https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-SAI-2-data-lines/m-p/1268565#M60409 <P>Hi Argail,</P> <P>There is only one TX_BCLK and one RT_BCLK. If you have two devices and both need RX and TX, they have to share same TX_BCLK and RT_BLCK. Their data is independent.</P> <P>&nbsp;</P> <P>Regards,</P> <P>Jing</P> Tue, 27 Apr 2021 05:59:35 GMT jingpan 2021-04-27T05:59:35Z https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-SAI-2-data-lines/m-p/1267942#M60397 <P>I'm looking for some clarification on how the SAI module works on the K66 MCU.</P><P>There is only one SAI on this device but the datasheet says there is 2 Tx data lines and 2 Rx data lines. Does this means I may connect one GSM module with I2S interface and one monaural I2S audio codec on the same MCU and at the same time?</P><P>Regards</P> Mon, 26 Apr 2021 07:47:10 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-SAI-2-data-lines/m-p/1267942#M60397 Argail 2021-04-26T07:47:10Z https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-SAI-2-data-lines/m-p/1268565#M60409 <P>Hi Argail,</P> <P>There is only one TX_BCLK and one RT_BCLK. If you have two devices and both need RX and TX, they have to share same TX_BCLK and RT_BLCK. Their data is independent.</P> <P>&nbsp;</P> <P>Regards,</P> <P>Jing</P> Tue, 27 Apr 2021 05:59:35 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-SAI-2-data-lines/m-p/1268565#M60409 jingpan 2021-04-27T05:59:35Z