38C3 datasheet(13/63 Pages) RENESAS

13 / 63 page

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

38C3 Group

Fig. 10 Port block diagram (1)

(6)Port P44

Serial I/O input

(1)Ports P0, P1, P2

Segment output enable bit

Pull-down control

Segment output enable bit

Direction register

Data bus

Port latch

VL2/VL3

VL1/VSS

(5)Port P43

φ output control bit

(2)Port P3

Segment output enable bit

Pull-down control

Segment output enable bit

Data bus

Port latch

VL2/VL3

VL1/VSS

(4)Ports P41, P42, P52

Timer 1 output selection bit

Timer 3 output selection bit

Timer 6 output selection bit

Direction register

Pull-up control

Timer 1 output

Timer 3 output

Timer 6 output

(3)Port P40

Data bus

Serial I/O clock output

Serial I/O mode selection bit

Port latch

Direction register

Pull-up control

P-channel output disable bit

(Note)

Note : Port P0, P1 direction registers are only bit 0.

Data bus

Port latch

Direction register

Data bus

Pull-up control

Data bus

Port latch

Direction register

Pull-up control

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