# Serial ports in DMA mode with baud rate \< 115200

**URL:** <https://forums.digi.com/t/serial-ports-in-dma-mode-with-baud-rate-115200/4495>\
**Category:** NET+OS\
**Created:** [November 8, 2004, 11:30am UTC](https://forums.digi.com/t/serial-ports-in-dma-mode-with-baud-rate-115200/4495 "2004-11-08T11:30:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cassius1](https://avatars.discourse-cdn.com/v4/letter/c/e36b37/32.png) [@cassius1](https://forums.digi.com/u/cassius1)\
**Post date:** [November 8, 2004, 11:30am UTC](https://forums.digi.com/t/serial-ports-in-dma-mode-with-baud-rate-115200/4495/1 "2004-11-08T11:30:01Z")

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Hello,I want an application that uses on serial port in DMA mode, reaching 1Mbaud/s, but I need the other port operating below 115200 bauds. Chapter 3 of “NET+OS BSP Software Reference Guide” states that both ports must be used or not in DMA Operation. Consequently, Both of serial port must operate in this mode. It’s possible to operate below 115200 with DMA? Someone already tried with success? Thanks,