Renesas PCA4738L-64A Technical Information PDF herunterladen (Seite 15)

MITSUBISHI MICROCOMPUTERS

3802 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Fig. 4 Port block diagram (single-chip mode) (1)

(1) Ports P0, P1, P2, P32–P37

Direction register

Data bus

Port latch

(2) Ports P30, P31

(3) Ports P40–P43, P57

Direction register

Data bus

Port latch

Serial I/O1 input

Serial I/O1 enable bit

Receive enable bit

(4) Port P44

(5) Port P45 (6) Port P46

Direction register

Data bus

Port latch

Serial I/O1 ready output

Serial I/O1 enable bit

RDY1 output enable bit

Serial I/O1 mode selection bit

(7) Port P47 (8) Port P50

Serial I/O2 input

Direction register

Data bus

Port latch

D–A conversion output

DA1 output enable bit (P30)

2 output enable bit (P31)

Direction register

Data bus

Port latch

Interrupt input

Direction register

Data bus

Port latch

Serial I/O1 output

Serial I/O1 enable bit

Transmit enable bit

P45/TXD P-channel output disable bit

Direction register

Data bus

Port latch

Serial I/O1 clock output

Serial I/O1 mode selection bit

Serial I/O1 enable bit

Serial I/O1 synchronous

clock selection bit

Serial I/O1

external

clock input

Direction register

Data bus

Port latch

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 53 54

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