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PICDEM-1 User’s Guide
2.2
PICDEM-1 as a Stand-alone Board –
Sample Programs
To demonstrate PICDEM-1 operation with one of the sample programs, the
sample device will have to be erased and reprogrammed. Once the device
has been reprogrammed:
? Make sure the sample device is in the appropriate socket on the
PICDEM-1 board.
? Make sure there is a jumper on J3 (to enable the on-board RC oscilla-
tor).
? Apply power to the PICDEM-1 (Figure 2.1). For information on accept-
able power sources, see Appendix A.
? Consult the appropriate chapter in this document for information on the
execution of each demo.
2.2.1
DS33015C-page 6
Erasing the Sample Device
To erase an EPROM device:
? Remove any labels covering the device window. If you do not have a
windowed device (Figure 2.2), you cannot reprogram it. A windowed
version of all EPROM devices may be ordered by requesting the JW
package.
? Place the device in an Ultraviolet (UV) EPROM Eraser. The amount of
time required to completely erase a UV erasable device depends on:
the wavelength of the light, its intensity, distance from UV source, and
the process technology of the device (how small are the memory cells).
? Verify that the device is blank (e.g., perform a blank check) before
attempting to program it.
Figure 2.2: Windowed Device
? 1999 Microchip Technology Inc.
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