UPD75104 datasheet(9/70 Pages) NEC

Part #	UPD75104

Description	4-BIT SINGLE-CHIP MICROCOMPUTER

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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9 / 70 page

µPD75104, 75106, 75108

9

3.

PIN FUNCTIONS

3.1

PORT PINS

I/O

Pin Name

I/O

Shared with:

Function

At Reset

Circuit

TYPE*1

P00

Input

INT4

B

P01

I/O

SCK

F

4-bit input port (PORT 0)

Input

P02

I/O

SO

E

P03

Input

SI

B

x

P10

INT0

P11

INT1

Input

4-bit input port (PORT 1)

Input

B

P12

INT2

P13

INT3

P20*3

PTO0

P21*3

PTO1

I/O

4-bit I/O port (PORT 2)

Input

E

P22*3

PCL

x

P23*3

—

4-bit programmable I/O port (PORT 3)

P30-P33*3

I/O

—

Input

E

Can be specified for input or output bitwise.

P40-P43*3

I/O

—

4-bit I/O port (PORT 4)

Input

E

o

P50-P53*3

I/O

—

4-bit I/O port (PORT 5)

Input

E

4-bit programmable I/O port (PORT 6)

P60-P63*3

I/O

—

Input

E

Can be specified for input or output bitwise.

o

P70-P73*3

I/O

4-bit I/O port (PORT 7)

Input

E

P80-P83*3

I/O

—

4-bit I/O port (PORT 8)

Input

E

o

P90-P93*3

I/O

—

4-bit I/O port (PORT 9)

Input

E

4-bit N-ch open-drain I/O port (PORT 12)

Built-in pull-up resistors can be specified in bit

P120-P123*3

I/O

—

units by mask option.

Open-drain withstanding voltage: 12 V

o

4-bit N-ch open-drain I/O port (PORT 13)

Built-in pull-up resistors can be specified in bit

P130-P133*3

I/O

—

units by mask option.

Open-drain withstanding voltage: 12 V

4-bit N-ch open-drain I/O port (PORT 14)

Built-in pull-up resistors can be specified in bit

P140-P143*3

I/O

—

–

Input*2

M

units by mask option.

Open-drain withstanding voltage: 12 V

*1: Circles indicate Schmitt trigger input pins.

2: With drain open: high impedance

With pull-up resistor connected: high level

3: Can directly drive LEDs.

8-Bit

I/O

Input*2

M

Input*2

M

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