https://community.nxp.com/t5/LPC-Microcontrollers/Upgrade-LPC43xx-with-USB/m-p/1306524#M45845 <P>Hi&nbsp;<SPAN>jean-marcrouxel</SPAN></P> <P>No, IAP Re-invoke ISP only supports UART0 pins U0_RX and U0_TX. It doesn't support USB interface. If user needs to update firmware with USB interface during run time, he needs to develop his own secondary bootloader.</P> <P>Have a nice day,</P> <P>Jun Zhang</P> Tue, 13 Jul 2021 04:10:47 GMT ZhangJennie 2021-07-13T04:10:47Z https://community.nxp.com/t5/LPC-Microcontrollers/Upgrade-LPC43xx-with-USB/m-p/1306206#M45840 <P>Hello</P><P>I would like to upgrade my LPC4337 with USB-bus (USB1).</P><P>My question is : is it possible to use "IAP Re-invoke ISP()" to enter downloading mode with USB1 and not only UART0 ?</P><P>Is yes, how can I do that ?</P><P>Regards</P><P>&nbsp;</P> Mon, 12 Jul 2021 13:18:12 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Upgrade-LPC43xx-with-USB/m-p/1306206#M45840 jean-marcrouxel 2021-07-12T13:18:12Z https://community.nxp.com/t5/LPC-Microcontrollers/Upgrade-LPC43xx-with-USB/m-p/1306524#M45845 <P>Hi&nbsp;<SPAN>jean-marcrouxel</SPAN></P> <P>No, IAP Re-invoke ISP only supports UART0 pins U0_RX and U0_TX. It doesn't support USB interface. If user needs to update firmware with USB interface during run time, he needs to develop his own secondary bootloader.</P> <P>Have a nice day,</P> <P>Jun Zhang</P> Tue, 13 Jul 2021 04:10:47 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Upgrade-LPC43xx-with-USB/m-p/1306524#M45845 ZhangJennie 2021-07-13T04:10:47Z