UPD75212ACW データシートの表示（PDF） - NEC => Renesas Technology

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UPD75212ACW

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75212A

5. PERIPHERAL HARDWARE FUNCTIONS

5.1 PORTS

I/O ports have the following three functions.

• CMOS input

:8

• CMOS input/output

: 20

• P-ch open-drain, high-voltage, high-current output : 4

Total

32

Table 5-1 Port Functions

Port Name

PORT0

Function

4-bit input

PORT1

PORT2

PORT4

PORT5

PORT3

PORT6

PORTH

4-bit

input/output

4-bit output

Operation and Feature

Remarks

Always read or test possible irrespective of the dual-function Shares the pins with SI, SO, SCK

pin operating mode.

and INT4.

Always read or test possible, P10 and P11 are inputs with the Shares the pins with INT0 to INT

noise elimination function.

2 and TI0.

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

Ports 4 and 5 can input/output data in pairs in 8-bit units.

Ports 4 and 5 can directly drive LEDs.

P23 shares the pin with BUZ.

Can be set bit-wise to the input or output mode. Port 6 can

incorporate a pull-down resistor as a mask option.

P-ch open-drain high-voltage, high-current output port. Can

drive an FIP and LED directly. Can incorporate a pull-down

resistor bit-wise as a mask option.

Shares the pins with T10/S15 to

T13/S12.

17

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