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CHAPTER 9 ASYNCHRONOUS SERIAL INTERFACE
The
µ
PD78214 contains an asynchronous serial interface, UART (Universal Asynchronous Receiver Transmitter).
This interface transmits 1-byte data following a start bit and is capable of full-duplex transmission.
The
µ
PD78214 also contains a baud rate generator for UART, which allows data to be transmitted at a wide baud
rate range.
In addition, a baud rate can also be specified by dividing the frequency of the clock input to the ASCK pin.
Moreover, 8-bit timer/counter 3 can be used to generate a baud rate.
When the baud rate generator for UART is used, the MIDI standard baud rate (31.25 kbps) can also be obtained.
The asynchronous serial interface operates independently of the clock-synchronized serial interface.
9.1 CONFIGURATION
This section describes the configuration of the asynchronous serial interface.
See Section 9.4 for details of the baud rate generator.