Hi I am currently doing a customer carrier board suitable for Jetson Nano, Xavier NX, Orin Nano and Orin NX. As I know for power up sequence, it does required to meet certain sequence. I am using Jetson Nano Developer board power up logic circuit as reference design without using a MCU. It works for Jetson Nano and Xavier NX. It does not power up for Orin Nano and Orin NX. Is that power up logic circuit suitable for Orin Nano and Orin NX?
Hi, please probe the power on sequence on your board to check if it is same to below sequence in DG. Also you should refer to the Interface Comparison & Migration Application Note to make sure your board interface can work with Orin NX/Nano module.
In Orin NX and Orin Nano Design Guide, SYS_RESET is shown as 14ms after Power_EN. Which one is correct? 14ms or 80ms? I believe it is not controlled by carrier board. SYS_RESET is pulled up by Orin board, am I right?
Yes, it is controlled by module. Please refer to latest doc which is 80ms. https://developer.nvidia.com/downloads/jetson-orin-nx-series-nano-series-design-guide
By changing the C303 value to 10 uF, the delay between VDD_IN and POWER_EN has been changed to around 1.8s.
The same circuit works for Jetson Nano and Jetson Xavier NX, not for Orin NX and Orin Nano. For Orin NX and Orin Nano, carrier board supplies show up and power LED light up. After certain time, power LED will off and carrier board supplies remains on. Seems Orin NX and Orin Nano can not get into boot load. Is there anything else missing in my design?
Since SYS_RESET is released, module PMIC power on correctly. It looks like interface issue on your board. The interface is not totally same among nano, Xavier NX, Orin NX and Orin Nano. Please check your board based on Interface Comparison & Migration Application Note and Orin NX/Nano Design Guide.
On our customer carrier board, there is no ID EEPROM attached to I2C2 bus. After attaching ID EEPROM on I2C2, Orin can boot now. For a customer carrier board without ID EEPROM design, is this the instruction to follow?
https://docs.nvidia.com/jetson/archives/r35.1/DeveloperGuide/text/HR/JetsonModuleAdaptationAndBringUp/JetsonAgxOrinSeries.html?highlight=adaptation#modifying-the-eeprom
Please correct me if it is not.
Yes, that’s for custom design without eeprom.
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