A/D conversion on PIC 16F877A with MikroC

by Sohaib
(U.A.E)

PIC 16F877A A/D Conversion and MikroC

I'm quite new to the whole PIC scene(about a month).I am using the PIC for for A/D conversion a and subsequent serial transmission to a transceiver for a wireless comm. project.I have some questions regarding the compiler i'm using.I'm using the MikroC v7 compiler which i downloaded from the the MikroC website.In that they say that the function Adc_Read() automatically derives the A/D conversion clock from the A/D module's internal oscillator on the PIC.My questions are:

What is the frequency of this internal A/D oscillator?I read the datasheets (for the 16F877a) but i couldn't get any information on this.

If don't wish to use the internal RC oscillator as mentioned above but i want to use any of the other options for conversion(as mentioned in the data sheet),If i make the necessary configurations (for using the another clock other than the RC)Will i not be able to use the Adc_read() for A/D conversion?

What are the differences between the free download and the paid version of MikroC?