Datasheet

DS2781
28 of 31
Figure 25. Net Address Command Flowchart
MASTER TX
RESET PULSE
DS2781 Tx
PRESENCE PULSE
MASTER Tx NET
ADDRESS
COMMAND
55h
MATCH
33h / 39h
READ
F0h
SEARCH
CCh
SKIP
DS2781 Tx
FAMILY CODE
1 BYTE
DS2781 Tx
SERIAL NUMBER
6 BYTES
DS2781 Tx
CRC
1 BYTE
MASTER TX
BIT 0
BIT 0
MATCH ?
MASTER TX
BIT 1
DS2781 Tx BIT 0
DS2781 Tx BIT 0
MASTER Tx BIT 0
BIT 0
MATCH ?
DS2781 Tx BIT 1
DS2781 Tx BIT 1
MASTER Tx BIT 1
BIT 1
MATCH ?
BIT 1
MATCH ?
MASTER TX
FUNCTION
COMMAND
MASTER TX
BIT 63
DS2781 Tx BIT 63
DS2781 Tx BIT 63
MASTER Tx BIT 63
BIT 63
MATCH ?
MASTER TX
FUNCTION
COMMAND
YES
N
O
N
O
N
O
N
O
YESYES YES
N
O
N
O
N
O
N
O
YESYES
YESYES
N
O
YES
A5h
RESUME
YES
N
O
RESUME
FLAG SET ?
MASTER TX
FUNCTION
COMMAND
YES
N
O
SET
RESUME
FLAG
CLEAR RESUME
CLEAR RESUME
CLEAR RESUME