mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1172

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

Chapter 28 256 Kbyte Flash Module (S12XFTX256K2V1)
1172
Clock Register
Written
Check
Address, Data,
Access Error and
Protection Violation
Check
Simultaneous
Multiple Flash Block
Decision
Bit Polling for
Command Completion
Check
Erase Verify
Command
Buffer Empty Check
Status
Read: FCLKDIV register
1.
2.
3.
Figure 28-25. Example Erase Verify Command Flow
yes
START
Write: Flash Block Address
Write: FCMD register
Erase Verify Command 0x05
Write: FSTAT register
Clear CBEIF 0x80
FDIVLD
and Dummy Data
Set?
Read: FSTAT register
Read: FSTAT register
MC9S12XDP512 Data Sheet, Rev. 2.17
yes
ACCERR/
no
yes
yes
CBEIF
BLANK
no
Write: FCLKDIV register
Block?
CCIF
Set?
Set?
PVIOL
Set?
Flash
EXIT Flash Block
Set?
Next
no
Erased
yes
no
yes
no
no
Write: FSTAT register
Clear ACCERR/PVIOL 0x30
Decrement Global Address
by 128K (skip unimplemented Flash)
NOTE: FCLKDIV needs to
be set once after each reset.
EXIT
Flash Block
Not Erased
Freescale Semiconductor