USB to UART Bridge IC

Operating Voltage (VDD): 3.3V~5.5V

• UART pin Voltage (VDDIO): 1.8V~VDD (Less than VDD voltage)

• Power down and wake-up functions to reduce power consumption

• Fully integrated 12MHz oscillator with 0.25% accuracy for all USB modes which requires no external components

• USB interface

♦USB 2.0 Full Speed compatible

♦Implements USB protocol composite device:–Communication Device Class (CDC) for communications and configuration–Human Interface Device (HID) for user configure USB VID, PID and device description strings

♦Internal 1.5kΩ pull-high resistor on D+ pin

• Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART

♦Supports Baud Rate up to 3Mbps

♦Supports maximum 128 bytes transmit buffer and 128 bytes receive buffer

♦UART Data formats supported:–Data bits: 8–Stop bits: 1 and 2–Parity: odd, even, no parity

♦Supports RTS/CTS pins for auto flow control

♦Supports RX pin resume signal to request a remote wake-up

♦Supports automatic resynchronization function