UPD753012 datasheet(8/80 Pages) NEC

8 / 80 page

µPD753012, 753016, 753017

3. PIN FUNCTION

3.1 Port Pins (1/2)

Pin Name

Input/Output

Dual

Function

8-bit

At Reset

I/O Circuit

Function Pin

I/O

TYPE Note 1

P00

Input

INT4

Input

P01

Input/Output

SCK

F -A

P02

Input/Output

SO/SB0

F -B

P03

Input/Output

SI/SB1

M -C

P10

Input

INT0

input

B -C

P11

INT1

P12

TI1/TI2/INT2

P13

TI0

P20

Input/Output

PTO0

Input

E-B

P21

PTO1

P22

PCL/PTO2

P23

BUZ

P30

Input/Output

LCDCL

Input

E-B

P31

SYNC

P32

–

P33

–

P40-P43Note 2

Input/Output

–

M-D

P50-P53Note 2

Input/Output

–

M-D

Notes 1.

Circled characters indicate the Schmitt-trigger input.

If on-chip pull-up resistors are not specified by mask option (when used as N-ch open-drain input port),

low level input leakage current increases when input or bit manipulation instruction is executed.

4-bit input port (PORT0).

For P01 to P03, on-chip pull-up resistors

can be specified in software in 3-bit units.

4-bit input port (PORT1).

On-chip pull-up resistors can be specified

in software in 4-bit units.

Noise eliminator can be selected (Only

P10/INT0)

4-bit input/output port (PORT2).

On-chip pull-up resistors can be specified

in software in 4-bit units.

Programmable 4-bit input/output port

(PORT3).

This port can be specified input/output in

bit units.

On-chip pull-up resistor can be specified in

software in 4-bit units.

N-ch open-drain 4-bit input/output port

(PORT4).

A pull-up resistor can be contained bit-wise

(mask option).

Withstand voltage is 13 V in open-drain mode.

N-ch open-drain 4-bit input/output port

(PORT5).

A pull-up resistor can be contained bit-wise

(mask option).

Withstand voltage is 13 V in open-drain mode.

High level

(when pull-up

resistors are

contained) or

high

impedance

High level

(when pull-up

resistors are

provided) or

high

impedance

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