After clearing CCIF to launch the Read Resource command, four consecutive bytes are
read from the selected resource at the provided relative address and stored in the FCCOB
register. The CCIF flag sets after the Read Resource operation completes. The Read
Resource command exits with an access error if an invalid resource code is provided or if
the address for the applicable area is out-of-range.
Table 29-15. Read Resource Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
An invalid resource code is entered FSTAT[ACCERR]
Flash address is out-of-range for the targeted resource. FSTAT[ACCERR]
Flash address is not longword aligned FSTAT[ACCERR]
29.4.11.5 Program Longword Command
The Program Longword command programs four previously-erased bytes in the program
flash memory using an embedded algorithm.
CAUTION
A flash memory location must be in the erased state before
being programmed. Cumulative programming of bits (back-to-
back program operations without an intervening erase) within a
flash memory location is not allowed. Re-programming of
existing 0s to 0 is not allowed as this overstresses the device.
Table 29-16. Program Longword Command FCCOB Requirements
FCCOB Number FCCOB Contents [7:0]
0 0x06 (PGM4)
1 Flash address [23:16]
2 Flash address [15:8]
3 Flash address [7:0]
1
4 Byte 0 program value
5 Byte 1 program value
6 Byte 2 program value
7 Byte 3 program value
1. Must be longword aligned (Flash address [1:0] = 00).
Functional Description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
664 NXP Semiconductors
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