PICDEM2 datasheet(11/60 Pages) MICROCHIP

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PICDEM 2 User’s Guide

DS30374D-page 6

 2001 Microchip Technology Inc.

2.2 PICDEM 2 as a Stand-alone Board –

Sample Programs

To demonstrate PICDEM 2 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 PIC-

DEM 2 board.

• Make sure there are jumpers on J6 (to enable the LEDs) and J7 (to

enable the on-board RC oscillator).

• Apply power to the PICDEM 2 (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.

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 (i.e., perform a blank check) before

attempting to program it.

Figure 2.2: PIC16C74 Windowed Device

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