UPD78044F datasheet(84/472 Pages) NEC

84 / 472 page

Chapter 4

Port Functions

User’s Manual U16504EE1V1UD00

Table 4-1:

Pin Input/Output Types (1/2)

Input/

Output

Name

Function

Alternate Function

After

Reset

Input/

Output

P00

Port 0

4-bit input/output port

Input/output mode can be specified bit-wise

If used an input port, a pull-up resistor can be connected by

software bit-wise

INTP0

Input

P01

INTP1

Input

P02

INTP2

Input

P03

CCLK

Input

P10-P14

Port 1

5-bit input only port

AN10-AN17

Input

Output

P20

Port 2

8-bit output only port

SM11

Output

P21

SM12

Hi-z

P22

SM13

P23

SM14

P24

SM21

P25

SM22

P26

SM23

P27

SM24

Input/

Output

P34

Port 3

4 bit input/output port

Input/output mode can be specified bit-wise

TI50/TO50/S27

Input

P35

SCK30/S26

Input

P36

S030/S25

Input

P37

SI30/S24

Input

Input/

Output

P40-P47

Port 4

8-bit input/output port

Input/output mode can be specified bit-wise

This port can be used as a segment signal output port or an

I/O port, in an 8-bit unit setting the port function

S0-S7

Input

Output

P50

Port 5

8-bit output only port

SM31

Hi-z

P51

SM32

P52

SM33

P53

SM34

P54

SM41

P55

SM42

P56

SM43

P57

SM44

Input/

Output

P60

Port 6

6-bit input/output port

Input/output mode can be specified bit-wise

SGOF-SGO

Input

P61

SGOA-PCL

P62

RXD0

P63

TXD0

P64

TI20

P65

TI21

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