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

2.1 History of 1 – Wire®
CHAPTER 2
1 – WIRE® COMMUNICATION PROTOCOL
The Dallas 1 – Wire® bus architecture has been around for more than a decade.
Historically, the 1 – Wire® network was envisioned as a single twisted pair (data line and ground
reference) routed throughout the area of interest with 1 – Wire® slaves connected as shown in
Figure 2.1. It was originally designed to facilitate communication with nearby devices on a short
connection. 1 – Wire® was also a way to add auxiliary memory on a single microprocessor port
pin. As the use of 1 – Wire® devices increased, methods were developed to extend the protocol
to network applications well beyond the size of a printed circuit board [4]. The 1 – Wire®
system is sometimes also referred to as MicroLAN or iButton. Figure 2.1 shows a simple 1
– Wire® network topology.
Figure 2.1 1 – Wire® Network.
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