP

Write Cycle

Write cycle No. 1 (WE control) See Notes 6, 7 and 8.

tCW

A0~A7

CS

WE

I/O0~I/O8

(DIN)

tsu(A)

tsu(A-WEH)

tsu(CS)

tw(WE)

trec(WE)

tsu(D)

th(D)

Data input determined

OE

I/O0~I/O8

(DOUT)

tdis(OE)

256 × 9-BIT MAIL-BOX

Write cycle No. 2 (CS control) See Notes 6, 7 and 8.

tCW

A0~A7

tsu(A)

tsu(A-WEH)

tsu(CS)

CS

tw(WE)

trec(WE)

WE

I/O0~I/O8

(DIN)

I/O0~I/O8

(DOUT)

ten(CS)

tdis(WE)

tsu(D) th(D)

Data input

determined

Notes 6: The WE of the port must be set to “H” when an address input changes.

7: A write operation is performed during the overlap period when both CS and WE are “L”.

8: Do not apply any negative-phase signal from outside when an I/O pin is in output state.

9: The shaded part means a state in which a signal can be “H” or “L”.

8

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