參數(shù)資料
型號(hào): DS2482-800
英文描述: Eight-Channel 1-Wire Master
中文描述: 八通道1-Wire主控制器
文件頁(yè)數(shù): 20/22頁(yè)
文件大?。?/td> 261K
代理商: DS2482-800
DS2482-800: Eight-Channel 1-Wire Master
20 of 22
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
<byte>
A
<byte>
A\
Sr
AD,0
A
SRP
A
E1h
A
Sr
AD,1
A
<byte>
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
<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 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
<byte>
A
Sr
AD,1
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
A
<byte>
A
<byte>
A\
P
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
When 1WB has changed from 1 to 0, the Status Register holds the valid result of the 1-Wire Triplet command.
A
<byte>
A
<byte>
A\
P
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
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