topic Re: What's the difference between SIENF and IENF in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/What-s-the-difference-between-SIENF-and-IENF/m-p/884984#M35451 <HTML><HEAD></HEAD><BODY><P>Have a look in the Users Manual:</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/78368iBEB8B90931E1987F/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P></P><P>Using IENF you can both set and reset the enable interrupt (writing 0 or 1) in the SIENF you can only enable the interrupt (writing 1), writing a 0 to one of the bits in SIENF has no effect (so you can't&nbsp;by mistake, disable any interrupts that are enabled somewhere else, by setting its bit to 0 in SIENF)</P></BODY></HTML> Sat, 23 Feb 2019 10:10:22 GMT carstengroen 2019-02-23T10:10:22Z What's the difference between SIENF and IENF https://community.nxp.com/t5/LPC-Microcontrollers/What-s-the-difference-between-SIENF-and-IENF/m-p/884983#M35450 <HTML><HEAD></HEAD><BODY><P>I have a GPIO interrupt working on an LCP11Uxx. There are two registers SIENF and IENF that seem to do the same thing. They both set a bit in IENF. The datasheet says writing to IENF sets an interrupt, and writing to SIENF just writes to IENF. I tested it in the debugger, and it's true.<BR /><BR />If I can write directly to IENF, what is the purpose of SIENF?</P></BODY></HTML> Fri, 22 Feb 2019 19:58:44 GMT https://community.nxp.com/t5/LPC-Microcontrollers/What-s-the-difference-between-SIENF-and-IENF/m-p/884983#M35450 lydiaj5000 2019-02-22T19:58:44Z Re: What's the difference between SIENF and IENF https://community.nxp.com/t5/LPC-Microcontrollers/What-s-the-difference-between-SIENF-and-IENF/m-p/884984#M35451 <HTML><HEAD></HEAD><BODY><P>Have a look in the Users Manual:</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/78368iBEB8B90931E1987F/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P></P><P>Using IENF you can both set and reset the enable interrupt (writing 0 or 1) in the SIENF you can only enable the interrupt (writing 1), writing a 0 to one of the bits in SIENF has no effect (so you can't&nbsp;by mistake, disable any interrupts that are enabled somewhere else, by setting its bit to 0 in SIENF)</P></BODY></HTML> Sat, 23 Feb 2019 10:10:22 GMT https://community.nxp.com/t5/LPC-Microcontrollers/What-s-the-difference-between-SIENF-and-IENF/m-p/884984#M35451 carstengroen 2019-02-23T10:10:22Z