K10. Uart rx-Irq stopped at baud-s higher then 230400

[tty]

When I communicate at second uart with high speed (460800 and 921600) between two kinetis K10 I see RX-IRQ stopped after some time-lapse.  On other speeds all works well.

1) I'm using the kuart MQX driver (3.8) in interrupt mode and I configured it for this speed.

2) I'm using a 40MHz crystal and 40MHz  sys bus.

What is this might be?

Thanks a lot.

[Xlerb]

Hi tty,

May not be the source of your problem but the K10 is only supposed to work with crystals up to 32MHz.

Cheers,

Martin.