Arria 10: Remote Update may brick FPGA and Factory Fallback won't work

Hello Fabian,

Sorry to keep you waiting. Few steps to check for debug:

Could you please check below?

1- confirm factory image is correctly programmed at boot address.

2- ensure application image is programmed at known valid address.

3- verify the .jic file start address matches the RU_PAGE_SELECT value.

Application Image validation.

1- Confirm application image can be loaded successfully when normal condition

2- Confirm FPGA able to enter user mode (CONF_DONE-> HIGH)

3- Confirm watchdog is not enabled - no writes to RU_RESET_TIMER

Factory Image validation.

1- Power up and confirm it boot into factory image.

2- read RU_RECONFIG_TRIGGER_CONDITIONS to confirm power up state (Bit0 = 0)

3- Factory image set to below parameters:

a. RU_PAGE_SELECT = application image address

b. RU_CONFIGURATION_MODE = 1 (Application Mode)

c. RU_WATCHDOG_TIMEOUT = set the correct value

d. RU_WATCHDOC_ENABLE = 1

4- trigger reconfiguration by writing 1 to RU_RECONFIG

Test fallback mechanism.

1-Manually corrupt the application image (erase some part or misalign)

2- Check if FPGA fail to enter user mode

3- check if FPGA fallback to factory image

4- read the RU_RECONFIG_TRIGGER_CONDITIONS reflecting the correct cause(Bit1 = watchdog timeout)

If you have followed all above and still you observed the fallback mechanism doesn't kick in. We will need your design for escalation.

regards,

Farabi