Pin I/O Circuits And Recommended Connections Of Unused Pins - NEC mPD178054 Series User Manual

2.3 Pin I/O Circuits and Recommended Connections of Unused Pins

Table 2-1 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 2-1.
Table 2-1. Pin I/O Circuit Type and Recommended Connections of Unused Pins
Pin Name I/O Circuit Type
P00/INTP0 to P04/INTP4 8
P05, P06
P10/ANI0 to P15/ANI5 25
P30 to P32 5
P33/TI50 5-K
P34/TI51
P35 5
P36/BEEP0
P37/BUZ
P40 to P47 5-A
P50 to P57 5
P60 to P67
P70/SI30 5-K
P71/SO30 5
P72/SCK30 5-K
P73 5
P74/SI31 5-K
P75/SO31 5
P76/SCK31 5-K
P77/TI52
P120/SI32
P121/SO32 5
P122/SCK32 5-K
P123/SI321
P124/SO321 5
P125/SCK321 5-K
P130/TO50 19
P131/TO51
P132/TO52
EO0, EO1 DTS-EO1
VCOL, VCOH DTS-AMP
AMIFC, FMIFC
REGOSC, REGCPU
RESET 2
V PLL
DD
GNDPLL
IC (Mask ROM version)
( µ PD178F054)
V
PP
CHAPTER 2 PIN FUNCTION
I/O
I/O Input: Connect to V
Output: Leave open.
Input Connect to V
I/O Input: Connect to V
Output: Leave open.
Output Leave open.
Input Disable PLL in software and select pull-down.
Set these pins in general-purpose input port mode by software and connect
each of them to V
Connect these pins to GND via 0.1 µ F capacitor.
– –
Input
– – Connect to V
Directly connect to GND or GNDPORT.
User's Manual U15104EJ2V0UD
Recommended Connection of Unused Pin
, V PORT, GND, or GNDPORT via a resistor.
DD DD
, V PORT, GND, or GNDPORT.
DD DD
, V PORT, GND, or GNDPORT via a resistor.
DD DD
, V PORT, GND, or GNDPORT via a resistor.
DD DD
–
.
DD
35