Справочник Пользователя для IBM uPD78P081(A2)

When P10/ANI0-P17/ANI7 pins are used as the analog inputs for the A/D converter, set the port 1 to

the input mode.  The on-chip pull-up resistor is automatically disabled.

Pin Name

Input/Output

Function

After Reset

Alternate Function

P00

Input

Port 0

Input only

Input

—

P01

Input/output

4-bit input/output port

Input/output is specifiable

Input

INTP1

P02

bit-wise.  When used as the

INTP2

P03

input port, it is possible to

INTP3

connect a pull-up resistor by

software.

P10-P17

Input/output

Port 1

Input

ANI0-ANI7

8-bit input/output port

Input/output is specifiable bit-wise.

When used  as the input port, it is possible to connect

a pull-up resistor by software. 

Note

P30-P34

Input/output

Port 3

Input

—

P35

8-bit input/output port

PCL

P36

Input/output is specifiable bit-wise.

BUZ

P37

When used  as the input port, it is possible to connect

—

a pull-up resistor by software.

P50-P57

Input/output

Port 5

Input

—

8-bit input/output port

A maximum of 7 out of 8 ports can drive LEDs directly.

Input/output is specifiable bit-wise.

When used  as the input port, it is possible to connect

a pull-up resistor by software.

P70

Input/output

Port 7

Input

SI2/RxD

P71

3-bit input/output port

SO2/TxD

P72

Input/output is specifiable bit-wise.

SCK2/ASCK

When used  as the input port, it is possible to connect

a pull-up resistor by software.

P100

Input/output

Port 10

Input

TI5/TO5

P101

2-bit input/output port

TI6/TO6

Input/output is specifiable bit-wise.

When used  as the input port, it is possible to connect

a pull-up resistor by software.