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MGSTAT0 occasionally set on flash erase

Question asked by Peter Steinberg on Jun 17, 2016
Latest reply on Jul 14, 2016 by John Reid

I'm using a K20 (MK20DX128VLK7) processor.

 

Occasionally when I try to erase a block of the program flash I get an FTFL_FSTAT result with the MGSTAT0 bit set.

 

The block of flash still seems to have been erased properly.

 

It's very simple code:

FTFL_FCCOB0 = 0x09;

FTFL_FCCOB1 = (addr >> 16) & 0xff;

FTFL_FCCOB1 = (addr >> 8) & 0xff;

FTFL_FCCOB1 = (addr) & 0xff;

FTFL_FSTAT |= FTFL_FSTAT_CCIF_MASK;

 

while (!(FTFL_FSTAT & FTFL_FSTAT_CCIF_MASK)) ;

 

Any ideas on how to avoid this error or detect what is causing it?

 

Thanks,

  Peter Steinberg

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