USBhardwareandPCBguidelinesusingSTM32MCUs-AN方案.PDFVIP

AN4879 Application note USB hardware and PCB guidelines using STM32 MCUs Introduction The STM32 MCU family includes a group of products embedding a USB (Universal Serial Bus) controller and a PHY (physical layer of the open systems interconnection model); the list of applicable products is detailed in Table 1. The USB controller and the PHY features enable the support of full speed (FS) USB 2.0 with a data rate of 12 Mbit/s. This application note provides guidelines for PCB (printed circuit board) design to help ensure electrical compliance with the USB standards. Some high performance STM32 MCUs propose also a ULPI (USB 2.0 transceiver macro cell interface and low-pin interface), which allows to have a USB 2.0 with high-speed data compatibility by connecting an external ULPI HS PHY. Refer to Table 4 for the list of STM32 devices featuring the ULPI capability. This application note also covers details about this configuration. Table 1. Applicable products Type Part numbers, product lines and product series STM32F2 Series, STM32L1 Series, STM32F0x2, STM32F102, STM32F103, STM32F105/107, STM32F302, STM32F303, STM32F373, STM32F401, STM32F405/415, STM32F407/417, STM32F411, STM32F412, STM32F427/437, STM32F429/439, STM32F446, STM32F469/479, STM32F7x5, STM32F7x6, STM32F7x7, STM32F7x8, Microcontrollers STM32F7x9,