UPD780138 datasheet(37/558 Pages) NEC

Part #	UPD780138

Description	8-Bit Single-Chip Microcontrollers

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Manufacturer	NEC [NEC]

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CHAPTER 2 PIN FUNCTIONS

User’s Manual U16228EJ2V0UD

37

(1) Port pins (2/2)

Pin Name

I/O

Function

After Reset

Alternate Function

P40 to P43

I/O

Port 4.

4-bit I/O port.

Input/output can be specified in 1-bit units.

Use of an on-chip pull-up resistor can be specified by a

software setting.

Input

−

P50 to P53

I/O

Port 5.

4-bit I/O port.

Input/output can be specified in 1-bit units.

Use of an on-chip pull-up resistor can be specified by a

software setting.

Input

−

P60 to P63

I/O

Port 6.

4-bit I/O port (N-ch open drain).

Input/output can be specified in 1-bit units.

Use of an on-chip pull-up resistor can be specified by a mask

option only for mask ROM versions.

Input

−

P70 to P77

I/O

Port 7.

8-bit I/O port.

Input/output can be specified in 1-bit units.

Use of an on-chip pull-up resistor can be specified by a

software setting.

Input

KR0 to KR7

P120

I/O

Port 12.

1-bit I/O port.

Use of an on-chip pull-up resistor can be specified by a

software setting.

Input

INTP0

P130

Output

Port 13.

1-bit output-only port.

Output

−

P140

PCL/INTP6

P141

I/O

Port 14.

2-bit I/O port.

Input/output can be specified in 1-bit units.

Use of an on-chip pull-up resistor can be specified by a

software setting.

Input

BUZ/INTP7

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UPD780138 Datasheet(PDF) 37 Page - NEC

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