PC312XDP512F0CFVR datasheet(1179/1348 Pages) FREESCALE

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Chapter 28 256 Kbyte Flash Module (S12XFTX256K2V1)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

1181

28.4.2.5

Mass Erase Command

The mass erase operation will erase all addresses in a Flash block using an embedded algorithm.

An example ﬂow to execute the mass erase operation is shown in Figure 28-30. The mass erase command

write sequence is as follows:

1. Write to a Flash block address to start the command write sequence for the mass erase command.

The address and data written will be ignored. Multiple Flash blocks can be simultaneously mass

erased by writing to the same relative address in each Flash block.

2. Write the mass erase command, 0x41, to the FCMD register.

3. Clear the CBEIF ﬂag in the FSTAT register by writing a 1 to CBEIF to launch the mass erase

command.

If a Flash block to be erased contains any protected area, the PVIOL ﬂag in the FSTAT register will set and

the mass erase command will not launch. Once the mass erase command has successfully launched, the

CCIF ﬂag in the FSTAT register will set after the mass erase operation has completed unless a new

command write sequence has been buffered.

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