S912XHY128F0VLM Datasheet, PDF (601/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

256 KByte Flash Module (S12XFTMR256K1V1)
FCMD
0x0B
0x0D
0x0E
0x10
0x11
0x12
Table 18-28. D-Flash Commands
Command
Unsecure Flash
Set User Margin
Level
Set Field Margin
Level
Erase Verify
D-Flash Section
Program D-Flash
Erase D-Flash
Sector
Function on D-Flash Memory
Supports a method of releasing MCU security by erasing all D-Flash (and P-Flash) blocks
and verifying that all D-Flash (and P-Flash) blocks are erased.
Specifies a user margin read level for the D-Flash block.
Specifies a field margin read level for the D-Flash block (special modes only).
Verify that a given number of words starting at the address provided are erased.
Program up to four words in the D-Flash block.
Erase all bytes in a sector of the D-Flash block.
18.4.2 Flash Command Description
This section provides details of all available Flash commands launched by a command write sequence. The
ACCERR bit in the FSTAT register will be set during the command write sequence if any of the following
illegal steps are performed, causing the command not to be processed by the Memory Controller:
• Starting any command write sequence that programs or erases Flash memory before initializing the
FCLKDIV register
• Writing an invalid command as part of the command write sequence
• For additional possible errors, refer to the error handling table provided for each command
If a Flash block is read during execution of an algorithm (CCIF = 0) on that same block, the read operation
will return invalid data. If the SFDIF or DFDIF flags were not previously set when the invalid read
operation occurred, both the SFDIF and DFDIF flags will be set and the FECCR registers will be loaded
with the global address used in the invalid read operation with the data and parity fields set to all 0.
If the ACCERR or FPVIOL bits are set in the FSTAT register, the user must clear these bits before starting
any command write sequence (see Section 18.3.1.7).
CAUTION
A Flash word or phrase must be in the erased state before being
programmed. Cumulative programming of bits within a Flash word or
phrase is not allowed.
18.4.2.1 Erase Verify All Blocks Command
The Erase Verify All Blocks command will verify that all P-Flash and D-Flash blocks have been erased.
Table 18-29. Erase Verify All Blocks Command FCCOB Requirements
CCOBIX[2:0]
000
FCCOB Parameters
0x01
Not required
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
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