CHAPTER 2 PIN FUNCTIONS
User’s Manual U17446EJ3V1UD
25
2.3 Pin I/O Circuits and Connection of Unused Pins
Table 2-1 shows I/O circuit type of each pin and the connections of unused pins.
For the configuration of the I/O circuit of each type, refer to
Figure 2-1
.
Table 2-1. Types of Pin I/O Circuits and Connection of Unused Pins
Pin Name
I/O Circuit Type
I/O
Recommended Connection of Unused Pin
P00 to P03
8-A
Input: Independently connect to V
DD
or V
SS
via a resistor.
Output: Leave open.
P20/ANI0 to P23/ANI3
11
Input: Independently connect to AV
REF
or V
SS
via a resistor.
Output: Leave open.
P30/TI000/INTP0
P31/TI010/TO00/INTP2
P32 and P33
8-A
I/O
Input: Independently connect to V
DD
or V
SS
via a resistor.
Output: Leave open.
P34/RESET
2
Input
Connect to V
DD
via a resistor.
P40
P41/INTP3
P42/TOH1
P43/TxD6/INTP1
P44/RxD6
P45 to P47
P120
8-A
Input: Independently connect to V
DD
or V
SS
via a resistor.
Output: Leave open.
P121/X1
P122/X2
16-B
Input:
Independently connect to V
SS
via a resistor.
Output: Leave open.
P123 8-A
I/O
Input: Independently connect to V
DD
or V
SS
via a resistor.
Output: Leave open.
P130 3-C
Output
Leave
open.
AV
REF
−
Input
Connect directly to V
DD
.
AV
SS
−
−
Connect directly to V
SS
.
Содержание 78K0S/KB1+
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