Upon clearing CCIF to launch the Program Longword command, the flash memory
module programs the data bytes into the flash using the supplied address. The targeted
flash locations must be currently unprotected (see the description of the FPROT registers)
to permit execution of the Program Longword operation.
The programming operation is unidirectional. It can only move NVM bits from the erased
state ('1') to the programmed state ('0'). Erased bits that fail to program to the '0' state are
flagged as errors in FSTAT[MGSTAT0]. The CCIF flag is set after the Program
Longword operation completes.
The supplied address must be longword aligned (flash address [1:0] = 00):
• Byte 3 data is written to the supplied byte address ('start'),
• Byte 2 data is programmed to byte address start+0b01,
• Byte 1 data is programmed to byte address start+0b10, and
• Byte 0 data is programmed to byte address start+0b11.
Table 29-17. Program Longword Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
An invalid flash address is supplied FSTAT[ACCERR]
Flash address is not longword aligned FSTAT[ACCERR]
Flash address points to a protected area FSTAT[FPVIOL]
Flash address is located in 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 FSTAT[MGSTAT0]
29.4.11.6 Erase Flash Block Command
The Erase Flash Block operation erases all addresses in a single program flash.
Table 29-18. Erase Flash Block Command FCCOB Requirements
FCCOB Number FCCOB Contents [7:0]
0 0x08 (ERSBLK)
1 Flash address [23:16] in the flash block to be erased
2 Flash address [15:8] in the flash block to be erased
3 Flash address [7:0]
1
in the flash block to be erased
1. Must be longword aligned (Flash address [1:0] = 00).
Chapter 29 Flash Memory Module (FTFA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 665
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