UPD750064CU datasheet(8/82 Pages) NEC

8 / 82 page

µPD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)

Data Sheet U10165EJ2V0DS00

3. PIN FUNCTION

3.1 Port Pins (1/2)

Pin Name

Input/Output

Alternate

Function

8-bit

After Reset

I/O Circuit

Function

I/O

TypeNote 1

P00

Input

INT4

Input

<B>

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/INT2

P13

TI0

P20

Input/Output

PTO0

Input

E-B

P21

PTO1

P22

PCL

P23

BUZ

P30 to P33

Input/Output

–

Input

E-B

P40 to P43Note 2

Input/Output

–

Yes

M-D

P50 to P53Note 2

Input/Output

–

M-D

Notes 1.

Circuit types enclosed in brackets 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.

High level

(when pull-up

resistors are

provided) or

high-

impedance

4-bit input port (PORT0).

For P01 to P03, connection of on-chip pull-

up resistors can be specified by software in

3-bit units.

4-bit input port (PORT1).

Connection of on-chip pull-up resistors can

be specified by software in 4-bit units.

P10/INT0 can select noise elimination circuit.

4-bit input/output port (PORT2).

Connection of on-chip pull-up resistors can

be specified by software in 4-bit units.

Programmable 4-bit input/output port (PORT3).

This port can be specified for input/output in

1-bit units.

Connection of on-chip pull-up resistor can be

specified by software in 4-bit units.

N-ch open-drain 4-bit input/output port (PORT4).

A pull-up resistor can be contained in 1-bit

units (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 in 1-bit

units (mask option).

Withstand voltage is 13 V in open-drain

mode.

High level

(when pull-up

resistors are

provided) or

high-

impedance

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