NXP Semiconductors KE1xF Series, Reference Manual, Page: 568 / 1483

Table 23-2. Configuration Fields for the Kinetis Bootloader (continued)
Offset Size (bytes) Configuration Field Description
0x28 1 Reserved -
0x29 1 canConfig1 ClkSel[1], PropSeg[3], SpeedIndex[4]
0x2A - 0x2B 2 canConfig2 Pdiv[8], Pseg[3], Pseg2[3], rjw[2]
0x2C - 0x2D 2 canTxId txId
0x2E - 0x2F 2 canRxId rxId
0x30 - 0x33 4 Reserved -
0x34 12 Reserved -
NOTE
The flash sector containing the BCA should not be located in
the execute-only region, because the Kinetis bootloader cannot
read an execute-only region.
The first configuration field 'tag' is a tag value or magic number. The tag value must be
set to 'kcfg' for the bootloader configuration data to be recognized as valid. If tag-field
verification fails, then the Kinetis Bootloader assumes that the flash is not initialized and
uses a predefined default configuration (all as 0xFF). The tag value is treated as a
character string, so bytes 0-3 must be set as shown in the table.
Table 23-3. tag Configuration Field
Offset tag Byte Value
0 'k' (0x6B)
1 'c' (0x63)
2 'f' (0x66)
3 'g' (0x67)
The flags in the clockFlags configuration field are enabled if the corresponding bit is
cleared (0).
Table 23-4. clockFlags Configuration Field
Bit Flag Description
0 HighSpeed Enable high speed mode (i.e., 48 MHz). Read Clock Configuration
section for more information on the high speed mode.
1 - 7 Reserved
Functional Description
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
568 NXP Semiconductors