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Can I keep the unused analog pin for the B board to be open?

Latest Updated:02/27/2012

Question:

The A board uses 8 analog input pins and the B board uses only 7 analog input pins. While the software for both boards is the same, may I keep the unused analog input pin for the B board open?

Answer:

When the software is the same and the unused analog input pin on the B board is set to the input, if kept open, the noise from the unused analog input pin may cause malfunction. Therefore, connect this pin with VCC or VSS via a resistor.
Suitable Products
M32C/8A
M32C/88
M32C/87
M32C/85
M32C/84
M32C/83
M32C/80
M16C/62A
M16C/62A(M16C/62T)
M16C/62M
M16C/62N
M16C/62N(M3062GF8NFP, M3062GF8NGP)
M16C/62P
M16C/63
M16C/64A
M16C/64C
M16C/65
M16C/65C
M16C/6C
M16C/6N4, M16C/6N5
M16C/6NK, M16C/6NL, M16C/6NM, M16C/6NN
M16C/5L
M16C/56
M16C/5LD
M16C/56D
M16C/5M
M16C/57
M16C/30P
M16C/29
M16C/28
M16C/26A
M16C/1N