Pin I/O Circuits And Recommended Connection Of Unused Pins - NEC 78K0/KD1 Series User Manual

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

Table 2-1 shows the types of pin I/O circuits and the recommended connections of unused pins.
Refer to Figure 2-1 for the configuration of the I/O circuit of each type.
Pin Name
P00/TI000
P01/TI010/TO00
P02
P03
P10/SCK10/TxD0
P11/SI10/RxD0
P12/SO10
P13/TxD6
P14/RxD6
P15/TOH0
P16/TOH1/INTP5
P17/TI50/TO50
P20/ANI0 to P27/ANI7
P30/INTP1 to P32/INTP3
P33/TI51/TO51/INTP4
P60, P61 (Mask ROM version)
P60, P61 (Flash memory version)
P62, P63 (Mask ROM version)
P62, P63 (Flash memory version)
P70/KR0 to P77/KR7
P120/INTP0
P130
P140/PCL/INTP6
RESET
XT1
XT2
AV
REF
AV
SS
IC
V
PP
CHAPTER 2 PIN FUNCTIONS
Table 2-1. Pin I/O Circuit Types
I/O Circuit Type I/O
8-A I/O
5-A
8-A
5-A
8-A
9-C Input
8-A I/O
13-S
13-R
13-W
13-V
8-A
3-C Output
8-A I/O
2 Input
16
−
− −
− −
− −
Preliminary User's Manual U16315EJ1V0UD
Recommended Connection of Unused Pins
Input: Independently connect to EV
Output: Leave open.
Connect to EV or EV .
DD SS
Input: Independently connect to EV
Output: Leave open.
Input: Connect to EV .
SS
Output: Leave open and keep this pin to low.
Input: Independently connect to EV
Output: Leave open.
Leave open.
Input: Independently connect to EV
Output: Leave open.
Connect directly to EV or V
DD DD
Leave open.
Connect directly to EV or V
DD DD
Connect directly to EV or V
SS SS
Connect directly to EV or V
SS SS
or EV via a resistor.
DD SS
or EV via a resistor.
DD SS
or EV via a resistor.
DD SS
or EV via a resistor.
DD SS
−
.
.
.
.
43