User Manual

PoKeys user manual
55
www.poscope.com
1-wire
1-Wire is a device communications bus system designed by Dallas Semiconductor Corp. that provides
low-speed data, signaling, and power over a single signal wire. 1-Wire is similar in concept to I²C, but
with lower data rates and longer range. It is typically used to communicate with small inexpensive
devices such as digital thermometers and weather instruments.
PoKeys devices support communication with 1-Wire slave devices (without parasitic power supply),
connected to the pin 55 with external pull-up resistor (of approximately 5 kΩ).
Protocol can be tested via PoKeys configuration software. Click on Peripherals > 1-Wire bus test...
The following dialog appears.
Figure 29: 1-Wire protocol test dialog