DESIGN OF A CUSTOM ASIC INCORPORATING CAN™ AND 1 ...

In June 2004, Maxim Integrated Products introduced the DS2482-X00 I 2 C-to-1 – Wire®
interface devices, bridging a multi-master communication protocol with a single master
communication protocol. The DS2482-X00 is an I 2 C-to-1 – Wire® line driver with one
(DS2482-100) or eight (DS2482-800) channels of independently operated 1 – Wire® I/O ports.
The DS2482 is an I 2 C-to-1 – Wire® bridge device that interfaces directly to standard (100 kHz
max) or fast (400 kHz max) I 2 C masters to perform bidirectional protocol conversion between
the I 2 C master and any downstream 1 – Wire® slave devices. Relative to any attached 1 –
Wire® slave device, the DS2482 is a 1 – Wire® Master. I 2 C is appropriate for peripherals where
simplicity and low manufacturing cost are more important than speed. Some common
applications include: reading hardware monitors and diagnostic sensors, like a CPU thermostat
and fan speed; reading real-time clocks; and turning on and turning off the power supply of
system components. Peripherals can also be added or removed from the I 2 C bus while the
system is running, just like 1 – Wire® devices, which makes it ideal for applications that require
hot swapping of components [13 – 15]. Combining the diverse functionality of 1 – Wire®
devices with the simplicity and low manufacturing cost of I 2 C, reduces the wiring complexity of
any system down to just two wires and gives the system designer greater application diversity.
4.2 Applications
Of the many commercial markets that could potentially benefit from the interfacing of
CAN and 1 – Wire® technologies, two of the most rapidly emerging markets, wearable sensor
technology and automotive electronics and sensors would benefit the most. Other applications
and markets that could benefit include hybrid mining and construction equipment, mobile and
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