mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1094

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

Chapter 26 4 Kbyte EEPROM Module (S12XEETX4KV2)
1094
Sequential
Programming
Decision
Address, Data,
Access Error and
Protection Violation
Check
Bit Polling for
Buffer Empty
Check
Clock Register
Written
Check
Command
Bit Polling for
Command Completion
Check
Buffer Empty Check
Read: ECLKDIV register
1.
2.
3.
Figure 26-19. Example Program Command Flow
yes
Program Command 0x20
Write: ESTAT register
Clear CBEIF 0x80
Write: EEPROM Address
Write: ECMD register
START
EDIVLD
and program Data
Set?
Read: ESTAT register
Read: ESTAT register
Read: ESTAT register
MC9S12XDP512 Data Sheet, Rev. 2.17
yes
ACCERR/
yes
no
yes
CBEIF
CBEIF
no
Write: ECLKDIV register
Word?
CCIF
Set?
Set?
Set?
EXIT
PVIOL
Set?
Next
no
no
yes
yes
no
no
Clear ACCERR/PVIOL 0x30
Write: ESTAT register
NOTE: command write sequence
aborted by writing 0x00 to
ESTAT register.
NOTE: command write sequence
aborted by writing 0x00 to
ESTAT register.
NOTE: ECLKDIV needs to
be set once after each reset.
Freescale Semiconductor