res06b0003_h8300lslp| Application Note
APPLICATION NOTE
H8/300L SLP Series
Auto Baud Rate Detection (AutoBaud)
Introduction
This application note describes the software implementation of baud rate detection of incoming data. The SLP MCU is used to demonstrate the detection of 1200, 4800, 9600, and 19200 bps. This automatic detection is useful for establishing communication link between two devices. The slave device will be able to detect the baud rate of master controller and adjust accordingly. This protocol can be implemented on any MCU that carries an asynchronous serial port with a baud rate generator. In this application note, the protocol is demonstrated using the ALE300L emulator (the SLP MCU H8/38024) connected to the general application board. The SLP MCU is emulating as a slave device, whereas the PC (using the built-in HyperTerminal) acts as the master controller.
Target Device
H8/38024
Contents
1. 2. 3. Theory ............................................................................................................................................... 2 Operation .......................................................................................................................................... 7 Code Listing ...................................................................................................................................... 9
RES06B0003-0100/Rev.1.00
September 2004
Page 1 of 15
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