Upon clearing CCIF to launch the Erase Flash Block command, the flash memory
module erases the main array of the selected flash block and verifies that it is erased. The
Erase Flash Block command aborts and sets the FSTAT[FPVIOL] bit if any region
within the block is protected (see the description of the FPROT registers). If the erase
verify fails, FSTAT[MGSTAT0] is set. The CCIF flag will set after the Erase Flash
Block operation has completed.
Table 29-19. Erase Flash Block Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
Program flash is selected and the address is out of program flash range FSTAT[ACCERR]
Flash address is not longword aligned FSTAT[ACCERR]
Any area of the selected flash block is protected FSTAT[FPVIOL]
The selected program flash block contains an XA controlled segment and the Erase All
Blocks or the Read 1s All Blocks command has not successfully completed since the last
reset
FSTAT[FPVIOL]
Any errors have been encountered during the verify operation
1
FSTAT[MGSTAT0]
1. User margin read may be run using the Read 1s Block command to verify all bits are erased.
29.4.11.7 Erase Flash Sector Command
The Erase Flash Sector operation erases all addresses in a flash sector.
Table 29-20. Erase Flash Sector Command FCCOB Requirements
FCCOB Number FCCOB Contents [7:0]
0 0x09 (ERSSCR)
1 Flash address [23:16] in the flash sector to be erased
2 Flash address [15:8] in the flash sector to be erased
3 Flash address [7:0]
1
in the flash sector to be erased
1. Must be phrase aligned (flash address [2:0] = 000).
After clearing CCIF to launch the Erase Flash Sector command, the flash memory
module erases the selected program flash sector and then verifies that it is erased. The
Erase Flash Sector command aborts if the selected sector is protected (see the description
of the FPROT registers). If the erase-verify fails the FSTAT[MGSTAT0] bit is set. The
CCIF flag is set after the Erase Flash Sector operation completes. The Erase Flash Sector
command is suspendable (see the FCNFG[ERSSUSP] bit and Figure 29-6).
Functional Description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
666 NXP Semiconductors
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