8-bit Microcontrollersのトピック36 to 13 pin https://community.nxp.com/t5/8-bit-Microcontrollers/36-to-13-pin/m-p/716277#M22483 <HTML><HEAD></HEAD><BODY><P>hello every body. I saw a mini ECU board that had 36 inputs. But only they use 13 pins of a micro controller. every 4 inputs goes to an optocoupler ic, every input has two pin at output, one of them connect to a diode package and the output of diode connect to micro, another connect to same pin in other optocoupler ic and then connect to a micro input pin. how it works?<span class="lia-inline-image-display-wrapper" image-alt="IMG_20180204_223432.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/38279i4C18B2925359B2C4/image-size/large?v=v2&amp;px=999" role="button" title="IMG_20180204_223432.jpg" alt="IMG_20180204_223432.jpg" /></span></P></BODY></HTML> Sun, 04 Feb 2018 19:13:17 GMT hosseings 2018-02-04T19:13:17Z 36 to 13 pin https://community.nxp.com/t5/8-bit-Microcontrollers/36-to-13-pin/m-p/716277#M22483 <HTML><HEAD></HEAD><BODY><P>hello every body. I saw a mini ECU board that had 36 inputs. But only they use 13 pins of a micro controller. every 4 inputs goes to an optocoupler ic, every input has two pin at output, one of them connect to a diode package and the output of diode connect to micro, another connect to same pin in other optocoupler ic and then connect to a micro input pin. how it works?<span class="lia-inline-image-display-wrapper" image-alt="IMG_20180204_223432.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/38279i4C18B2925359B2C4/image-size/large?v=v2&amp;px=999" role="button" title="IMG_20180204_223432.jpg" alt="IMG_20180204_223432.jpg" /></span></P></BODY></HTML> Sun, 04 Feb 2018 19:13:17 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/36-to-13-pin/m-p/716277#M22483 hosseings 2018-02-04T19:13:17Z