M38503M4-263FP datasheet(9/52 Pages) MITSUBISHI

Part #	M38503M4-263FP

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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9

3850 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Name

Input/Output

I/O Structure

Non-Port Function

Ref.No.

Table 3 I/O port function

Related SFRs

I/O PORTS

The I/O ports have direction registers which determine the input/

output direction of each individual pin. Each bit in a direction reg-

ister corresponds to one pin, and each pin can be set to be input

port or output port.

When “0” is written to the bit corresponding to a pin, that pin be-

comes an input pin. When “1” is written to that bit, that pin

becomes an output pin.

If data is read from a pin which is set to output, the value of the

port output latch is read, not the value of the pin itself. Pins set to

input are floating. If a pin set to input is written to, only the port

output latch is written to and the pin remains floating.

Port P0

Port P1

Port P3

Input/output,

individual

bits

CMOS compatible

input level

CMOS 3-state output

Sub-clock generating

circuit

CPU mode register

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

P00–P07

P10–P17

P20/XCOUT

P21/XCIN

P22

P23

P24/RxD

P25/TxD

Port P2

P26/SCLK

P27/CNTR0/SRDY

P30/AN0–

P34/AN4

P40/CNTR1

P41/INT0–

P43/INT2

P44/INT3/PWM

Port P4

CMOS compatible

input level

N-channel open-drain

output

Serial I/O function I/O

Timer X function I/O

A-D conversion input

Serial I/O control

register

Serial I/O control

register

Serial I/O control

register

Timer XY mode register

A-D control register

Timer Y function I/O

External interrupt input

PWM output

Timer XY mode register

Interrupt edge selection

register

Interrupt edge selection

register

PWM control register

CMOS compatible

input level

CMOS 3-state output

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M38503M4-263FP Datasheet(PDF) 9 Page - Mitsubishi Electric Semiconductor

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