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M37640E8FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

Ver 1.4

MITSUBISHI MICROCOMPUTERS

7640 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Read

A0

S0, S1

R

tsu(A-_R_)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

tsu(S-R)

0.2Vcc (0.8V)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

tw(R)

th(_R_-A)

th(R-S)

DQ0-DQ7

OBF

ta(R-D)

0.8Vcc

0.2Vcc

tv(R-D__)

0.8Vcc

0.2Vcc

tv(R-OBF)

0.2Vcc

Write

A0

S0, S1

W

DQ0-DQ7

IBF

tsu(A-W)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

tsu(S-W)

0.2Vcc (0.8V)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

tw(W)

th(W-A)

th(W-S)

tsu(D-W)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

th(W-D)

td(W-IBF)

0.2Vcc

Note: TTL input levels in parenthesis (TTL levels selected when PTC7 = “1”)

Fig. 2.2. MBI Timing Diagram (Separate R and W Type Mode)

E

A0

R/W

S0, S1

Read

DQ0-DQ7

Write

DQ0-DQ7

tw(E-E)

0.2Vcc (0.8V)

tsu(A-E)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

tsu(S-E)

0.2Vcc (0.8V)

tw(E)

ta(E-D)

0.8Vcc

0.2Vcc

tsu(E-D)

0.8Vcc (2.0V)

0.2Vcc (0.8V)

OBF, IBF

Fig. 2.3. MBI Timing Diagram (R/W Type Mode)

86

th(E-A)

th(E-R_W_ )

th(E-S)

tv(E-D)

th(E-D)

tv(E-OBF)

td(E-IBF)

0.2Vcc

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