M38747MCT-XXXG View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38747MCT-XXXG

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

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

I/O PORTS

The I/O ports P0–P8 have direction registers which determine the

input/output direction of each individual pin. Each bit in a direction

register corresponds to one pin, and each pin can be set to be in-

put 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.

Table 5 I/O port function (1)

Pin

Name

P00–P07

Port P0

Input/Output

Input/output,

individual bits

P10–P17

Por t P1

Input/output,

individual bits

P20–P27

Port P2

Input/output,

individual bits

P30–P37

Port P3

P40/XCOUT

P41/XCIN

P42/INT1,

P43/INT2

P44/RXD

P45/TXD

P46/SCLK1

P47/SRDY1

P50/TOUT

Port P4

Por t P5

P51/INT3,

P52/INT4,

P53/INT5

P54/CNTR0

P55/CNTR1

P56/RTP0

P57/RTP1

P60/AN0–

P67/AN7

Port P6

Input/output,

individual bits

Input/output,

individual bits

Input/output,

individual bits

Input/output,

individual bits

I/O Structure

•CMOS compatible

input level

•CMOS 3-state output

Non-Port Function

Related SFRs

Ref.No.

(1)

•CMOS compatible

input level

•CMOS 3-state output

•CMOS compatible

• K ey i n p u t ( k ey - o n •PULL UP register

(2)

input level

wake-up) interrupt in-

•CMOS 3-state output put

•CMOS compatible

input level

•CMOS 3-state output

•CPU mode register

(1)

•CMOS compatible

•Sub-clock generating •CPU mode register

(3)

input level

circuit I/O

(4)

•CMOS 3-state output •External interrupt input •Interrupt edge selection (5)

register

•Serial I/O1 function I/O •Serial I/O1 control reg- (6)

ister

•Serial I/O1 status regis-

(7)

ter

(8)

•UART control register

•PULL UP register

(9)

•CMOS compatible

•Timer 2 output

•Timer 123 mode regis- (10)

input level

ter

•CMOS 3-state output •External interrupt input •Interrupt edge selection

(5)

register

•Timer X function I/O

•Timer X mode register

(11)

•Timer Y function I/O

•Timer Y mode register

(12)

•Real time port function •Timer X mode register

output

(13)

•Real time port function •Timer Y mode register

output

•CMOS compatible

•A-D converter input

•A-D control register

(14)

input level

•CMOS 3-state output

14

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