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dsPICDEM? 1.1 Development Board User’s Guide
3.6
BOARD SELF-TEST CODE MODULE SUMMARY
The Board Self-test Code module can be used to check that peripheral elements used
by the main demonstration program are operating correctly.
To run this code module:
1. Apply power to the dsPICDEM 1.1 Development Board,
2. Press and hold down switch SW1 while pressing and releasing the Reset switch.
3. Release SW1.
At this point, the dsPIC device enters into a basic test code execution loop while
displaying the test code results on the LCD. The following data is displayed on the LCD:
? RP1-RP3 – As the potentiometers are rotated through their range, the displayed
value will vary from 0 to 0FFF.
? When SW1-SW4 are depressed, LED1-LED4 should light, respectively.
? At 25°C/77°F, the temperature sensor will yield a count of approximately
26x-27x. Touching U9 (TC1047A temperature sensor) should increase this count.
? A running counter is being sent to the Codec and read back when pins 2 and 3 of
J12 are connected together. There is an attenuation factor and a large phase shift
so the value will not be the same but the counter should be incrementing. (Jumper
J9 must be configured for the Slave setting.)
? A running counter is sent to the MCP41010 digital potentiometer. The D POT
value should be counting on the LCD.
When pin J2-3 is connected to J5-2 and pin J2-2 is connected to J5-3, “OK” will appear
on the lower right corner of the screen at power-up.
DS70099B-page 40
Advance Information
? 2003 Microchip Technology Inc.
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