Universal Asynchronous Receiver/Transmitter Core

Features

• Programmable automated RTS and CTS generation
• In automated CTS mode, CTS controls transmitter
• In automated RTS mode, receive FIFO contents and threshold control RTS
• Fully backward compatible with 16450 UARTs
• In the 16450 mode, Hold and Shift registers eliminate the necessity of precise synchronization between the CPU and serial data
• Programmable aud Rate Generator allows division of any input reference clock by 1 to (216 %961) and generates an internal 16x clock
• Standard asynchronous communication bits (Start, Stop, and Parity) added to or deleted from the serial data stream
• Independent receiver clock input
• Fully prioritized interrupt system controls
• Transmit, Receive, Line Status, and Data Set interrupts independently controlled
• Fully programmable serial interface characteristics:
• 5-, 6-, 7-, or 8-Bit Characters
• Even-, Odd-, or No-Parity Bit
• Generation and Detection
• 1-, 1 1/2-, or 2-Stop bit generation
• Baud Generation
• False-start bit detection
• Extensive status reporting capabilities
• Line break generation and detection
• Internal diagnostic capabilities:
• Loopback controls for serial link fault isolation
• Break, Parity, Overrun, and Framing error simulation
• Modem control functions (CTS, RTS, DSR, DTR, RI, and DCD)
• Fully synthesizable RTL Level Verilog core