RTOS/CC2640R2F: Using internal 48Mhz RC Oscillator

sagar c

Intellectual 270 points

Part Number: CC2640R2F

Tool/software: TI-RTOS

Hello,

How can i set Clock source as internal 48Mhz RC Oscillator clock for running BLE.

I only have following setting for HF clock in my configuration file.

//#####################################
// Special HF clock source setting
//#####################################
#ifndef SET_CCFG_MODE_CONF_XOSC_FREQ
// #define SET_CCFG_MODE_CONF_XOSC_FREQ                 0x1        // Use HPOSC as HF source (if executing on a HPOSC chip, otherwise using default (=0x3))
// #define SET_CCFG_MODE_CONF_XOSC_FREQ                 0x2        // HF source is a 48 MHz xtal
#define SET_CCFG_MODE_CONF_XOSC_FREQ                    0x3        // HF source is a 24 MHz xtal (default)
#endif

Thanks

Sagar

over 9 years ago

0 Fredrik K over 9 years ago

TI__Guru** 106705 points

Hi Sagar,

You cannot run the radio on the internal 48 MHz RC oscillator.

Cheers,
Fredrik

0 YSR1991 over 9 years ago in reply to Fredrik K

Intellectual 420 points

Hello Fredrik,

In technical reference manual, 6.5 Clock Management section, block diagram shows HF RC OSCillator can be used for deriving system clocks.
or system clocks mentioned doesnt include clock for radio?

Regards,
Sharad

0 JXS over 9 years ago in reply to YSR1991

TI__Guru** 105180 points

Hello Sharad,

That is correct. The RF Core requires the 24 MHz xosc clock source for precision when performing radio operations. The internal 48 MHz RCOSC is used for the MCU system clock when the radio is not active.

Best wishes

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RTOS/CC2640R2F: Using internal 48Mhz RC Oscillator