NXP Semiconductors K32 L2A Series, Reference Manual, Page: 282 / 1379

Table 14-36. FlashProgramOnce Command Packet Format (Example) (continued)
FlashProgramOnce Parameter Value
byteCount 0x0000_0004
data 0x1234_5678
Response: upon successful execution of the command, the target (Kinetis Bootloader)
will return a GenericResponse packet with a status code set to kStatus_Success, or to an
appropriate error status code.
14.3.8.11 FlashReadOnce command
The FlashReadOnce command returns the contents of the program once field by given
index and byte count. The FlashReadOnce command uses 2 parameters: index and
byteCount.
Table 14-37. Parameters for FlashReadOnce Command
Byte # Parameter Description
0 - 3 index Index of the program once field (to read from)
4 - 7 byteCount Number of bytes to read and return to the caller
Host
Target
Process
Command
ACK: 0x5A A1
ACK: 0x5A A1
0x5A A4 0C 00 C1 A5 0F 00 00 02 00 00 00 00 04 00 00 00
0x5A A4 10 00 3F 6F AF 00 00 03 00 00 00 00 04 00 00 00 78 56 34 12
Generic Response
FlashReadOnce: index=0, byteCount=4
Figure 14-15. Protocol Sequence for FlashReadOnce Command
Functional Description
K32 L2A Reference Manual, Rev. 2, 01/2020
282 NXP Semiconductors