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AM2634-Q1: debug the HS-SE device

Jenney Ni
Intellectual 2510 points

Part Number: AM2634-Q1
Other Parts Discussed in Thread: UNIFLASH

Hi all,

I will describe the status of a faulty component. Could you provide some debugging ideas? Thanks so much.
  1. AM2634COKFHMZCZRQ1: This is a zero-kilometer car right off the factory assembly line. The entire OBC (On-Board Charger) module is not working. It has not been removed from the vehicle yet, but it will be disassembled later. What troubleshooting or inspection work can be performed right now under the current conditions?
  2. HS-SE State & Blown JTAG: The device is in the HS-SE (High Security - Security Enforced) state, and the JTAG interface has been blown (fused). Only the UART port is available, but currently, the SBL (Secondary Bootloader) fails to start normally.
  3. Root Cause Verification: Is there a way to confirm whether the SBL failed to boot due to an HSM ROM secure verification failure of the SBL image, or if it was caused by some other reasons?
  4. Image Readback via UART: It seems that sbl_uart_uniflash can only write new images to the flash but cannot read back the current image from the device. Is there any method to read back the existing image from the device via the UART port?

Regards,

Jenney