28138 Parallax Inc, 28138 Datasheet - Page 9

• Manufacturer Part Number: 28138
• Description: BOARD DEV PROFESSIONAL
• Manufacturer: Parallax Inc
• Series: BASIC Stamp®r
• Type: MCUr

Specifications of 28138

• Contents: Development Board
• Processor To Be Evaluated: SX28AC/DP
• Interface Type: RS-232
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: BASIC Stamp®, Javelin Stamp, and SX28AC/DP
• For Use With: 900-00014 - SERVO CONTROLLER PICO GWS130-28029 - KIT PARTS SMART SENSORS27957 - MANUAL USER FOR JAVELIN STAMP28138 - BOARD DEV PROFESSIONAL805-00006 - CABLE USB A TO MINI B27937 - MEMORY STICK DATALOGGER658-1021-5 - PROGRAMMER TEACLIPPER/STAMP30010 - BASIC STAMP LOGIC ANALYZER27220 - BOOK STAMPWORKS27330 - PROGRAMMER STACHE BASIC STAMP27218 - MANUAL BASIC STAMP VER 2.0
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pushbuttons and DIP Switches (X9 and X10)
Eight normally-open pushbuttons and eight DIP switches are made available via connectors X9 and X10.
The buttons and the switches are wired in an active-low configuration, with an I/O pin protection resistor
as shown in the illustration below.
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 follows (J2 in, J3 out):
For 1-Wire I/O using a Blue Dot Receptor, configure the RJ-11 port as follows (J3 in, J2 out):
© Parallax, Inc. • Professional Development Board (#28138) • 06/2005
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