![]() ![]() The classical serial asynchronous data communications format illustrated in Figure 1 provides the necessary synchronization without a clock signal. In this mode of transmission, there is no separate clock signal. The most frequently encountered serial communication modes are based on asynchronous data transmission. Through these three examples, different aspects of serial port operation will be discussed. ![]() Examples illustrating the use of dual serial ports and 11-bit address recognition capability will also be presented. A general overview of the port's operation will be provided and a detailed software example will be presented. In this application note, this configuration will be described in detail. This application note describes the setup and operation of the most commonly encountered operating modes of this interface.īecause of its universal applicability, the most frequently used configuration of the High-Speed Micro's serial channel is its 10-bit asynchronous mode. The parallel data side of the device interfaces with the processor's internal data bus, and the serial side interfaces with the outside world. As the name implies, a USART converts parallel data to and from a synchronous or asynchronous serial bit stream. They are based on a Universal Synchronous/Asynchronous Receiver/Transmitter (USART) implementation. The High-Speed Microcontroller's serial interfaces are functionally identical to those found on other lower performance 8051 processors. Code examples are used to highlight the use of timers used as baud rate generators. The application note discusses baud clock sources, polling and interrupt modes, baud rate generation, asynchronous 10-bit operations and dual serial port operations. This application note introduces the user to the universal synchronous/asynchronous receiver/transmitter, or USART, as used in microcontrollers. The Analog DS80C320 and other high-speed microcontrollers has two identical serial ports. ![]()
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