CC2340R5: Capp Array value

Divyani Rathod

Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Controller: CC2340R5Q1(32 pins)

Kindly suggest "HFXT Cap Array Q1" Value and "HFXT Cap Array Q2 Value"(What should i mention this value). Kindly also help us for the calculation.

8 months ago

+1 Haiatullah Gholami 8 months ago

TI__Expert 3630 points

Hi Divyani,

I cannot give a value for HFXT Cap Array as it will be different for different designs, but I can tell you how you can determine this value yourself.

You can use SmartRF Studio 8 to set the device to send an unmodulated carrier wave and then you can measure the frequency offset. After that, you can change the Cap Array values until the frequency offset is at around 0 ppm.

Regards,

0 Divyani Rathod 8 months ago in reply to Haiatullah Gholami

Prodigy 250 points

Can you at least tell me how we can use only internal osc. Like in cc26x2 we use value -43 to use only internal

0 Haiatullah Gholami 8 months ago in reply to Divyani Rathod

TI__Expert 3630 points

Hi Divyani,

Are you rereferring to the 32kHz osc?

This can be enabled in Sysconfig in TI DEVICES section under Device Configuration by choosing LF RCOSC as the Low Frequency Clock Source.

You should be aware that if you are using the LF OSC as the 32kHz clock source, the device can only be configured in certain roles. For more information on this, please see section CLK_01 in https://www.ti.com/lit/er/swrz136a/swrz136a.pdf.

Regards,

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CC2340R5: Capp Array value