SPRUIJ9C April 2018 – October 2025
Whenever the EVM power supplies are cycled, the USB connection supporting the UART console and XDS100 emulation also drops. Since this port takes time to enumerate after power is restored, initial console output can be lost. Also, this results in power leakage from the USB VBUS back into the EVM when it is not powered. Please refer to the AM571 IDK EVM design (v1.3 or later) for an example of the required circuitry that will allow the USB bridge to remain properly powered and isolated from the EVM to prevent these negative affects.