nRF51 or nRF52 i2s Maximum frequency support

[Rajneesh]

Hello Nordic team,

What is the Maximum sampling frequency for i2s we can configure to nRf51 or nRF52 DK?

And if we enable UART module to print live of i2s on serial console then what sample rate we achieve?

Thanks

[haakonsh]

Hey Rajneesh,

The nRF51 series does not have a I2S peripheral. 

The maximum LRCLK is 48kHz. 

Both the I2S and the UARTE has EasyDMA which means that they can operate without invoking the CPU, this greatly increases that probability that you can achieve 48KHz with UART.

I need to know some specs for the I2S and BLE activity:

1. Are you planning to use BLE concurrently with I2S? 
2. Mono or stereo?
3. Bitwidth?
4. Master or slave?

Cheers,

Håkon.