Part Number: AM62L
Hello TI team,
We are exploring programming inique Ethernet MAC addresses permanently to each of our AM62L-based units during manufacturing. As I understand from https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1235880/faq-how-to-update-ids-usb-pcie-pid-vid-mac-id-by-programming-extended-otp-on-am6x, if this data is written in a specifc format, the ROM will copy this address to the memory mapped registers at boot time.
For ease of manufacturing, we would be looking to do a two-stage approach:
1) Write the secure boot keys, along with our OUI prefix for the MAC address into the device's OTP area. We would want to store this as a keywriter blob to be shared among all manufactured units.
2) At runtime in the U-Boot shell, burn the device ID, along with other device unique information into the OTP.
Could you please clarify if the process above would be supported?
Specifically:
Is the boot time ROM copy of the MAC address from the extended OTP area into the MACID0/MACID1 supported with the AM62L?
How would we need to layout the information in extended OTP to accomplish this?:
- For the keywriter lite utility, I suspect we would need to program the fields as follows:
Where AA:BB:CC represents our OUI, and DD:EE:FF represents the device ID (written as 0 to be programmed later in U-Boot).
What rows would we need to write-protect from the keywriter-lite utility, and what rows would be protected after using the u-boot fuse command?
If you have any other examples or scripts that would also be greatly appreciated.
Thank you,
Aidan
