Matrix Orbital PK202-25 - Manual (Page 36)

Table 17: 1-Wire Flags
Bit Description
7
6
Unused
5 (0 for future compatibility)
4
3
Add a CRC8 to the end of the transmitted data
2 (0 for future compatibility)
1 Assume last received byte is a CRC8 and validate it
0 Reset bus before transaction
The received data is sent back using the “Display return protocol”.
Table 18: 1-Wire Error Codes
Code Description
0x00 Success
0x01 Unknown 1-Wire Command
0x02 No devices on the bus
0x03 Fatal search error
7.4.2 Search command (254 200 2)
This is used to find the addresses of all 1-Wire devices on the bus. After this command the display will
return one or more “Display return protocol” packets containing either an error code or addresses of 1-wire
packets.
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