To deactivate OWI communication and restart the compensation engine inside the PGA305 device (if it was in reset), these two steps must be performed by the OWI master:
Set the OWI_XCR_EN bit in the DIG_IF_CTRL register to 0 to turn off the OWI transceiver.
Set the COMPENSATION_RESET bit in the COMPENSATION_CONTROL register to 0 to de-assert the compensation engine reset.