NXP Semiconductors K22F series - Page 313

13.3.6.4 FlashEraseAll command
The FlashEraseAll command performs an erase of the entire flash memory. If any flash
regions are protected, then the FlashEraseAll command will fail and return an error status
code. Executing the FlashEraseAll command will release flash security if it (flash
security) was enabled, by setting the FTFA_FSEC register. However, the FSEC field of
the flash configuration field is erased, so unless it is reprogrammed, the flash security will
be re-enabled after the next system reset. The Command tag for FlashEraseAll command
is 0x01 set in the commandTag field of the command packet.
The FlashEraseAll command requires no parameters.
Process command
Host
Target
FlashEraseAll
0x5a a4 04 00 c4 2e 01 00 00 00
0x5a a4 0c 00 53 63 a0 00 04 02 00 00 00 00 01 00 00 00
ACK:
0x5a a1
ACK:
0x5a a1
Generic Response:
Figure 13-9. Protocol Sequence for FlashEraseAll Command
Table 13-24. FlashEraseAll Command Packet Format (Example)
FlashEraseAll Parameter Value
Framing packet start byte 0x5A
packetType 0xA4, kFramingPacketType_Command
length 0x04 0x00
crc16 0xC4 0x2E
Command packet commandTag 0x01 - FlashEraseAll
flags 0x00
reserved 0x00
parameterCount 0x00
MemoryID • If MemoryID = 0x00h, then internal flash.
• If MemoryID = 0x01h, then QSPI0 memory.
Chapter 13 Kinetis Flashloader
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 313