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14 Appendix D: The SX Tech Board
14 Appendix D: The SX Tech Board
The Parallax SX Tech Board is a learning tool for 28-pin DIP SX microcontrollers. The led28.src file,
included with the SX-Key installation program, demonstrates a simple program using the SX Tech
Board and the SX28 microcontroller.
Figure 17 - The SX Tech Board
Power
Jack
4-pin Programming
Header
Power
Indicator
Resonator
Socket
Breadboard
Prototyping
Area
SX microcontroller (28-pin DIP) properly
inserted into LIF socket.
Reset
Button
14.1 SX Tech Board Features
The SX Tech Board contains a socket and breadboard area to make development with the 28-pin SX DIP
microcontroller easier. The SX Tech Board only supports the SX-28 chip.
The SX Tech Board contains the following items:
• 7.5 VDC, 1A center positive power supply input
• Power indicator (LED)
• 28-pin LIF socket
• 50 MHz ceramic resonator (in 3-pin socket)
SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc. • Page 145