I have an odd observation.
If I plug a TX1 into my carrier board and power on while holding RECOVERY button it does enter recovery mode.
Also - if the board is powered on and I hold RECOVERY low and toggle RESET_IN it also does enter recovery mode.
If i plug in a TX2 I’m unable to enter recovery mode using the two different methods above and I have to unplug the TX2 and put it into the development board to flash it which is quite annoying.
Some information about my carrier board:
Jetson is powered with +8V and the VIN_PWR_BAD (B8) pin is connected to the “Power Good” signal of the +8V regulator.
RESET_OUT is connected to my carrierboards +1.8V Power Good signal which is the last supply to be turned on.
RESET_IN is tied to a push button that goes to ground and there’s no pull up connected.
CARRIER_POWER_ON signal asserts a LM3880 power sequencer that turns on 5V then 3.3V and finally 1.8V with 16mS delay between each supply turning on.
Once the 1.8V starts then it’s Power Good signal will release RESET_OUT on the jetson.
Can you explain me what differences there are between the FORCE RECOVERY circuit on TX1 vs. TX2 ?