SWCU193 April 2023 CC2340R2 , CC2340R5 , CC2340R5-Q1
The ADC peripheral clock (ADCCLK) is provided by CKMD and is used for the sampling clock (SAMPCLK). CLKSVT and HFXT are the clock sources available for ADCCLK, which can support up to 48 MHz. Refer to the device-specific data sheet for supported ADCCLK frequencies. Using CLKSVT, which is the bus clock for all peripherals, is very useful for deterministic start of sampling and simultaneous sampling. Using the HFXT as the clock source for ADCCLK is useful for when a very accurate, low-jitter, sampling period is needed. The ADC clock source can be selected by writing the CKMD.ADCCLKSEL[1:0] SRC bit field. The conversion clock is sourced from the selected ADCCLK within the digital hardware.