Cypress provides a recommended PCB layout in the application note AN2720SC-01 PCB Layout Guidelines. It's essential to follow these guidelines to ensure optimal performance, minimize noise, and reduce EMI.
The AN2720SC-01 is a USB 2.0 high-speed transceiver, but it can also operate at full-speed (12 Mbps) and low-speed (1.5 Mbps) modes. To configure for different speeds, you need to set the appropriate values for the SPEED pin and the USB_CFG register. Refer to the datasheet and application notes for specific configuration details.
The AN2720SC-01 supports cable lengths up to 3 meters (10 feet) for high-speed mode and up to 5 meters (16.4 feet) for full-speed mode, as per the USB 2.0 specification. However, the actual cable length may vary depending on the specific application, cable quality, and environmental conditions.
The AN2720SC-01 requires a 3.3V power supply, and it's recommended to use a low-dropout regulator (LDO) to ensure a stable voltage supply. You should also implement power management techniques, such as power gating and dynamic voltage scaling, to reduce power consumption and heat generation.
The AN2720SC-01 has built-in ESD protection diodes on the USB pins, which can withstand up to ±8 kV of ESD voltage. To prevent latch-up, ensure that the device is powered up and down correctly, and avoid applying voltage to the I/O pins before powering up the device.
AN2720SC-01 datasheet
by Cypress Semiconductor
