In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

Use the normal math rules:

Step 2:
(2*Vdd) - (2*Uinmin)

Step 3:
Vdd - ( 2^(N-1) * ( Uinmax - Uinmin ) )

Step 4:
N is bit resolution, so 8 for byte, 16 for word, 10 for 10bits ADC.
Fs is interrupt frequency in Herz.
For example, if FREQ = 50MHz and intperiod=217 (prescaler 1:1)
then Fs = 50MHz/217 = 230415 Hz
With Fs in Herz and R in ohms yields C in Farad
With Fs in Megahertz and R in ohms yields C in microfarad

regards peter

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