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

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

Table 2-2 shows the types of pin I/O circuits and the recommended connections of unused pins.
See Figure 2-1 for the configuration of the I/O circuit of each type.
Pin Name
P00/TI000 5-AH
P01/TI010/TO00
Note 1
P02/SO11 5-AG
Note 1
P03/SI11 5-AG (
78F0532, 78F0533),
Note 1
P04/SCK11
5-AH (
Note 1 Note 1
P05/SSI11 /TI001
78F0535, 78F0536,
Note 1 Note 1
P06/TI011 /TO01
78F0537, 78F0537D)
P10/SCK10/TxD0 5-AH
P11/SI10/RxD0
P12/SO10 5-AG
P13/TxD6
P14/RxD6 5-AH
P15/TOH0 5-AG
P16/TOH1/INTP5 5-AH
P17/TI50/TO50
P20/ANI0 to 11-G
Note 2
P27/ANI7
P30/INTP1 5-AH
P31/INTP2
P32/INTP3
P33/TI51/TO51/INTP4
P40 to P43 5-AG
P50 to P53
P60/SCL0 13-AD
P61/SDA0
P62/EXSCL0
P63 13-P
P70/KR0 to P77/KR7 5-AH
P120/INTP0/EXLVI
Notes 1. Available only in the
2. P20/ANI0 to P27/ANI7 are set in the analog input mode after release of reset.
CHAPTER 2 PIN FUNCTIONS
Table 2-2. Pin I/O Circuit Types (1/2)
I/O Circuit Type I/O
I/O
µ
PD78F0531,
µ
PD78F0534,
µ
PD78F0534, 78F0535, 78F0536, 78F0537, and 78F0537D.
Preliminary User's Manual U17260EJ3V1UD
Recommended Connection of Unused Pins
Input: Independently connect to EV
Output: Leave open.
<Analog setting>
Connect to AV or AV .
REF SS
<Digital setting>
Input: Independently connect to EV
Output: Leave open.
Input: Independently connect to EV
Output: Leave open.
Input: Connect to EV .
SS
Output: Leave this pin open at low-level output after clearing
the output latch of the port to 0.
Input: Independently connect to EV
Output: Leave open.
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