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Can I run a FLASH write routine from FLASH?

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Can I run a FLASH write routine from FLASH?

‎11-20-2008 03:29 PM
1,248 Views
pederalm
Contributor II
Can I erase a part of flash with a program in FLASH? Or do I have to erase flash from a RAMprogram?
 
This is what I like to do:
 
I use the MC9S12XDP512 with 512k flash. I want to store data at page $E8-$EF (block 2, 128k). All other FLASH is for program code. Sometimes I would like to change the data located in block 2. Is it possible to do that with a FLASH routine executing from FLASH or do I have to change the data from a RAM routine? My idea is to have the FLASH routines in the unpaged FLASH area.
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‎11-20-2008 06:10 PM
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Steve
NXP Employee
NXP Employee
Yes, you can erase & program one flash block while running in another. You cannot erase or program the flash block in which you are running.
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