APPLICATION NOTE 603

Implementing a Serial Port FIFO Using Dual Data Pointers

By: Kevin Self

Abstract: The Dallas Semiconductor high-speed microcontroller family allows the system designer to optimize serial communications via the internal UART. This application note demonstrates the use of a circular buffer utilizing the dual data pointer found in these enhanced 8051 microcontrollers. Example assembly code is provided to show the implementation of a simple 256-byte serial port circular buffer.