M38749M 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M38749M

Single-chip 8-bit CMOS microcomputer. ROM 61440 bytes, RAM 2048 bytes. Mask ROM version.

MITSUBISHI ELECTRIC  

(7) Port P45

P45/TXD P-channel output disable bit

Serial I/O1 enable bit

Transmit enable bit

Direction register

TXD pull-up

Data bus

Port latch

Serial I/O1 output

(9) Port P47

Serial I/O1 mode selection bit

Serial I/O1 enable bit

SRDY1 output enable bit

Direction register

Data bus

Port latch

Serial I/O1 ready output

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

(8) Port P46

Serial I/O1 synchronous

clock selection bit

Serial I/O1 enable bit

Serial I/O1 mode selection bit

Serial I/O1 enable bit

Direction register

SCLK1 pull-up

Data bus

Port latch

Serial I/O1 clock output

Serial I/O1 clock input

(10) Port P50

Direction register

Data bus

Port latch

TOUT output control bit

Timer output

(11) Port P54

Direction register

Data bus

Port latch

Pulse output mode

Timer output

CNTR0 interrupt input

Event count input

Pulse width measurement gate input

Fig. 13 Port block diagram (2)

18

(12) Port P55

Direction register

Data bus

Port latch

CNTR1 interrupt input

Event count input

Reload input

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