NXP Semiconductors Kinetis KE1xZ256, Reference Manual

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16.4.2 Program flash 0 IFR map
The program flash 0 IFR is a 1 Kbyte nonvolatile information memory that can be read
freely, but the user has no erase and limited program capabilities (see the Read Once,
Program Once, and Read Resource commands in
Read Once Command , Program Once
command and Read Resource Command ). The contents of the program flash 0 IFR are
summarized in the following table and further described in the subsequent paragraphs.
The program flash 0 IFR is located within the program flash 0 memory block.
Address Range Size (Bytes) Field Description
0x000 – 0x39F 928 Reserved
0x3A0 – 0x3A3 4 Program Once XACCH-1 Field (index =
0x08)
0x3A4 – 0x3A7 4 Program Once XACCL-1 Field (index =
0x08)
0x3A8 – 0x3AB 4 Program Once XACCH-2 Field (index =
0x09)
0x3AC – 0x3AF 4 Program Once XACCL-2 Field (index =
0x09)
0x3B0 – 0x3B3 4 Program Once SACCH-1 Field (index =
0x0A)
0x3B4 – 0x3B7 4 Program Once SACCL-1 Field (index =
0x0A)
0x3B8 – 0x3BB 4 Program Once SACCH-2 Field (index =
0x0B)
0x3BC – 0x3BF 4 Program Once SACCL-2 Field (index =
0x0B)
0x3C0 – 0x3FF 64 Program Once ID Field (index = 0x00 -
0x07)
16.4.2.1 Program Once field
The Program Once field in the program flash 0 IFR provides 96 bytes of user data storage
separate from the program flash 0 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 0 IFR is accessed in 8 byte records using the Read Once and Program
Once commands (see
Read Once Command and Program Once command ).
Memory map and registers
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
290 NXP Semiconductors