28830 Parallax Inc, 28830 Datasheet - Page 10

• Manufacturer Part Number: 28830
• Description: Interface Modules & Development Tools Propeller Servo Controller
• Manufacturer: Parallax Inc

Specifications of 28830

• Interface Type: USB, Serial
• Data Bus Width: 8 bit
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Hardware Reset Button
Some of the program examples above require the PSCU to be reset or power cycled before the settings
will take effect. Pressing the reset button will restart the firmware, effectively resetting the PSCU.
Networking Two PSCU Modules for 32 Channels (Microcontroller)
The PSCU is capable of networking to a second PSCU to allow control of 32 servos from a single serial
line when using a microcontroller. The second PSCU would have its Port Mode set to 1 and would
respond to commands sent to servo channels 16 – 31. A typical connection for doing this using the
Board of Education and two PSCU modules is shown below. Note the positions of the cables in the serial
connectors on each PSCU.
Both PSCU modules will get power from the Board of Education in this
manner and both will share the serial I/O line as well. Both PSCU modules will still require a separate
power supply for the servos.
Note: Networking/Daisy-chaining of PSCU modules is not supported when using a USB connection. For
USB control you will need a separate USB port for each unit and all units will be set to Port Mode 0.
Copyright © Parallax Inc.
Propeller Servo Controller USB (#28830)
v1.0 8/24/2009 Page 10 of 12