mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1139

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

Freescale Semiconductor
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
1.
2.
3.
Figure 27-29. Example Sector Erase Command Flow
yes
Sector Erase Command 0x40
Write: FSTAT register
Clear CBEIF 0x80
START
Write: Flash Sector Address
Write: FCMD register
FDIVLD
and Dummy Data
Set?
Read: FSTAT register
Read: FSTAT register
MC9S12XDP512 Data Sheet, Rev. 2.17
yes
ACCERR/
yes
no
CBEIF
Write: FCLKDIV register
Block?
no
CCIF
Set?
Set?
EXIT
PVIOL
Set?
Flash
Next
no
no
yes
yes
no
Clear ACCERR/PVIOL 0x30
Write: FSTAT register
by 128K
Decrement Global Address
NOTE: FCLKDIV needs to
be set once after each reset.
Chapter 27 512 Kbyte Flash Module (S12XFTX512K4V2)
1139