MC9S12C Datasheet, PDF (496/680 Pages) Motorola, Inc – 16-Bit Microcontroller

Chapter 17 16 Kbyte Flash Module (S12FTS16KV1)
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/
yes
PVIOL
Set?
no
Write: Flash Block Address
1. _{and Dummy Data}
2.
Write: FCMD register
Mass Erase Command 0x41
3.
Write: FSTAT register
Clear CBEIF 0x80
Read: FSTAT register
Write: FSTAT register
Clear ACCERR/PVIOL 0x30
Bit Polling for
Command Completion
Check
CCIF
Set?
no
yes
EXIT
Figure 17-25. Example Mass Erase Command Flow
496
MC9S12C-Family / MC9S12GC-Family
Freescale Semiconductor
Rev 01.23