NXP Semiconductors K22F series, Reference Manual, Page: 304 / 1407

Table 13-7. packetType Field (continued)
packetType Name Description
0xA6 kFramingPacketType_Ping Sent to verify the other side is alive. Also used for UART
autobaud.
0xA7 kFramingPacketType_PingResponse A response to Ping; contains the framing protocol version
number and options.
13.3.5.4 Command packet
The command packet carries a 32-bit command header and a list of 32-bit parameters.
Table 13-8. Command Packet Format
Command Packet Format (32 bytes)
Command Header (4 bytes) 28 bytes for Parameters (Max 7 parameters)
Tag Flags Rsvd Param
Count Param1
(32-bit) Param2
(32-bit) Param3
(32-bit) Param4
(32-bit) Param5
(32-bit) Param6
(32-bit) Param7
(32-bit)
byte 0 byte 1 byte 2 byte 3
Table 13-9. Command Header Format
Byte # Command Header Field
0 Command or Response tag The command header is 4 bytes long, with
these fields.
1 Flags
2 Reserved. Should be 0x00.
3 ParameterCount
The header is followed by 32-bit parameters up to the value of the ParameterCount field
specified in the header. Because a command packet is 32 bytes long, only 7 parameters
can fit into the command packet.
Command packets are also used by the target to send responses back to the host. As
mentioned earlier, command packets and data packets are embedded into framing packets
for all of the transfers.
Table 13-10. Commands that are supported
Command Name
0x01 FlashEraseAll
0x02 FlashEraseRegion
0x03 ReadMemory
0x04 WriteMemory
Table continues on the next page...
Functional Description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
304 NXP Semiconductors