Upon clearing CCIF to launch the Read 1s Section command, the flash memory module
sets the read margin for 1s according to Table 27-27 and then reads all locations within
the specified section of flash memory. If the flash memory module fails to read all 1s (i.e.
the flash section is not erased), the FSTAT[MGSTAT0] bit is set. The CCIF flag sets
after the Read 1s Section operation completes.
Table 27-27. Margin Level Choices for Read 1s Section
Read Margin Choice Margin Level Description
0x00 Use the 'normal' read level for 1s
0x01 Apply the 'User' margin to the normal read-1 level
0x02 Apply the 'Factory' margin to the normal read-1 level
Table 27-28. Read 1s Section Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
An invalid margin code is supplied FSTAT[ACCERR]
An invalid flash address is supplied FSTAT[ACCERR]
Flash address is not longword aligned FSTAT[ACCERR]
The requested section crosses a Flash block boundary FSTAT[ACCERR]
The requested number of longwords is zero FSTAT[ACCERR]
Read-1s fails FSTAT[MGSTAT0]
27.4.10.2 Program Check Command
The Program Check command tests a previously programmed program flash longword to
see if it reads correctly at the specified margin level.
Table 27-29. Program Check Command FCCOB Requirements
FCCOB Number FCCOB Contents [7:0]
0 0x02 (PGMCHK)
1 Flash address [23:16]
2 Flash address [15:8]
3 Flash address [7:0]
1
4 Margin Choice
8 Byte 0 expected data
9 Byte 1 expected data
A Byte 2 expected data
B Byte 3 expected data
1. Must be longword aligned (Flash address [1:0] = 00).
Functional Description
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
442 Freescale Semiconductor, Inc.
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