DS2482X-101+T Maxim Integrated Products, DS2482X-101+T Datasheet - Page 9

• Manufacturer Part Number: DS2482X-101+T
• Description: IC MASTER I2C-1WIRE 1CH 9-WLP
• Manufacturer: Maxim Integrated Products

Specifications of DS2482X-101+T

• Controller Type: I²C Bus Controller
• Interface: I²C
• Voltage - Supply: 2.9 V ~ 5.5 V
• Current - Supply: 750µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 9-WLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The DS2482-101 understands eight function com-
mands that fall into four categories: device control, I
communication, 1-Wire setup, and 1-Wire communica-
tion. The feedback path to the host is controlled by a
read pointer, which is set automatically by each func-
tion command for the host to efficiently access relevant
information. The host processor sends these com-
mands and applicable parameters as strings of one or
two bytes using the I
requires that each byte be acknowledged by the
receiving party to confirm acceptance or not be
acknowledged to indicate an error condition (invalid
code or parameter) or to end the communication. See
the I
including acknowledge.
Command Code
Command Parameter
Description
Typical Use
Restriction
Error Response
Command Duration
1-Wire Activity
Read Pointer Position
Status Bits Affected
Configuration Bits Affected
Command Code
Command Parameter
Description
Typical Use
Restriction
Error Response
Command Duration
1-Wire Activity
Read Pointer Position
Status Bits Affected
Configuration Bits Affected
Single-Channel 1-Wire Master with Sleep Mode
2
C Interface section for details of the I
_______________________________________________________________________________________
Function Commands
2
C interface. The I
F0h
None
Performs a global reset of device state machine logic. Terminates any ongoing 1-Wire
communication.
Device initialization after power-up; reinitialization (reset) as desired.
None (can be executed at any time).
None
Maximum 525ns. Counted from falling SCL edge of the command code acknowledge bit.
Ends maximum 262.5ns after the falling SCL edge of the command code acknowledge bit.
Status Register (for busy polling).
RST set to 1; 1WB, PPD, SD, SBR, TSB, DIR set to 0.
1WS, APU, SPU set to 0.
E1h
Pointer Code (see Table 1)
Sets the read pointer to the specified register. Overwrites the read pointer position of any 1-Wire
communication command in progress.
To prepare reading the result from a 1-Wire Read Byte command; random read access of
registers.
None (can be executed at any time).
If the pointer code is not valid, the pointer code is not acknowledged and the command is
ignored.
None. The read pointer is updated on the rising SCL edge of the pointer code acknowledge bit.
Not affected.
As specified by the pointer code.
None
None
2
2
C protocol
C protocol
2
C
The function commands are as follows:
1) Device Reset
2) Set Read Pointer
3) Write Configuration
4) 1-Wire Reset
Table 1. Valid Pointer Codes
Status Register
Read Data Register
Configuration Register
REGISTER SELECTION
5) 1-Wire Single Bit
6) 1-Wire Write Byte
7) 1-Wire Read Byte
8) 1-Wire Triplet
Set Read Pointer
Device Reset
CODE
C3h
E1h
F0h
9