MC9S12E128CFUE Datasheet, PDF (112/606 Pages) Freescale Semiconductor, Inc – MC9S12E128 Data Sheet

Chapter 2 128 Kbyte Flash Module (FTS128K1V1)
START
Read: FCLKDIV register
Clock Register
Written
Check
FDIVLD
no
Set?
NOTE: FCLKDIV needs to
be set once after each reset.
yes
Write: FCLKDIV register
Read: FSTAT register
Address, Data,
Command
Buffer Empty Check
CBEIF
no
Set?
yes
Access Error and
Protection Violation
Check
ACCERR/
PVIOL
Set?
no
yes
Write: Flash Sector Address
1. _{and Dummy Data}
Write: FSTAT register
Clear ACCERR/PVIOL 0x30
2.
Write: FCMD register
Sector Erase Command 0x40
3.
Write: FSTAT register
Clear CBEIF 0x80
Read: FSTAT register
Bit Polling for
Command Completion
Check
CCIF
Set?
no
yes
EXIT
Figure 2-24. Example Sector Erase Command Flow
MC9S12E128 Data Sheet, Rev. 1.07
112
Freescale Semiconductor