Datasheet

CHAPTER 2 PIN FUNCTIONS
User’s Manual U18172EJ3V0UD
27
2.3 Pin I/O Circuits and Connection of Unused Pins
Tables 2-1 and 2-2 show 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 (
μ PD78F920x)
Pin Name I/O Circuit Type I/O Recommended Connection of Unused Pin
P20/ANI0/TI000/TOH1
P21/ANI1/TI010/TO00/
INTP0
11
Input: Individually connect to V
DD or VSS via resistor.
Output: Leave open.
P22/ANI2/X2
P23/ANI3/X1
36
Input: Individually connect to V
SS via resistor.
Output: Leave open.
P32/INTP1 8-A
I/O
Input: Individually connect to V
DD or VSS via resistor.
Output: Leave open.
P34/RESET 2 Input Connect to VDD via resistor.
P40 and P43 8-A I/O
Input: Individually connect to V
DD or VSS via resistor.
Output: Leave open.
Table 2-2. Types of Pin I/O Circuits and Connection of Unused Pins (
μ PD78F950x)
Pin Name I/O Circuit Type I/O Recommended Connection of Unused Pin
P20/TOH1
P21/INTP0
P22
P23/EXCLK
P32/INTP1
8-A I/O
Input: Individually connect to V
DD or VSS via resistor.
Output: Leave open.
P34/RESET 2-A Input Set ENPU34 to “1” on the option byte, and leave the pin open.
P40 and P43 8-A I/O
Input: Individually connect to V
DD or VSS via resistor.
Output: Leave open.
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