3820 datasheet(33/349 Pages) RENESAS

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3820 GROUP USER’S MANUAL

1-16

MITSUBISHI MICROCOMPUTERS

3820 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Fig. 12 Port block diagram (1)

(3)Ports P30–P37

VL2/VL3

VL1/VSS

(1)Ports P0,P1

Segment output enable bit

VL2/VL3

VL1/VSS

(Note)

(5)Port P41

Data bus

Pull-down

control

Segment output enable bit

Data bus

Direction register

Port latch

Pull-down control

Segment output enable bit

Note. Bit 0 of port P0 direction register and

port P1 direction register.

output control bit

Direction register

Pull-up control

Data bus

Port latch

Direction register

Pull-up control

Data bus

Port latch

Direction register

Pull-up control

Data bus

Port latch

(7)Port P45

Serial I/O1 output

Serial I/O1 enable bit

Transmission enable bit

VL2/VL3

P45/TXD P-channel output disable bit

(6)Port P44

(4)Port P40

(2)Ports P2,P42,P43,P57

Direction register

Data bus

Port latch

Pull-up control

Key input (Key-on wake up) interrupt input

INT0–INT2 interrupt input

Pull-up control

Reception enable bit

Serial I/O1 enable bit

Serial I/O1 input

Data bus

Port latch

Data bus

(8)Port P46

Serial I/O1 clock input

Direction register

Pull-up control

Data bus

Port latch

Serial I/O1 clock output

Serial I/O1 mode selection bit

Serial I/O1 enable bit

Serial I/O1 synchronization clock

selection bit

Serial I/O1 enable bit

3820 Datasheet(PDF) 33 Page - Renesas Technology Corp

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