RE: mpc555 internal flash programming

You may write to IMMR[FLEN] (SPR 638) bit using the debugger to enable
flash.  If you want flash enabled from reset, yoy have to program the
CMFCFIG word at location 0x00 in shadow flash.
 
- Allan

________________________________

From: [email protected] [mailto:[email protected]] On Behalf
Of Prathamesh
Sent: Monday, September 24, 2007 11:13 AM
To: [email protected]
Subject: [MPC500] mpc555 internal flash programming



Hi,
I am working with mpc555 with Greenhills C compiler. On my board i 
have pulled /RSTCONF to high, i.e hard reset configuration word is 
being read as default 0x00000000. 
I need to write into internal flash of mpc555. For that bit 20 of hard 
reset configuration word should be 1 ie. FLEN should be set.

How can i achieve this with this configuration?

Or the only option in this case is making /RSTCONF as low and read the 
hard reset configuration word from the data lines. Here i will need to 
pull down all the data lines except D20 which i will need to pull up.



 


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