28031 Parallax Inc, 28031 Datasheet - Page 8

• Manufacturer Part Number: 28031
• Description: ADAPTER USB TO SRL RS232 W/CABLE
• Manufacturer: Parallax Inc

Specifications of 28031

• Accessory Type: USB to RS232 Adapter
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: Parallax Motherboards
• For Use With: 28136 - KIT SCRIBBLER ROBOT28138 - BOARD DEV PROFESSIONAL
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pulse Generator (X11)
The PDB pulse generator provides a selectable square-wave output of 1 Hz, 10 Hz, 100 Hz, and 1 kHz.
Frequency selection is by the push-button near the pulse generator output (an LED indicates current
frequency). Be sure that the output of the pulse generator is connected to an input pin only, as this
output is driven both high and low.
RJ-11 Connector (X12)
The RJ-11 connector may be configured for both X-10 output and Maxim/Dallas 1-Wire I/O. For X-10
output when using a PL-513 or TW-523 interface, configure the RJ-11 port as shown on the left (J2 in, J3
out). For 1-Wire I/O using a Blue Dot Receptor, configure the RJ-11 port as shown on the right (J3 in, J2
out).
X10 Output
1-Wire I/O
RS-232 DCE Port (X13)
The RS-232 DCE port allows your project to communicate with a PC or other DTE devices.
The
implementation of the DCE port on the PDB allows for full flow-control (both transmit and receive). Note
that the pin names refer to function, hence X13-RX will connect to the receive pin (e.g., SERIN) of your
project.
Copyright © Parallax, Inc.
Professional Development Board (#28138)
v2.0 9/3/2008 Page 8 of 10