RTOS/CC1310: external Crystal software setting issue

My project settings are already set to 0x02.

I have some questions here.

I have not modified the clock settings.

0x2 is the setting for using external clock. Why is 0x2 the default setting?

If I set it to 0x2, am I using two external clocks?

and I do not know the meaning of this setting.

What is the difference between the "External LF clock" and the "LF XOSC"?

Does XOSC mean external crystal and RCOSC mean internal crystal?

Thanks 

Hi Kim,

I would expect LF XOSC (0x2) to be the default value as the development platforms we provide all use an external 32.768 kHz crystal. 0x2 does not mean you use two external crystal, it means you will be using the LF XOSC.

The difference between "External LF clock" and "LF XOSC" is that one is an external clock signal source and the other is a crystal source (think oscillator vs crystal). XOSC does indeed mean external crystal, RCOSC is the internal RC-oscillator (not a crystal).

To set "LF clock derived from High Frequency XOSC" and "External LF clock", is it necessary to configure the clock source as hardware and set define?

The documentation says that rf uses 24MHz external crystal 

     ( documnet  : A 24-MHz external crystal is required as the frequency reference for the radio. This signal is doubled  internally to create a 48-MHz clock. )

Will RF use 32.768-kHz external crystal? or use 24-MHz external crystal?

I understand that I use external crystals.

but I was wondering about the settings of 0x0 and 0x1, so I asked additional questions.

(How to set s/w and h/w settings for 0x0 and 0x1)