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

CHAPTER 4
THE CHALLENGES OF INTERFACING CAN AND 1 – WIRE® COMMUNICATION
4.1 The Need for the Interface
PROTOCOLS
With each passing year, an increasing number of electronic devices need to be
interconnected with an end goal of providing better system accuracy and added functionality
such as remote management and remote diagnostic and maintenance capabilities. At the
backbone of these automated and interconnected systems, there needs to be robust and reliable
communications. Both CAN and 1 – Wire® are serial bus protocols allowing the transfer of
data between master and slave devices. Having a transparent interface between the two
protocols would allow a system designer to take full advantage of the robustness and flexibility
of both technologies. Additionally, by combining the simplicity and cost of CAN-enabling a
device with the multitude of 1 – Wire® devices commercially available, the savings to a system
designer becomes two-fold: reduced complexity of wiring harnesses and increased features and
functionality of the overall system.
Just as CAN is emerging for use in medical equipment, 1 – Wire® devices are also
being used for medical consumable IDs such as medical sensors (ID and calibration), blood
glucose strips (calibration and authentication), and reagent bottles (ID). 1 – Wire® devices are
also ideally suited for use in test equipment and mobile machines. Examples include: PCB
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