mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1063
mc9s12xd256
Manufacturer Part Number
mc9s12xd256
Description
Hcs12x Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XD256.pdf
(1350 pages)
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Clock Register
Written
Check
Address, Data,
Access Error and
Protection Violation
Check
Command
Buffer Empty Check
Bit Polling for
Command Completion
Check
Read: ECLKDIV register
1.
2.
3.
Figure 25-21. Example Mass Erase Command Flow
yes
START
Write: EEPROM Address
Write: ECMD register
Mass Erase Command 0x41
Write: ESTAT register
Clear CBEIF 0x80
EDIVLD
and Dummy Data
Set?
Read: ESTAT register
Read: ESTAT register
MC9S12XDP512 Data Sheet, Rev. 2.17
yes
ACCERR/
yes
no
CBEIF
Write: ECLKDIV register
Set?
CCIF
PVIOL
Set?
Set?
EXIT
no
no
yes
no
Clear ACCERR/PVIOL 0x30
Write: ESTAT register
NOTE: ECLKDIV needs to
be set once after each reset.
NOTE: command write sequence
aborted by writing 0x00 to
ESTAT register.
NOTE: command write sequence
aborted by writing 0x00 to
ESTAT register.
Chapter 25 2 Kbyte EEPROM Module (S12XEETX2KV1)
1063
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