DS2482-100 Dallas Semiconducotr, DS2482-100 Datasheet - Page 17

• Manufacturer Part Number: DS2482-100
• Description: Single-Channel 1-Wire Master
• Manufacturer: Dallas Semiconducotr

I²C Communication Examples
Device Reset, e.g., After Power-Up
This example includes an optional read access to verify the success of the command.
Write Configuration, e.g., Before Starting 1-Wire Activity Power-Up
Case A: 1-Wire Idle (1WB = 0)
This example includes an optional read access to verify the success of the command.
Case B: 1-Wire Busy (1WB = 1)
The master should stop and restart as soon as the DS2482 does not acknowledge the command code.
Set Read Pointer, e.g., to Read from Another Register
Case A: Valid Read Pointer Code
C3h is the valid read pointer code for the Configuration register.
Case B: Invalid Read Pointer Code
E5h is an invalid read pointer code.
1-Wire Reset, e.g., to Begin or End 1-Wire Communication
Case A: 1-Wire Idle (1WB = 0), No Busy Polling to Read the Result
In the first cycle, the master sends the command; then the master waits (Idle) for the 1-Wire Reset to complete. In
the second cycle the DS2482 is accessed to read the result of the 1-Wire Reset from the Status register.
Case B: 1-Wire Idle (1WB = 0), Busy Polling Until the 1-Wire Command is Completed, then Read the Result
Case C: 1-Wire Busy (1WB = 1)
The master should stop and restart as soon as the DS2482 does not acknowledge the command code.
S
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
WCFG
WCFG
1WRS
1WRS
1WRS
DRST
SRP
SRP
A\
A\
A
A
A
A
A
A
<byte>
C3h
E5h
Sr
Sr
P
P
P
17 of 21
AD,1
(Idle)
AD,1
A\
A
A
Repeat until the 1WB bit has changed to 0.
Sr
A
P
P
S
A
<byte>
<byte>
AD,1
AD,1
A\
A
A
A
<byte>
<byte>
<byte>
P
A\
A\
A\
P
P
P