Kinetis Microcontrollers中的主题 UART and pin mux https://community.nxp.com/t5/Kinetis-Microcontrollers/UART-and-pin-mux/m-p/874445#M52028 <HTML><HEAD></HEAD><BODY><P>A UART consists of four pins TX, RX, CTS_b, and RTS_b.</P><P></P><P>Is it required that all pins of a UART be on the same port, or can any combination of pins be used?</P></BODY></HTML> Wed, 20 Mar 2019 22:01:44 GMT Keith4DSmith 2019-03-20T22:01:44Z UART and pin mux https://community.nxp.com/t5/Kinetis-Microcontrollers/UART-and-pin-mux/m-p/874445#M52028 <HTML><HEAD></HEAD><BODY><P>A UART consists of four pins TX, RX, CTS_b, and RTS_b.</P><P></P><P>Is it required that all pins of a UART be on the same port, or can any combination of pins be used?</P></BODY></HTML> Wed, 20 Mar 2019 22:01:44 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/UART-and-pin-mux/m-p/874445#M52028 Keith4DSmith 2019-03-20T22:01:44Z Re: UART and pin mux https://community.nxp.com/t5/Kinetis-Microcontrollers/UART-and-pin-mux/m-p/874446#M52029 <HTML><HEAD></HEAD><BODY><P>Keith</P><P></P><P>You can use any pins belonging to a UART. Eg. UART1_TX on PTB5 or PTE11, UART1_RX on PTB6, PTE12 or PTA17, UART1_RTS on PTB7 or PTE13 and UART1_CTS on PTB14 or PTA22 or PTD2 (ports examples illustrative and probably done match a physical device).</P><P></P><P>What you can't do is use UART1_CTS and UART1_RTS with UART2_TX and UART2_RX (at least not in one of the automated modem modes).</P><P></P><P>Not all RTS and CTS pins are necessarily available (some UARTs or LPUARTs done have or support them) and RTS/CTS operation (RTS/CTS flow control and RS485 control) can usually be emulated with GPIOs in such cases if absolutely necessary.</P><P></P><P>Regards</P><P></P><P>Mark</P></BODY></HTML> Wed, 20 Mar 2019 23:41:14 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/UART-and-pin-mux/m-p/874446#M52029 mjbcswitzerland 2019-03-20T23:41:14Z