Inicore Inc.

UARTmodule

Universal Asynchronous Receiver/Transmitter Module

The UARTmodule is part of Inicore's IPmodule family. Universal asynchronous receiver and transmitter, using the RS232 protocol, are often used to connect peripheral devices to a central controller.

The UARTmodule has one receive and one transmit channel, receive and transmit buffers, an interrupt controller as well as a local bus interface. The built-in receive buffer is configurable in depth, therefore, enabling a gate count and application optimized implementation.

The baudrate generator uses a innovative digital controlled oscillator (DCO) to generate baudrates over a wide frequency range. With a system clock of 8MHz, all baudrates from 1200 baud to 115.2 kbaud have an accuracy of better than 0.1%!

To improve glitch rejection, the receiver uses a 3-point input sampling. Format and parity errors are detected and reported.

Block Diagram

Features

• Single channel UART
• Flexible baudrate generator
• Status and error registers
• Scalable RxFIFO (2/4/8/16 bytes deep)
• Double buffered TxFIFO
• 7-bit or 8-bit format
• 1 or 2 stopbits
• Parity enable, even or odd
• Receive timeout counter
• Local loop back mode
• Local interrupt controller
• Industry standard AMBA APB host interface
• Full synchronous design
• Technology independent, vendor independent

Implementation Features

• Supports register and SRAM based FIFO implementations.
• The Rx-FIFO size is selectable enabling the optimal device utilization
• Fully synchronous design: one clock, one global asynchronous reset.
• Technology independent implementation. This design can be used for any technology as long as timing constraints are met.