M38197 Ver la hoja de datos (PDF) - MITSUBISHI ELECTRIC

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M38197

SINGLE-CHIP 8-BIT MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3819 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

(1) Ports P0, P10, P11

Shift signal from previous stage

S/D switch register

Blanking signal

for key-scan

Data bus

Local data bus

Dimmer signal

(Note)

Port latch

(2) Ports P12–P17

Shift signal to next stage

Shift signal from previous stage

Dimmer signal

(Note)

Data bus

Port latch

V

VEE

V

(3) Ports P20–P23

Shift signal to next stage

Shift signal from previous stage

D/P switch register

Data bus

Dimmer signal

(Note)

Port latch

Blanking signal

for key-scan

Shift signal to next stage

(4) Ports P24–P27, P41, P60, PB3

Data bus

Direction

register

Port latch

VEE

V

VEE

V : High-breakdown-voltage P-channel transistor

Note: The dimmer signal sets the Toff timing.

Fig. UA-2 Port block diagram (1)

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