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About SDMA support for UART in i.MX6DQ.

Question asked by Keita Nagashima on Jan 28, 2015
Latest reply on Jan 28, 2015 by Keita Nagashima

Dear Sir or Madam,

 

Hello.

Refer to "46.1 Introduction" in i.MX 6 Linux Reference Manual, Rev. L3.10.17_1.0.0-ga, 05/2014

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If you want to use the DMA support for UART please also

enable the RTS/CTS for it. The DMA may be abnormal if you

do not enable the RTS/CTS.

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I'd like to know the why FSL judged that RTS/CTS need.

(My customer will use SDMA with UART that do not enable the RTS/CTS.)

What problem did freescale face in the past?

 

Best Regards,

Keita

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