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SLoi0's avatar
SLoi0
Icon for New Contributor rankNew Contributor
7 years ago

EPCQL512 Status Register Bits 7 is on. What is bit 7 and how to turn it off ?

Can't make change to the protect bits 2-6 (BP0, BP1, BP2, BP3 and TB) anymore. There is no information on the Status Register Bits 7 in "EPCQ-L Serial Configuration Devices Datasheet"

4 Replies

  • ShafiqY_Intel's avatar
    ShafiqY_Intel
    Icon for Frequent Contributor rankFrequent Contributor

    Hi SLoi0,

    Basically, Status Register Bits 7 is doing nothing. Thus, it is does not matter either 0 or 1.

    Do you able to change the Status Register bits 2-6 before?

    Do you make any changes before the protect bits 2-6 can't make change?

    ThanksšŸ˜‰

  • SLoi0's avatar
    SLoi0
    Icon for New Contributor rankNew Contributor

    Yes, I did changed the protect bit register to 0x48 and some how it read back 0xC8 from the status register. When I try to write to the status register again, the status register read back 0xCA and Flag Status Register read back 0x83 (Failure or protection error).

    Thanks,

    • SLoi0's avatar
      SLoi0
      Icon for New Contributor rankNew Contributor
      Hi MShafiq, I tried to erase with a JIC file which include both the ā€œUsed Bitstream’ and ā€œNon-Used Bitstreamā€, but it failed due to protected sectors. [cid:image006.png@01D5179C.DF734C30] [cid:image001.png@01D5179B.6D329960] Status Register bit 7 got stucked and I can’t change it protect bit anymore. Thanks, Steven