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How to properly use A/D converter based on internal pull up resistors?

Latest Updated:04/05/2011

Question:

When using the A/D converter, is there any change in the A/D conversion results based on the availability of the internal pull-up resistors selected in the analog input pin pull-up control register?

Answer:

The A/D conversion results vary based on the availability of the internal pull-up resistors selected in the analog input pin pull-up control register. When using the A/D converter, if changes in the A/D conversion results causes a problem, set to no internal pull-up resistor selected in the analog input pin pull-up control register.
Suitable Products
R8C/1x
R8C/2x
R8C/3x
R8C/38A
R8C/Lx
R8C/Mx