Note that when the AFE4403 is deselected, the SPISOMI, CLKOUT, ADC_RDY, and DIAG_END digital output pins do not enter a 3-state mode. This condition, therefore, must be taken into account when connecting multiple devices to the SPI port and for power-management considerations. In order to avoid loading the SPI bus when multiple devices are connected, the SOMI_TRI register bit must be to 1 whenever the AFE SPI is inactive. The DIGOUT_TRISTATE register bit must be set to 1 to tri-state the ADC_RDY and DIAG_END pins. The CLKOUT_TRI register bit must be set to 1 to put the CLKOUT buffer in tri-state mode.