mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 74

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Memory
4.4.4.4
The sector erase operation will erase all addresses in a 1 KB sector of flash memory using an embedded
algorithm.
An example flow to execute the sector erase operation is shown in
write sequence is as follows:
If a flash sector to be erased is in a protected area of the flash block, the FPVIOL flag in the FSTAT register
will set and the sector erase command will not launch. Once the sector erase command has successfully
launched, the FCCF flag in the FSTAT register will set after the sector erase operation has completed.
4-30
1. Write to an aligned flash block address to start the command write sequence for the sector erase
2. Write the sector erase command, 0x40, to the FCMD register.
3. Clear the FCBEF flag in the FSTAT register by writing a 1 to FCBEF to launch the sector erase
command. The flash address written determines the sector to be erased while the data written is
ignored.
command.
Sector Erase Command
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure
4-13. The sector erase command
Freescale Semiconductor