XR21B1421 Overview
The XR21B1421 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) bridge to HID class USB interface. The USB interface is fully pliant to the USB 2.0 (Full-Speed) specification with 12 Mbps USB data transfer rate. The USB interface also supports USB suspend, resume and remote wakeup operations.
XR21B1421 Key Features
- ±15kV ESD on USBD+/USBD- USB 2.0 pliant, Full-Speed (12Mbps)
- Unique pre-programmed USB serial number
- Internally generated 48MHz core clock
- Enhanced UART features
- Baud rates up to 12 Mbps
- Fractional Baud Rate Generator
- 512-byte TX and 512-byte RX FIFOs
- Auto Hardware / Software Flow Control
- Multidrop and Half-Duplex Modes
- Auto RS-485 Half-Duplex Control
