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AM3517 UART4 RX cannot read more than 64 bytes at a time

Other Parts Discussed in Thread: AM3517

Dear Sir / Mis,

I enabled UART4 on my AM3517, however I encountered an issue. When I write more than 64 bytes in a burst(which is the exact size of the FIFO) I receive an OVERRUN error, it seems like the DMA doesn't clear the FIFO as fast as it should.

I tried the same on UART1 and it worked perfectly. On the TX of UART4 there is no problem with larger than 64 byte bursts, also when I use less than 64 bytes on UART4 it works great.


Can anyone help me?

Thank you,

Shahal