RE: Re: PEMicro PPCBDM strange behaviour

keep in mind when using the internal flash reset config word, that bit
20 becomes /HC (Has Configuration - active low) and has an inverted
polarity than FLEN (used on the external data bus reset configuration
word).
 
FLEN enables the flash when high
/HC means that the internal flash has a valid boot configuration and
should be used

________________________________

From: [email protected] [mailto:[email protected]] On Behalf
Of Dobbin Allan-r11834
Sent: Wednesday, February 07, 2007 9:21 AM
To: [email protected]
Subject: RE: [MPC500] Re: PEMicro PPCBDM strange behaviour



Glad to be of help. Keep in mind that this bit is controlled out of
reset by your reset configuration word. Once you move away from the
debugger and want to boot from flash, you have to ensure this bit is set
by the hardware after a reset. Good practise is to have the debugger
initialise as little as possible so when you run without it (or switch
debuggers), you'll have less to take care of. For the IMMR[FLEN] bit,
you have to pre-condition DATA[20] or program the UC3FCFIG in shadow
flash, depending on RSTCONF.

- Allan


.
 
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