Is this Robostix's ADC capable of reading negative voltages?

Question

So I have a robostix carrying a gumstix, but a voltage signal is coming into the ADC (Analog to Digital Converter) with values ranging between +/- 5V. Following is a port layout of the robostix:

http://docwiki.gumstix.org/index.php/Robostix_I/O_pins#Pulse_Width_Modulation_.28PWM.29

My question is:

Is this robostix able to differentiate between a negative and positive voltage source? If so how is it calibrated to later be read?

Answer 1

Join this club. they specialize in nothing but the AVR processor in that board. they can tell you every thing you need to know about that proccessor and its ADC ports.

http://www.avrfreaks.net/