UPD178018 datasheet(11/56 Pages) NEC

11 / 56 page

µPD178004, 178006, 178016, 178018

3.3 INPUT/OUTPUT CIRCUITS AND RECOMMENDED CONNECTION OF UNUSED PINS

Table 3-1 shows the input/output circuit types of pins and the recommended conditions for unused pins.

Refer to Figure 3-1 for the configuration of the input/output circuit of each type.

Table 3-1. I/O Circuit Type of Each Circuit

Pin Name

I/O Circuit Type

I/O

Recommended Connections of Unused Pins

P00/INTP0

Input

Connected to GND or GNDPORT

P01/INTP1-P06/INTP6

I/O

Set in general-purpose input port mode by software and

P10/ANI0-P15/ANI5

11-A

individually connected to VDD, VDDPORT, GND, or GNDPORT

P20/SI1

via resistor.

P21/SO1

P22/SCK1

P23/STB

P24/BUSY

P25/SI0/SB0/SDA0

P26/SO0/SB1/SDA1

P27/SCK0/SCL

P30-P32

P33/TI1, P34/TI2

P35

P36/BEEP

P37

P40-P47

5-G

P50-P57

P60-P63

P64-P67

P120-P125

P132/PWM0-P134/PWM2

Output

Set to low-level output by software and open

EO0

DTS-EO1

Open

EO1

DTS-EO2

VCOL, VCOH

DTS-AMP

Input

Set to disabled status by software and open

AMIFC, FMIFC

—

Connected to GND or GNDPORT directly

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