MPC5xxxのトピックRe: MPC5775K FlexCAN Loopback module https://community.nxp.com/t5/MPC5xxx/MPC5775K-FlexCAN-Loopback-module/m-p/674643#M7902 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>You need not change the state of pins. The loopback mode is used for internal test, for example testing of receive/masking operation. FlexCAN behaves as it normally does when transmitting and treats its own transmitted message as a message received from a remote node. The ACK field is ignored so the message can be received normally.</P><P>In the loopback mode no message is visible on TX output, it goes to the recessive state (logic “1”).</P><P></P><P>BR, Petr</P></BODY></HTML> Tue, 06 Jun 2017 06:17:22 GMT PetrS 2017-06-06T06:17:22Z MPC5775K FlexCAN Loopback module https://community.nxp.com/t5/MPC5xxx/MPC5775K-FlexCAN-Loopback-module/m-p/674642#M7901 <HTML><HEAD></HEAD><BODY><P>Dear all:</P><P>&nbsp; &nbsp; I'm using MPC5775K to test FlexCAN module now,but I have a lot of questions in the loopback mode,the datasheet said that&nbsp;The Rx CAN input pin is ignored and the Tx CAN output goes to the recessive state (logic '1'),does it means that after I transmit &nbsp;a frame of data ,I should change the state of&nbsp;<SPAN>Tx from output to input? Thank you!!!</SPAN></P></BODY></HTML> Mon, 05 Jun 2017 09:59:51 GMT https://community.nxp.com/t5/MPC5xxx/MPC5775K-FlexCAN-Loopback-module/m-p/674642#M7901 lihongrun 2017-06-05T09:59:51Z Re: MPC5775K FlexCAN Loopback module https://community.nxp.com/t5/MPC5xxx/MPC5775K-FlexCAN-Loopback-module/m-p/674643#M7902 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>You need not change the state of pins. The loopback mode is used for internal test, for example testing of receive/masking operation. FlexCAN behaves as it normally does when transmitting and treats its own transmitted message as a message received from a remote node. The ACK field is ignored so the message can be received normally.</P><P>In the loopback mode no message is visible on TX output, it goes to the recessive state (logic “1”).</P><P></P><P>BR, Petr</P></BODY></HTML> Tue, 06 Jun 2017 06:17:22 GMT https://community.nxp.com/t5/MPC5xxx/MPC5775K-FlexCAN-Loopback-module/m-p/674643#M7902 PetrS 2017-06-06T06:17:22Z