Datasheet

Chapter 29 128 Kbyte Flash Module (S12XFTX128K1V1)
MC9S12XDP512 Data Sheet, Rev. 2.21
1214 Freescale Semiconductor
Figure 29-23. Example Erase Verify Command Flow
Write: Flash Block Address
Write: FCMD register
Erase Verify Command 0x05
Write: FSTAT register
Clear CBEIF 0x80
1.
2.
3.
Clear ACCERR/PVIOL 0x30
Write: FSTAT register
yes
no
Access Error and
Protection Violation
no
and Dummy Data
Bit Polling for
Command Completion
Check
Read: FSTAT register
yes
Read: FSTAT register
no
START
yes
Check
CBEIF
Set?
Address, Data,
Command
Buffer Empty Check
CCIF
Set?
ACCERR/
PVIOL
Set?
no
Erase Verify
Status
yes
EXIT
Flash Block
Not Erased
EXIT
Flash Block
Erased
BLANK
Set?
Write: FCLKDIV register
Read: FCLKDIV register
yes
no
Clock Register
Written
Check
FDIVLD
Set?
NOTE: FCLKDIV needs to
be set once after each reset.