nRF52 clock output

[siva]

I need a clock output (> 12MHz) from nRF52 for interfacing a sensor.

From the below post, looks like Max possible output is 8MHz since peripheral clock is limited to 16MHz.

devzone.nordicsemi.com/.../

Can I enable ETM and get 16MHz from TRACECLK (pin 20)? I will not use TRACEDATA[] and ensure that those pins are left open.

Is there any alternative method for my requirement?

Thanks.

[Øyvind Karlsen]

Hi,

You can use the clock pin from the I2S module to output 16 MHz onto a pin, this is out of specification and can/will impact your signal. As the specification states, the I2S module has been verified up to 4 MHz output.

For the best result, use a separate crystal for the external device.

Best regards,

Øyvind