3850 datasheet(11/53 Pages) RENESAS

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3850 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Fig. 8 Port block diagram (1)

(1) Port P0, P1

Direction

Data bus

Port latch

(2) Port P20

Port XC switch bit

Oscillator

Port P21

Data bus

Port latch

Direction

Port XC switch bit

(3) Port P21

Port XC switch bit

Data bus

Port latch

Direction

Sub-clock generating circuit input

(4) Port P22, P23

Data bus

Port latch

Direction

(5) Port P24

Data bus

Port latch

Direction

Serial I/O enable bit

Receive enable bit

Serial I/O input

(6) Port P25

Data bus

Port latch

Direction

Serial I/O enable bit

Transmit enable bit

Serial I/O output

(7) Port P26

Data bus

Port latch

Direction

Serial I/O enable bit

Serial I/O mode selection bit

Serial I/O clock

selection bit

(8) Port P27

P-channel output disable bit

Serial clock output

External clock input

Data bus

Port latch

Direction

Timer output

Serial I/O enable bit

SRDY output enable bit

Serial I/O mode selection bit

CNTR0 interrupt

input

Serial ready output

Pulse output mode

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