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DS28E17 Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # DS28E17
Description  Low Power Consumption
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS28E17 Datasheet(HTML) 7 Page - Maxim Integrated Products

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Detailed Description
The DS28E17 combines a 1-Wire front end, an I2C bus
controller, and functionality to bridge these two interfaces
for data communication in a single chip. Data is trans-
ferred serially through the 1-Wire protocol, which requires
only a single data lead and a ground return for signaling.
The DS28E17 has a transparent buffer to write and read
to the I2C bus controller. I2C data is written and read back
by sending 1-Wire packets. As well, a ROM ID acces-
sible from 1-Wire command protocol guarantees unique
identification and is also used to address the device in
a multidrop 1-Wire network environment, where multiple
devices reside on a common 1-Wire bus and operate
independently of each other.
Overview
Figure 1 shows the hierarchical structure of the 1-Wire
protocol. The bus master must first provide one of the
seven ROM function commands: Read ROM, Match
ROM, Search ROM, Skip ROM, Resume, Overdrive-Skip
ROM, or Overdrive-Match ROM. Upon completion of an
Overdrive-Skip ROM or Overdrive-Match ROM command
byte executed at standard speed, the device enters over-
drive mode where all subsequent communication occurs
at a higher speed.
All data is read and written least
significant bit first.
Figure 1. Hierarchical Structure for 1-Wire Protocol
DS28E17
1-Wire-to-I2C Master Bridge
www.maximintegrated.com
Maxim Integrated │ 7
Pin Description (continued)
PIN
NAME
TYPE
FUNCTION
15
SCL
Output
I2C Serial-Clock. Must be connected to the I2C bus supply voltage through a pullup
resistor.
16
SDA
IO
I2C Serial-DataInput/Output. Must be connected to the I2C bus supply voltage through a
pullup resistor.
EP
Exposed Pad. Solder or thermally connect the Exposed Pad to GND or an electrically
unconnected pad to achieve specified thermal characteristics.
1-Wire ROM FUNCTION
COMMANDS
DS28E17-SPECIFIC DEVICE
COMMANDS
READ ROM [33h]
MATCH ROM [55h]
SEARCH ROM [F0h]
SKIP ROM [CCh]
RESUME [A5h]
OVERDRIVE SKIP [3Ch]
OVERDRIVE MATCH [69h]
WRITE DATA WITH STOP [4Bh]
WRITE DATA NO STOP [5Ah]
WRITE DATA ONLY [69h]
WRITE DATA ONLY WITH STOP [78h]
READ DATA WITH STOP [87h]
WRITE, READ DATA WITH STOP [2Dh]
WRITE CONFIGURATION [D2h]
READ CONFIGURATION [E1h]
ENABLE SLEEP MODE [1Eh]
READ DEVICE REVISION [C3h]
AVAILABLE COMMANDS
DS28E17 COMMAND LEVEL:
DATA FIELD AFFECTED:
64-BIT REG. #, RC-FLAG
64-BIT REG. #, RC-FLAG
64-BIT REG. #, RC-FLAG
RC-FLAG
RC-FLAG
RC-FLAG, OD-FLAG
64-BIT REG. #, RC-FLAG, OD-FLAG
S, AD_0, xxh, P
S, AD_0, xxh
xxh,
xxh, P
S, AD_1, [xxh], P
S, AD_0, xxh, P, S, AD_1, [xxh], P
WRITE SPD BITS
READ SPD BITS
SLEEP ON, WAKEUP LOOKS FOR EDGE
READ MAJOR AND MINOR REVISION


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