Datasheet

26Maxim Integrated
DS2483
Single-Channel 1-Wire Master
with Adjustable Timing and Sleep Mode
I
2
C Communication Examples (continued)
1-Wire Triplet (To Perform a Search ROM Function on 1-Wire Line)
Case A: 1-Wire Idle (1WB = 0), No Busy Polling
S
AD,0 A 1WT A <byte> A P (Idle)
S AD,1 A <byte> A\ P
The idle time is needed for the 1-Wire function to complete. Then access the device in read mode to get the result
from the 1-Wire Triplet command.
Case B: 1-Wire Idle (1WB = 0), Busy Polling Until the 1-Wire Command is Completed
S AD,0 A 1WT A <byte> A
Sr AD,1 A<byte> A <byte> A\ P
Repeat until the 1WB bit
has changed to 0.
When 1WB has changed from 1 to 0, the Status register holds the valid result of the 1-Wire Triplet command.
Case C: 1-Wire Busy (1WB = 1)
S AD,0 A 1WT A\ P
The master should stop and restart as soon as the DS2483 does not acknowledge the command code.