MIKROE-11 mikroElektronika, MIKROE-11 Datasheet - Page 27

• Manufacturer Part Number: MIKROE-11
• Description: Development Boards & Kits - AVR BIGAVR2 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-11

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: ATMEGA128
• Core: AVR8
• Interface Type: IDC10, JTAG, RS-232, USB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 bit
• For Use With: ATmega, AT90

A/D CONVERTER TEST INPUTS
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The BIGAVR2 development board has two potentiometers for demonstrating the operation of
analog-to-digital converter (ADC). Both potentiometers outputs are in the range of 0 - 5V.
These analog signals can be connected to two different analog input pins at the same thime.
Jumper group J18 enables connection between potentiometer P1 and one of the following
pins: PF0, PF1, PF2, PF3 or PF4. Jumper group J19 enables connection between potentiome-
ter P2 and one of the following pins: PF1, PF2, PF3, PF4 or PF5.
Figure 34
A/D converter inputs
In order to measure analog signal without interference, it is necessary to turn off the corre-
sponding switch of the SW4. This disables connection between PORTF pins and pull-
up/down resistors.
A/D converter has a wide range of applications. The microcontroller takes analog signal from
its input pin and converts it into digital value. Basically, it is possible to measure any analog
signal that fits in the range acceptable by the microcontroller. In case of AVR, that range is 0 - 5V.