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Baud rate granularity in single clock microcontrollers for serial port transmissions
Baud rate granularity in single clock microcontrollers for serial port transmissions
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机译:单时钟微控制器中用于串行端口传输的波特率粒度
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摘要
A microcontroller provides an asynchronous serial port with a serial clock derived from the processor clock. Although the serial clock cannot be exactly programmed to yield an ideal frame length at a particular baud rate, an additional register is provided for tuning the frame length. Each transmitted asynchronous serial frame is stretched by a number of either serial clock phases or processor clocks defined in the tuning register. This provides for improved reception of the asynchronous data, because the frame length more nearly matches the ideal baud rate frame length.
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