NXP Semiconductors K22F series - Page 333

Wait
for ACK
No
Yes
End
No
Process NAK
Yes
Report an error
No
Yes
No
Reached
maximum
Report a timeout
error
Yes
0x5A
received?
0xA2
received?
0xA1
received?
Wait for 1 byte
from target
Wait for 1 byte
from target
retries?
Figure 13-24. Host reads an ACK from target via UART
Wait for
ping response
Yes
Yes
End
Report Error
No
No
Wait for 1 byte
from target
Wait for 1 byte
from target
0x5A
received?
0xA7
received?
Wait for
remaining bytes
of ping response
packet
Figure 13-25. Host reads a ping response from target via UART
Chapter 13 Kinetis Flashloader
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 333