TMS570LC4357: EEPROM and Flash Memory Cell Wear

Hi Emre,

If one memory cell in the main flash memory wears out:

As mentioned in above paragraph, the CPU will do the speculative fetches in main flash memory, if it identifies any memory data corrupted or the cell wear out then it will generate the ESM errors based on correctable or uncorrectable errors.

And if you want to reprogram the device in this condition then the program download will be failed during the verification stage.

If one memory cell in the EEPROM memory wears out:

As the speculative fetches will not happen by the CPU in flash bank 7, so the wear out cell will not generate any ESM errors until the corresponding cell read out by the CPU.

Once CPU read the data in the wear out cell then ECC verification will be done and based on the correctable or uncorrectable errors the corresponding ESM flags will get SET.

--

Thanks & regards,
Jagadish.