Datasheet

Chapter 29 1024 KByte Flash Module (S12XFTM1024K5V2)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 1173
Figure 29-26. Generic Flash Command Write Sequence Flowchart
Write to FCCOBIX register
Write: FSTAT register (to launch command)
Clear CCIF 0x80
Clear ACCERR/FPVIOL 0x30
Write: FSTAT register
yes
no
Access Error and
Protection Violation
Read: FSTAT register
Read: FSTAT register
no
START
yes
Check
CCIF
Set?
FCCOB
ACCERR/
FPVIOL
Set?
EXIT
Write: FCLKDIV register
Read: FCLKDIV register
yes
no
Clock Register
Written
Check
FDIVLD
Set?
no
Bit Polling for
Command Completion
Check
yes
CCIF Set?
to identify specific command
parameter to load.
Write to FCCOB register
to load required command parameter.
yes
no
More
Parameters?
Availability Check
Results from previous Command
Note: FCLKDIV must be set after
each reset