Petter Gustad

MCF52235: EzPort write enable

Discussion created by Petter Gustad on Sep 11, 2007
Latest reply on Sep 16, 2007 by Petter Gustad
I can read FLASH data through the EzPort just fine. However, if I try
to set the write enable bit by issuing a WREN(0x6) command, the status
register read back using RDSR(0x5) does not return anything but zero.
As you see from the enclosed analyzer waveforms I send 0x06, 0x05, and
0x00 (EZBYTE1,2, and 3) but the output is zero.

I've also tried to do a RDSR in a loop, but I still only get zero as
output. I have no problem of issuing a READ(0x3) to read data from the
FLASH. I'm using the M52235EVB board. Any ideas or pointers to
documentation/erratas?


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