M38503M4-237SP datasheet(3/52 Pages) MITSUBISHI

Part #	M38503M4-237SP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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3 / 52 page

3

3850 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

VCC, VSS

PIN DESCRIPTION

Functions

Name

•Apply voltage of 2.7 V – 5.5 V to Vcc, and 0 V to Vss.

•This pin controls the operation mode of the chip.

•Normally connected 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.

•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.

•P13 to P17 (5 bits) are enabled to output large current for LED drive.

•8-bit CMOS I/O port.

Power source

Table 1 Pin description

Function except a port function

• Sub-clock generating circuit I/O

pins (connect a resonator)

Clock input

Clock output

I/O port P0

I/O port P1

I/O port P2

CNVSS input

CNVSS

RESET

Reset input

XIN

XOUT

P00–P07

P10–P17

P20/XCOUT

P21/XCIN

P22

P23

P24/RxD

P25/TxD

P26/SCLK

P27/CNTR0/

SRDY

P30/AN0–

P34/AN4

I/O port P3

I/O port P4

•I/O direction register allows each pin to be individually

programmed as either input or output.

•CMOS compatible input level.

•P20, P21, P24 to P27: CMOS3-state output structure.

•P22, P23: N-channel open-drain structure.

• Serial I/O function pin

• Serial I/O function pin/

Timer X function pin

• A-D converter input pin

• Timer Y function pin

• Interrupt input pins

• Interrupt input pin

• PWM output pin

P40/CNTR1

P41/INT0–

P43/INT2

P44/INT3/PWM

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

•CMOS compatible input level.

•CMOS 3-state output structure.

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

•CMOS compatible input level.

•CMOS 3-state output structure.

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M38503M4-237SP Datasheet(PDF) 3 Page - Mitsubishi Electric Semiconductor

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