UPD754302A 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD754302A

4-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD754302, 754304, 754302(A), 754304(A)

6. PERIPHERAL HARDWARE FUNCTIONS

6.1 Digital Input Ports

The following three types of I/O ports are provided.

• CMOS input (Ports 0, 1)

:8

• CMOS I/O (Ports 2, 3, 6 to 8)

: 18

• N-ch open-drain I/O (Port 5)

:4

Total

30

Table 6-1. Types and Features of Digital Ports

Port Name

PORT0

PORT1

PORT2

PORT3

PORT5

PORT6

PORT7

PORT8

Function

4-bit input

4-bit I/O

4-bit I/O

(N-ch open-

drain, 13 V)

4-bit I/O

2-bit I/O

Operation, Features

When serial interface function is used, multiplexed pin

has output function depending on operation mode.

Input port.

Can be set in input or output mode in 4-bit units.

Can be set in input or output mode in 1-bit units.

Can be set in input or output mode in 4-bit units. Pull-up

resistor can be connected in 1-bit units by mask option.

Remark

Multiplexed with INT4, SCK,

SO/SB0, and SI pins

Multiplexed with INT0

through INT2 and TI0/TI1 pins.

Multiplexed with PTO0, PTO1,

and PCL pins.

—

Can be set in input or

output mode in 1-bit units.

Can be set in input or

output mode in 4-bit units.

Ports 6 and 7 are used in

pairs and can input or

output data in 8-bit units.

Can be set in input or output mode in 2-bit units.

Multiplexed with KR0 through

KR3 pins.

Multiplexed with KR4 through

KR7 pins.

—

20

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