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

In conclusion, the prototype system design presented in this manuscript is comprised of a
fully-functional 1 – Wire® Bus Master and a CAN 2.0B compliant CAN Controller. It has
successfully been shown that data from a 1 – Wire® network can be sent to a CAN bus node
and that data can be requested by a 1 – Wire® Bus Master from a CAN bus node. In fact, data
has been stored on a DS1996 iButton that was received from the result of an A/D conversion
on a CAN bus node.
Minor issues that still need to be addressed are as follows: hot-swapping of CAN
Controller nodes, hot-swapping of 1 – Wire® devices in overdrive mode while receiving data
from the CAN bus, receiving requested data from multiple CAN nodes for 1 – Wire®
devices, and hot-swapping of both 1 – Wire® and CAN nodes. Given time and resources
these issues and many more can be addressed and solved to yield a fully integrated 1 – Wire®
Master/CAN, CAN/1 – Wire® Master.
The prototype system presented in this manuscript would no doubt be of great benefit to
wearable medical technology and devices and hybrid-electric vehicle technology applications.
By utilizing serial communications, the pin count for a robust, reliable communication backbone
is kept to a minimum. This would keep both the wiring cost and complexity to implement such a
system to a minimum. With the low-cost and ease of CAN-enabling almost any device, the
combinations of sensor networks that could be designed for both application markets is infinite
and is only limited by the creativity of the system designer. Combine this with the variety of
both current in-production 1 – Wire® devices and those not currently in production but still
readily available, and almost any application or system can be implemented. Taking all of this
into account and the limited FPGA resources utilized in the design presented in this manuscript,
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