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Does direct connecting to GND of unused input pin induce any problems?

Latest Updated:03/25/2009

Question:

With regard to the unused input pin (B: PB0-PB7 in H8/3664), usually, pulling-up is made with the pull-up resistor. Dose direct connecting to GND of this pin induce any problems.

Answer:

Direct connecting should be avoided. We recommend performing pulling-up or pulling-down with the pull-up resistor.

Since in the case of H8/3664 group, port B can be used as A/D, please connect to AVCC when pulling-up.

Suitable Products
H8/300H Tiny
H8/36109
H8/36087
H8/36077, H8/36079
H8/36064
H8/36049
H8/36037, H8/36057
H8/36014, H8/36024
H8/3694
H8/3687
H8/3672
H8/3664
H8/36912, H8/36902