In earlier slides, it was shown that the synchronous serial interface provides a clock with the data and how an asynchronous interface receives the data on a pin and then synchronizes an internal clock to be able to accurately receive the data. It is asynchronous because the receiving device has no knowledge of the clock tolerance or jitter of the source port. The baud rate is the bit rate of the link in bits/second. Some common rates for UART communications are 19,200 baud, 57,600 baud or 115,200 baud. When the receiver starts receiving the data, it will synchronize its baud clock such that the edges align with the rate of the incoming data stream. In doing so, it then latches the bits and converts them to the parallel value required by the CPU.