The pull-up resistor or pull-down resistor is necessary for unused input pins.
The influence of the spike noise in the power supply line is received directly when connecting it directly with VCC or GND without resistors, and the possibility of causing the malfunction grows.
Moreover, if the input protection circuit of CPU is destroyed due to unforeseen circumstances, excessive current flows to CPU and the possibility to fatal destruction grows.
Therefore, it is recommended that the pull-up or pull-down resistor should be turned on for unused input pins (or input/output pins that does the input setting).
|SH7052, SH7053, SH7054|
|SH7047, SH7049, SH7105, SH7107, SH7109|
|SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108|
|SH7040, SH7041, SH7042, SH7043, SH7044, SH7045|
|SH7032, SH7034, SH7034B|
|SH7014, SH7016, SH7017|