RA6 won't erase

We've had a couple of R7FA6E10F2CFP that only seem to program once, and that's it.  We are using P&E programmers in our production, and no bits are changing in the chip configuration.  They will no longer erase.  I've tried downloading Renesas Flash Programmer, and tried using the J-Link to try to clear it up, but it just reports that the erase operation failed.  Is there a way to get them working again?  More importantly, what causes them to get this way?

Parents Reply
  • Ok, so the serial programming interface that is used in boot mode is totally disabled at the moment because neither communication interface is connected and also MD pin is high.

    If the MD pin is pulled up high, the device cannot enter boot mode. The device enters boot mode when MD=0 at the moment of reset release.

    If you could manage to run the Initialize command, you would get the response of the device to the command and thus the nature of the error.

    Can you double check the value of SAS : Startup Area Setting Register at 0x0100_A134 ?

    Also, are those chips virgin/unprogrammed ?

    If the power supply voltage is flawless, the device could be electrically damaged.

Children