MC9S12XD256MAL Datasheet, PDF (1258/1348 Pages) Freescale Semiconductor, Inc – Freescale’s Scalable Controller Area Network

Appendix A Electrical Characteristics
A.3.1.3 Sector Erase
Erasing a 1024-byte Flash sector or a 4-byte EEPROM sector takes:
tera ≈ 4000 ⋅ _{f--N-----V----M1------O-----P--}
The setup time can be ignored for this operation.
A.3.1.4 Mass Erase
Erasing a NVM block takes:
tmass ≈ 20000 ⋅ _{f--N-----V----M1------O-----P--}
The setup time can be ignored for this operation.
A.3.1.5 Blank Check
The time it takes to perform a blank check on the Flash or EEPROM is dependant on the location of the
first non-blank word starting at relative address zero. It takes one bus cycle per word to verify plus a setup
of the command.
tcheck ≈ location ⋅ tcyc + 10 ⋅ tcyc
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MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor