PC312XDP512F0CFVR datasheet(1095/1348 Pages) FREESCALE

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Chapter 26 4 Kbyte EEPROM Module (S12XEETX4KV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

1097

26.4.2.4

Mass Erase Command

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

An example ﬂow to execute the mass erase operation is shown in Figure 26-21. The mass erase command

write sequence is as follows:

1. Write to an EEPROM memory address to start the command write sequence for the mass erase

command. The address and data written will be ignored.

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

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

command.

If the EEPROM memory to be erased contains any protected area, the PVIOL ﬂag in the ESTAT register

will set and the mass erase command will not launch. Once the mass erase command has successfully

launched, the CCIF ﬂag in the ESTAT register will set after the mass erase operation has completed unless

a new command write sequence has been buffered.

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