UPD754144 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD754144

4-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD754144, 754244

3. PIN FUNCTION

3.1 Port Pins

Pin Name

P30

P31

P32

P33

P60

P61

P62

P63

P70

P71

P72

P73

P80

Input/Output

Input/Output

Input/Output

Input

Input/Output

Alternate

Function

PTO0

PTO1

PTO2

–

AVREF

INT0

PTH00

PTH01

KR4

KR5

KR6

KR7

–

Function

8-bit

I/O Circuit

After Reset

I/O

TYPE Note 1

Programmable 4-bit input/output port

–

Input

E-B

(PORT3).

This port can be specified input/output bit-

wise.

On-chip pull-up resistor connection can be

specified by software in 4-bit units.

Programmable 4-bit input/output port (PORT6). –

This port can be specified input/output bit-

wise.

On-chip pull-up resistor can be specified by

software in 4-bit unitsNote2.

Noise eliminator can be selected with P61/INT0.

4-bit input port (PORT7).

–

On-chip pull-up resistor can be specified by

software bit-wise.

Input

Input

F -A

B -A

1-bit input/output port (PORT8).

–

On-chip pull-up resistor connection can be

specified by software.

Input

F -A

Notes 1. Circled characters indicate the Schmitt-trigger input.

2. Do not specify an on-chip pull-up resistor connection when using the programmable threshold port.

9

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