UPD178024GC datasheet(13/56 Pages) NEC

13 / 56 page

µPD178023, 178024

Data Sheet U14126EJ1V0DS00

1.3 I/O Circuits of Pins and Recommended Connections of Unused Pins

Table 1-1 shows the types of the I/O circuits of the respective pins and the recommended connections of the pins

when they are not used. For the configuration of the I/O circuit of each pin, refer to Figure 1-1.

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

Pin Name

I/O Circuit Type

I/O

Recommended Connection of Unused Pin

P00/INTP0-P04/INTP4

I/O

Set these pins in general-purpose input mode in software, and connect

P05, P06

each of them to VDD, VDDPORT, GND, or GNDPORT via resistor.

P10/ANI0-P15/ANI5

Input

Connect each of them to VDD, VDDPORT, GND, or GNDPORT via resistor.

P30-P32

I/O

Set these pins in general-purpose input mode in software, and output

P33/TI50

5-K

low-level signal. Leave unconnected.

P34/TI51

P35

P36/BEEP0

P37

P40-P47

5-A

Set these pins in general-purpose input mode in software, and connect each

of them to GND or GNDPORT via resistor.

P50-P57

Set these pins in general-purpose input mode in software, and connect each

of them to VDD, VDDPORT, GND, or GNDPORT via resistor.

P60-P67

Set these pins in general-purpose input mode in software, and output

low-level signal. Leave unconnected.

P70/SI3

5-K

Set these pins in general-purpose input mode in software, and connect each

P71/SO3

of them to VDD, VDDPORT, GND, or GNDPORT via resistor.

P72/SCK3

5-K

P73

P74/RXD0

5-K

P75/TXD0

P76/SDA0

10-D

P77/SCL0

P120-P125

P130/TO50

Output

Set these pins to low-level output in software and leave unconnected.

P131/TO51

P132

EO0, EO1

DTS-EO1

Output

Leave unconnected.

VCOL, VCOH

DTS-AMP

Input

Disable PLL in software and select pull-down.

AMIFC, FMIFC

Set these pins in general-purpose input port mode in software and connect

each of them to VDD, VDDPORT, GND, or GNDPORT via resistor.

REGOSC, REGCPU

–

Connect these pins to GND via 0.1-

µF capacitor.

RESET

Input

–

VDDPLL

–

Connect this pin to VDD.

GNDPLL

Directly connect these pins to GND or GNDPORT.

UPD178024GC Datasheet(PDF) 13 Page - NEC

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