PICDEM TM Lab Development Board User’s Guide
Since this lab outputs the 4 Most Significant bits of the ADC result and V DD is used as
the reference voltage, the LED display should correspond with the following voltage
levels shown in Table 5-1.
TABLE 5-1:
CORRESPONDING VOLTAGE ON PIN 13 RELATED TO LIT LEDS
( 1 = LED ON, 0 = LED OFF)
LED4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
LED3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
LED2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LED1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
pin 13 Voltage
< 0.3125V
> 0.3125V
> 0.625V
> 0.9375V
> 1.25V
> 1.5625V
> 1.875V
> 2.1875V
> 2.5V
> 2.8125V
> 3.125V
> 3.4375V
> 3.75V
> 4.0625V
> 4.375V
> 4.6875V or greater
Note:
The greater than symbol (>) is required since the lower 6 bits of the ADC
result are not shown using LEDs.
The solution for this project is located in the
C:\PICDEM_Lab\ADC_Labs\ADC_Lab1\solution directory.
DS41369A-page 84
? 2009 Microchip Technology Inc.
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