AM625: AM625 eFuse configuration

Oleksiy Kasyan

Prodigy 80 points

Part Number: AM625
Other Parts Discussed in Thread: AM623,

I'm working on the Computer on Module design based on the AM625 / AM623 SoCs.

I didn't find in the datasheet and reference manual clear information about the eFuse feature.

Which peripherals can be configured with the eFuse?

Is the following sentence correct?

One-Time Programmable eFuses may be used to configure the MAC address, security
keys, device ID, or disable peripherals/features such as JTAG, UARTs.
Recovery mode may be disabled through eFuses, preventing a malicious actor to quickly swap the module’s
image. When using secure boot, even an eMMC replacement is not capable of changing the keys
to validate a malicious image, as security keys are stored in eFuses.

over 2 years ago

0 Kallikuppa Sreenivasa over 2 years ago

TI__Guru**** 224895 points

Hello Oleksiy Kasyan

Thank you for the query.

Oleksiy Kasyan said:
One-Time Programmable eFuses may be used to configure the MAC address, security
keys, device ID, or disable peripherals/features such as JTAG, UARTs.
Recovery mode may be disabled through eFuses, preventing a malicious actor to quickly swap the module’s
image. When using secure boot, even an eMMC replacement is not capable of changing the keys
to validate a malicious image, as security keys are stored in eFuses.

Help me understand the use case for the above description.

The below FAQ could help

(+) [FAQ] How to program the extended OTP efuse on AM6x SoC - Processors forum - Processors - TI E2E support forums

(+) [FAQ] How to update IDs (USB & PCIe PID/VID, MAC ID) by programming extended OTP on AM6x - Processors forum - Processors - TI E2E support forums

Regards,

Sreenivasa