M3885 datasheet(16/103 Pages) RENESAS

16 / 103 page

3885 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Fig. 10 Port block diagram (1)

(1) Ports P0, P1

Data bus

Port latch

P00–P03,

P04–P07,

P10–P13,

P14–P17 output structure

selection bits

Direction

(2) Port P20

Data bus

Port latch

Comparator reference power source input

Comparator reference input

pin select bit

(3) Port P21–P27

Data bus

Port latch

Direction

(4) Ports P30, P31

Comparator input

Key-on wake-up input

P30–P33 pull-up control bit

Data bus

Port latch

PWM00 (PWM10) output

PWM0 (PWM1) output pin selection bit

PWM0(PWM1) enable bit

Direction

(7) Port P41

Sub-clock oscillation circuit

Port XC switch bit

Data bus

Port latch

Direction

Port XC switch bit

(6) Port P40

Port XC switch bit

Sub-clock oscillation circuit

Port P41

Data bus

Port latch

Direction

(5) Ports P32–P37

P30–P33,

P34–P37 pull-up control bit

Data bus

Port latch

Direction

✻1. Reading the port P8 register (address 001016) is switched to port P4 pin input level by the P8 function selection bit of the port control

(8) Ports P42 , P43

P4 output structure selection bit

Data bus

Port latch

✻1

Direction

Interrupt input

Comparator input

Key-on wake-up input

Direction

M3885 Datasheet(PDF) 16 Page - Renesas Technology Corp

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