Part Number:MSP430G2553
Tool/software: Code Composer Studio
Hello
I using MSP430G2553 and achieve touch detection by RO_PINOSC_TA0_WDTp Method , I encountered the following problems;
SMCLK is set to 1MHZ For a fixed capacitance change, the change in TA0CCR1 measurement is small and varies by approximately 5%.
SMCLK is set to the same capacitance change of 125KHZ. The TA0CCR1 measurement varies a lot, about 70%.
According to the measurement principle, the measurement window time becomes smaller, then TA0 counts base with smaller but does not affect the magnitude of change (this is my personal understanding do not know is correct).
This problem has been bothering me for a long time, please tell me why?
Thank you
Best regards
JackLiu