Rainbow Electronics DS2482-800 - Manual (Page 20)

DS2482-800: Eight-Channel 1-Wire Master
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Case C: 1-Wire idle (1WB = 0), busy polling until the 1-Wire Command is completed.
S AD,0 A 1WRB A
Sr AD,1 A A A\
Sr AD,0 A SRP A E1h A Sr AD,1 A A\ P
Poll the Status Register until the 1WB bit has changed from 1 to 0. Then set the read pointer to the read data
register (code E1h) and access the device again to read the data byte that was obtained from the 1-Wire IO
channel.
Case D: 1-Wire busy (1WB = 1)
S AD,0 A 1WRB A\ P
The master should stop and restart as soon as the DS2482 does not acknowledge the command code.
1-Wire Single Bit, e. g., to generate a single time slot on a 1-Wire IO channel
Case A: 1-Wire idle (1WB = 0), no busy polling
S AD,0 A 1WSB A A P (Idle)
S AD,1 A 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 single-bit command.
Case B: 1-Wire idle (1WB = 0), busy polling until the 1-Wire Command is completed.
S AD,0 A 1WSB A A
Sr AD,1 A A A\ P
When 1WB has changed from 1 to 0, the Status Register holds the valid result of the 1-Wire Single Bit command.
Case C: 1-Wire busy (1WB = 1)
S AD,0 A 1WSB A\ P
The master should stop and restart as soon as the DS2482 does not acknowledge the command code.
1-Wire Triplet, e.g., to perform a Search ROM function on a 1-Wire IO channel
Case A: 1-Wire idle (1WB = 0), no busy polling
S AD,0 A 1WT A A P (Idle)
S AD,1 A 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 A
Sr AD,1 A A A\ P
When 1WB has changed from 1 to 0, the Status Register holds the valid result of the 1-Wire Triplet command.
Repeat until the 1WB
bit has changed to 0
Repeat until the 1WB
bit has changed to 0
Repeat until the 1WB
bit has changed to 0