SPRUJ53D April 2024 – April 2026 TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SG-Q1 , TMS320F28P559SJ-Q1
The USB module on this device has an internal physical layer transceiver (PHY). The I/O signals are not normal digital signals, and as a result, the signals do not connect to the pins through the normal GPIO mux path. Instead, a special analog mux is used. To connect the USB signals to the device pins, set the GPyAMSEL bits appropriately. See the data sheet for which GPIOs are associated with the USB signals USBDM and USBDP. See Section 10.13 for correct GPyAMSEL register bits to set. Do not enable pullups or any other special pin option when using the USB signals.