DS2482S-800+ Maxim Integrated Products, DS2482S-800+ Datasheet - Page 19

• Manufacturer Part Number: DS2482S-800+
• Description: IC I2C TO 1WIRE BRIDGE 16SOIC
• Manufacturer: Maxim Integrated Products
• Type: Eight Channel 1 Wire Masterr

Specifications of DS2482S-800+

• Controller Type: I²C Bus Controller
• Interface: I²C
• Voltage - Supply: 3.3 V, 5V
• Current - Supply: 750µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Package: 16SOIC N
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1-Wire Single Bit (To Generate a Single Time Slot on the 1-Wire Line)
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 DS2482-100 does not acknowledge the command code.
1-Wire Write Byte (To Send a Command Code to the 1-Wire Line)
Case A: 1-Wire Idle (1WB = 0), No Busy Polling
33h is the valid 1-Wire ROM function command for Read ROM. The idle time is needed for the 1-Wire function to
complete. There is no data read back from the 1-Wire line with this 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 1-Wire Write Byte command is completed.
Case C: 1-Wire Busy (1WB = 1)
The master should stop and restart as soon as the DS2482-100 does not acknowledge the command code.
S
S
S
S
S
S
AD,0
AD,0
AD,0
AD,0
AD,0
AD,0
______________________________________________________________________________________
A
A
A
A
A
A
1WWB
1WWB
1WWB
1WSB
1WSB
1WSB
A\
A\
A
A
A
A
<byte>
<byte>
33h
33h
S
P
P
AD,1
Single-Channel 1-Wire Master
Sr
Sr
A
A
A
A
I 2 C Communication Examples (continued)
AD,1
AD,1
A
P
P
<byte>
(Idle)
(Idle)
A
A
REPEAT UNTIL THE 1WB BIT
REPEAT UNTIL THE 1WB BIT
HAS CHANGED TO 0.
HAS CHANGED TO 0.
<byte>
<byte>
A\
P
A
A
<byte>
<byte>
A\
A\
P
P
19