Can I feed a clock frequency other than 32.768kHz into fclk of MAX30003? (e.g somewhere 32.7kHz to 32.8kHz)
It is not recommended since all the timing will be affected, the sample rate, and R-R…. For example, in Table 6 of MAX30003, FMSTR is based on FCLK. If FCLK is different, the clock numbers in the table needs to be scaled accordingly.