Freescale Semiconductor EETX4K Manual do Utilizador descarregar pdf (Página 33)

Block Guide — S12EETX4KV0 V00.04

An example flow to execute the sector erase operation is shown in Figure 4-4. The sector erase command

write sequence is as follows:

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

command. The EEPROM address written determines the sector to be erased while global address

bits [1:0] and the data written are ignored.

2. Write the sector erase command, $40, to the ECMD register.

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

command.

If an EEPROM sector to be erased is in a protected area of the EEPROM memory, the PVIOL flag in the

ESTAT register will set and the sector erase command will not launch. Once the sector erase command

has successfully launched, the CCIF flag in the ESTAT register will set after the sector erase operation has

completed unless a new command write sequence has been buffered.

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Freescale Semiconductor EETX4K Manual do Utilizador Página 33