NXP Semiconductors K22F series, Reference Manual, Page: 634 / 1407

The program flash IFR is located within the program flash 0 memory block .
Address Range Size (Bytes) Field Description
0x00 – 0x9F 160 Reserved
0xA0 – 0xA3 4 Program Once XACCH-1 Field
(index = 0x10)
0xA4 – 0xA7 4 Program Once XACCL-1 Field
(index = 0x10)
0xA8 – 0xAB 4 Program Once XACCH-2 Field
(index = 0x11)
0xAC – 0xAF 4 Program Once XACCL-2 Field
(index = 0x11)
0xB0 – 0xB3 4 Program Once SACCH-1 Field
(index = 0x12)
0xB4 – 0xB7 4 Program Once SACCL-1 Field
(index = 0x12)
0xB8 – 0xBB 4 Program Once SACCH-2 Field
(index = 0x13)
0xBC – 0xBF 4 Program Once SACCL-2 Field
(index = 0x13)
0xC0 – 0xFF 64 Program Once ID Field
(index = 0x00 - 0x0F)
29.3.2.1 Program Once Field
The Program Once Field in the program flash IFR provides 96 bytes of user data storage
separate from the program flash main array. The user can program the Program Once
Field one time only as there is no program flash IFR erase mechanism available to the
user. The Program Once Field can be read any number of times. This section of the
program flash IFR is accessed in 4-byte or 8-Byte records using the Read Once and
Program Once commands (see
Read Once Command and Program Once Command ).
29.3.3 Register Descriptions
The flash memory module contains a set of memory-mapped control and status registers.
NOTE
While a command is running (FSTAT[CCIF]=0), register
writes are not accepted to any register except FCNFG and
Memory Map and Registers
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
634 NXP Semiconductors