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Can several unused pins be pulled-up or pulled-down with one resistor?

Latest Updated:09/09/2011

Question:

Can several unused pins be collectively pulled-up or pulled-down with one resistor?

Answer:

It is NOT recommended that several unused pins collectively pull-up or pull-down with one resistor.

The reason is that excessive current flows to the pins and output element may be destroyed when CPU can be runaway from some causes and the setting of input/output pins are set to “output”.

Suitable Products
SH7286
SH7285
SH7243
SH7214, SH7216
SH7239, SH7237
SH7211
SH7124, SH7125
SH7146, SH7149
SH7144, SH7145
SH7137
SH7136
SH7083, SH7084, SH7085, SH7086
SH7065
SH7058
SH7055
SH7050, SH7051
SH7052, SH7053, SH7054
SH7047, SH7049, SH7105, SH7107, SH7109
SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108
SH7040, SH7041, SH7042, SH7043, SH7044, SH7045
SH7032, SH7034, SH7034B
SH7032
SH7020, SH7021
SH7018
SH7014, SH7016, SH7017
SH7011