M38747 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M38747

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PIN DESCRIPTION

Table 1 Pin description (1)

Pin

VCC, VSS

VREF

AVSS

RESET

Name

Power source input

Reference voltage input

Analog power source

input

Reset input

XIN

Clock input

XOUT

Clock output

P00–P07

P10–P17

P20–P27

P30–P37

I/O port P0

I/O port P1

I/O port P2

I/O port P3

P40/XCOUT,

P41/XCIN

P42/INT1,

P43/INT2

P44/RXD,

P45/TXD,

P46/SCLK1,

P47/SRDY1

P50/TOUT

P51/INT3–

P53/INT5

P54/CNTR0,

P55/CNTR1

P56/RTP0,

P57/RTP1

I/O port P4

I/O port P5

Functions

Function except a port function

•Apply voltage of 3.0 V – 5.5 V to Vcc, and 0 V to Vss.

•Reference voltage input pin for A-D and D-A conver ters.

•Analog power source input pin for A-D and D-A converters.

•Connect to VSS.

•Reset input pin for active “L.”

•Input and output pins for the clock generating circuit.

•Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set

the oscillation frequency.

•When an external clock is used, connect the clock source to the XIN pin and leave the XOUT

pin open.

•Feedback resistor is built in between XIN pin and XOUT pin.

•8-bit CMOS I/O port.

•I/O direction register allows each pin to be individually programmed as either input or output.

•CMOS compatible input level.

•CMOS 3-state output structure.

•8-bit I/O port with the same function as port P0.

•CMOS compatible input level.

•CMOS 3-state output structure.

•Sub-clock generating circuit I/O

pins connect a resonator.

(This circuit cannot be operated by

an external clock.)

•Interrupt input pins

•Serial I/O1 function pins

•8-bit I/O port with the same function as port P0.

•CMOS compatible input level.

•CMOS 3-state output structure.

•Timer 2 output pin

•Interrupt input pins

•Timer X, timer Y function pins

•Real time port function pins

5

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