https://community.nxp.com/t5/High-Performance-Analog-Front/IRQ-on-SC16IS740/m-p/2053279#M12 <P>Hello,&nbsp;</P> <P>To clear the interrupt and deactivate the IRQ pin, it is necessary to read the IIR, which also clears the specific interrupt.</P> Thu, 27 Feb 2025 20:17:44 GMT ErikaC 2025-02-27T20:17:44Z https://community.nxp.com/t5/High-Performance-Analog-Front/IRQ-on-SC16IS740/m-p/2053007#M11 <P>I can't find this in the datasheet. . .</P><P>What clears the IRQ pin on the 16S740?<BR />If I am sending the last of a sequence of characters (FIFO disabled) how should I respond to the "Transmit register empty" interrupt?</P> Thu, 27 Feb 2025 13:57:08 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/IRQ-on-SC16IS740/m-p/2053007#M11 BENTON 2025-02-27T13:57:08Z https://community.nxp.com/t5/High-Performance-Analog-Front/IRQ-on-SC16IS740/m-p/2053279#M12 <P>Hello,&nbsp;</P> <P>To clear the interrupt and deactivate the IRQ pin, it is necessary to read the IIR, which also clears the specific interrupt.</P> Thu, 27 Feb 2025 20:17:44 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/IRQ-on-SC16IS740/m-p/2053279#M12 ErikaC 2025-02-27T20:17:44Z