mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1182

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 28 256 Kbyte Flash Module (S12XFTX256K2V1)
1182
Clock Register
Written
Check
Address, Data,
Access Error and
Protection Violation
Check
Simultaneous
Multiple Flash Block
Decision
Command
Bit Polling for
Command Completion
Check
Buffer Empty Check
Read: FCLKDIV register
Figure 28-30. Example Mass Erase Command Flow
1.
2.
3.
yes
Write: FCMD register
Mass Erase Command 0x41
Write: FSTAT register
Clear CBEIF 0x80
START
FDIVLD
Write: Flash Block Address
and Dummy Data
Set?
Read: FSTAT register
MC9S12XDP512 Data Sheet, Rev. 2.17
Read: FSTAT register
yes
ACCERR/
yes
no
CBEIF
no
Write: FCLKDIV register
Block?
CCIF
Set?
Set?
EXIT
PVIOL
Set?
Flash
Next
no
yes
no
yes
no
Clear ACCERR/PVIOL 0x30
Write: FSTAT register
by 128K (skip unimplemented Flash)
Decrement Global Address
NOTE: FCLKDIV needs to
be set once after each reset.
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