When SystemFrequency="600MHz", we want the sampling rate to support 768kHz

[Liu0345]

I use the XU316-1024-QF60B chip and want the sample rate to support 768kHz.

When SystemFrequency="600MHz", the I2S signal output of XU316-1024-QF60B is unstable, the external DAC(ESS9038Q2M) is connected, and the sampling rate is 768kHz. The sine wave signal output by the DAC is intermittent (I can confirm that the DAC's 768kHz configuration is correct, useful sw usb audio-v6.15.2 playback test)

Set the SystemFrequency of the XN file to "800MHz", and the I2S signal will be normal; Whether the new sw usb audio 8.1.0 can not handle the overall running speed, what can be done to improve the execution speed;

Or change what process, when SystemFrequency="600MHz", to support 768kHz, so that the I2S signal is normal.

This issue should probably be summed up in the lib xua issue

[xross]

768kHz isn't a tested feature of the design. Marking as enhancement