Page boundaries for flash block erase - question

[russellsher]

Hi

I am using an MC9S08QE128. Looking at the memory map:

There is an 8064 byte flash block from 0x2080 to 0x3FFF.

If I want to erase a 512 byte block of flash, (I am using doonstack), must the block start at a page boundary such as 0x2100? The RAM space above this block in the memory map is 0x1880 to 0x207F. Can I erase from 0x2080 since this is not the start of a boundary or would I have to erase from 0x2000 ? (which may cause problems, since the ram extends to 0x207F)

thanks

Russell

[kef · Accepted solution]

You can erase sector at 0x2080. This will erase whole 512bytes sector. You'll get erased nonbanked addresses 0x2080..0x21FF, also banked addresses PPAGE=0:0xA000 to PPAGE=0:0xA1FF.

[admin]

many thanks for the reply