M38B50E1-059FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M38B50E1-059FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

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MITSUBISHI MICROCOMPUTERS

38B5 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

(1) Ports P0, P21–P27, P80–P83

FLD/Port

switch register

Local data

bus

Data bus

Dimmer signal (Note 1)

Direction register

Port latch

*

read

(2) Ports P1, P3

Local data

bus

Data bus

Dimmer signal (Note 1)

Port latch

(3) Port P20

FLD/Port

switch register

Local data

bus

Data bus

Dimmer signal (Note 1)

Direction register

Port latch

(Note 2)

VEE

(4) Ports P40–P42, P60

Buzzer control signal

Buzzer signal output

Direction register

Data bus

*

Port latch

(5) Port P43

read

(Note 2)

INT0,INT1,INT3 interrupt input

CNTR1 input

Timer 4 external clock input

VEE

Buzzer control signal

Buzzer signal output

(6) Port P44

Timer 6 output selection bit

Direction register

Direction register

Data bus

Port latch

Data bus

Port latch

*

VEE

(7) Ports P45, P46

Timer 1 output bit

Timer 3 output bit

Direction register

Data bus

Port latch

Timer 1 output

Timer 3 output

Fig. 9 Port Block Diagram (1)

Timer 6 output

(8) Port P47

Data bus

INT2 interrupt

input

* High-breakdown-voltage P-channel transistor

Notes 1: The dimmer signal sets the Toff timing.

2: A pull-down resistor is not built in to ports P2 and P8.

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