how to get more memory location?

[meera83]

i m using PIC16F877.
i had been ask to use potentiometer as analog input(0-5V) for PIC and display a range value(00.00-10.00) on LCD..

may i know that is it for one analog signal input to PIC, there are only 256 location to store the convert result?
since every port consist of 8 bits(mean 2^8)..
10/256=0.04 mean that every location store differential value for 0.04?

if i want to hv differential value less than 0.04, mean that i need to have memory location more than 256 place,then what should i do?
for example, if i hv 500memory location, then one location will be 10/500=0.02 which is more precise..

may i know what method can i use in order to get more memory location for store more data?

is it by using external memory EEPROM??

thanks..

 

[engg_pathy]

The adc converson is 8 bit that means 0.04v you can change the adc refference volatge it get more range, that means 0.01v.