PIC18f46k22 ADC issue

[Hayee]

Hi
I am using pic18f46k22 and using ADC module of it. Was reading the registers required for setup and stuck on one register.
ADCON1 bit 7 says its TRIGSEL bit

TRIGSEL: Special Trigger Select bit
1 = Selects the special trigger from CTMU
0 = Selects the special trigger from CCP5

is it necessary to select any of these to trigger the ADC conversion.
What If I don't want to use Special Trigger?

Thanks

 

[FvM]

ADC is started by setting the GO bit.
Review user manual:
17.2.1 STARTING A CONVERSION
17.2.8 SPECIAL EVENT TRIGGER