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Chapter 1 Overview
I - 30
Precautions
Unused pins (for I/O)
Unused I/O pins should be set according to pins' condition at reset. If the output is high impedance (Pch
/ Nch transistor : output off) at reset, to stabilize input, set 10 kΩ to 100 kΩ resistor to be pull-up or pull-
down. If the output is on at reset, set them open.
Figure 1-6-3 Unused I/O pins (high impedance output at reset)
Input
Data
Output OFF
10 kΩ to 100 kΩ
Output control
Input
Data
Output OFF
Output control
10 kΩ to 100 kΩ
Input
Data
Nch
Output OFF
10 kΩ to 100 kΩ
Input
Data
Nch
Output OFF
10 kΩ to 100 kΩ