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MCF51QE128 MCU Series Reference Manual, Rev. 3
82 Freescale Semiconductor
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Chapter 4 Memory
If an address to be programmed is in a protected area of the flash block, FSTAT[FPVIOL] sets and the
program command does not launch. After the program command has successfully launched and the
program operation has completed, FSTAT[FCCF] is set.
Figure 4-11. Example Program Command Flow
Write: Flash Array Address
Write: FCMD register
Write: FSTAT register
1.
2.
3.
Write: FSTAT register
yes
no
Access Error and
no
Bit Polling for
Read: FSTAT register
yes
Read: FSTAT register
no
START
yes
FCBEF
Set?
Command
FCCF
Set?
FACCERR/FPVIOL
Set?
Write: FCDIV register
Read: FCDIV register
yes
no
Clock Register
FDIVLD
Set?
Note: FCDIV needs to
Written
Check
Protection Violation
Check
Buffer Empty Check
and Program Data
Program Command 0x20
Clear FCBEF 0x80
Clear FACCERR/FPVIOL 0x30
Command Completion
Check
EXIT
be set after each reset