ds2482-800 Maxim Integrated Products, Inc., ds2482-800 Datasheet - Page 20

• Manufacturer Part Number: ds2482-800
• Description: Eight-channel 1-wire Master
• Manufacturer: Maxim Integrated Products, Inc.

Case C: 1-Wire idle (1WB = 0), busy polling until the 1-Wire Command is completed.
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)
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
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.
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)
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
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.
When 1WB has changed from 1 to 0, the Status Register holds the valid result of the 1-Wire Triplet command.
Sr
S
S
S
S
S
S
S
AD,0
AD,0
AD,0
AD,0
AD,0
AD,0
AD,0
AD,0
A
A
A
A
A
A
A
A
1WRB
1WRB
1WSB
1WSB
1WSB
SRP
1WT
1WT
A\
A\
A
A
A
A
A
A
Sr
Sr
Sr
S
S
<byte>
<byte>
<byte>
<byte>
E1h
P
P
AD,1
AD,1
AD,1
AD,1
AD,1
20 of 23
A
A
A
A
A
A
A
A
A
A
Sr
P
P
<byte>
<byte>
<byte>
<byte>
<byte>
(Idle)
(Idle)
AD,1
A\
A\
A
A
A
A
<byte>
<byte>
<byte>
P
P
<byte>
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
A\
A\
A\
A\
P
P
P