CHAPTER 2 PIN FUNCTIONS
User's Manual U11919EJ3V0UM00
39
2.3 Pin Input/Output Circuits and Connection of Unused Pins
Types of input/output circuits for pins and recommended connection of unused pins are shown in Table 2-1.
For the configuration of each type of input/output circuit, see Figure 2-1.
Table 2-1. Type of Input/Output Circuit of Each Pin and Handling of Unused Pins
Pin Name
I/O Circuit Type
Input/Output
Recommended Connection for Unused Pins
P00 to P07
P10 to P17
5-X
P20/ASCK/SCK0
8-J
P21/TxD/SO0
5-X
P22/RxD/SI0
P30/INTP0
P31/INTP1
P32/INTP2/CPT2
P40/KR0 to P47/KR7
P50/TI0/TO0
8-J
P51/TO2
P52, P53
5-X
Input/output
Input:
Connect these pins to the V
DD0
, V
DD1
, V
SS0
, or V
SS1
pin via respective resistors.
Output: Leave these pins open.
RESET
2
Input
−
NC
Connect this pin directly to the V
SS0
or V
SS1
pin (possible
to leave open).
IC (mask ROM model)
V
PP
(
µ
PD78F9026A)
−
−
Connect these pins directly to the V
SS0
or V
SS1
pin.
Summary of Contents for mPD789026 Subseries
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