Pin I/O Circuits And Recommended Connection Of Unused Pins - NEC 78K0 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
P01/TI010/TO00
Note
P02/SO11
Note
P03/SI11
Note
P04/SCK11
Note Note
P05/SSI11 /TI001
Note Note
P06/TI011 /TO01
Note
P10/SCK10/TxD0
Note
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
P40/AD0 to P47/AD7
P50/A8 to P57/A15
P60, P61 (Mask ROM version)
P60, P61 (Flash memory version)
P62, P63 (Mask ROM version)
P62, P63 (Flash memory version)
P64/WD
P65/WR
P66/WAIT
P67/ASTB
P70/KR0 to P77/KR7
P120/INTP0
Note SO11, SI11, SCK11, SSI11, TI001, TI011, and TO01 are available only in the
78F0148.
CHAPTER 2 PIN FUNCTIONS
Table 2-2. Pin I/O Circuit Types (1/2)
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
5-A
13-S
13-R
13-V
13-W
5-A
8-A
User's Manual U15947EJ2V0UD
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: Independently connect to EV
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
via a resistor.
DD
or EV via a resistor.
DD SS
µ
PD780146, 780148, and
57