As the “Jetson TX2 OEM product design guide” mentioned, the 1.8V supply on the carrier board associated with MPIO pins common to Jetson TX2 must not be enabled unless the Jetson TX2 main 1.8V rail is on. That means the 1.8V on carrier board should be powered on after the TX2 enabled signal “CARRIER_PWR_ON”.
So my question is how about other power rail such as 5V, 3.3V, power for UART, HDMI,and SATA which also connect to TX2?
Could they can not be restrict by the “CARRIER_PWR_ON”?
You can see in figure 2 of OEM DG, ‘carrier_pwr_on’ signal is used to enable 5V, 3.3V & 1.8V of carrier board.They must be controlled by carrier_pwr_on as there is timing request between module power up and carrier power up.