The electrical specs: https://mccdaq.github.io/daqhats/_static/esmcc134.pdf do not list the modulator frequency of the ADC. Neither the data output rate. Can I assume that data output rate is the inverse of the `update_interval`? Also, why can the `update_interval` only have an integer value between 1 and 255? (https://mccdaq.github.io/daqhats/python.html?highlight=calibration#daqhats.mcc134.update_interval_write)