Cino FA470 - Manual (Page 243)

Command Descriptions
2-228
Host NAK
(ALL)
Descriptions
Host non-acknowledgement
Host NAK message is sent from host to device to indicate that the data received is not correct.
Packet Format
Prefix Opcode Status Length Parameter(s) LRC Suffix
7Eh 90h 10h 00h 00h 00h 04h See below Variable 7Eh
1 Byte 3 Bytes 1 Byte 2 Bytes 4 Bytes 1 Byte 1 Byte
. Host Requirements
There is no response for this message.
. Length
Total size (bytes) of the Parameter(s) field
. LRC
”Opcode” XOR “Status” XOR “Length” XOR “Parameter(s)”
Parameter(s)
< Table 10-2 > Host NAK Parameter(s) Field
Parameter / PID / Size Options Descriptions
Host NAK
PID : <Null>
Size : 00h 04h (4 Bytes)
-XXh XXh…XXh
Indicates the Data Packet ID (See Decode
Data in Chapter 2.2) to which the Host NAK is
replied