M66220 Ver la hoja de datos (PDF) - Mitsumi

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M66220

256 × 8-BIT MAIL-BOX

Mitsumi 

MITSUBISHI 〈DIGITAL ASSP〉

M66220SP/FP

Write Cycle

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

tCW

A0~A7

CS

WE

I/O0~I/O7

(DIN)

tsu(A)

tsu(A-WEH)

tsu(CS)

tw(WE)

trec(WE)

tsu(D)

th(D)

Data input determined

OE

I/O0~I/O7

(DOUT)

tdis(OE)

256 × 8-BIT MAIL-BOX

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

tCW

A0~A7

CS

tsu(A)

tsu(A-WEH)

tsu(CS)

trec(WE)

tw(WE)

WE

I/O0~I/O7

(DIN)

I/O0~I/O7

(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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