Asynchronous interface serial

Besides the data rate for the pulses traveling between devices, the devices need to have in common:. This might be a good time to point out that a transceiver XCVR is a device that combines the ability to both transmit and receive.

The rate at which a serial communication takes place is called a baud rate. Baud rates are measured in bits per second bps and some standard baud rates are , , , , , , , , , , , , , , , , , , , and bps. For simple communication, such as communicating with a microcontroller to program it from a host PC, the baud rate is usually bps or so. In TTL series communication, a low voltage level means a 0-bit value and a high voltage level means a 1-bit value.

Some other facts of note are that serial ports See Figure 1 can only communicate with one device at a time, which means that typically there is one device at each end of a serial cable and no more. If your microcontroller is communicating serially with another device, both the microcontroller and the other device can only see what the other is sending. This is by far one of the best descriptions of TTL and serial communications in general.

Share Email. Top clipped slide. Download Now Download Download to read offline. Asynchronous Serial Communication and standards Apr. Mathivanan Natarajan Follow. Serial data transfer. Digital communication systems. Synchronous and asynchronous 1. Serial Communication. Synchronous and-asynchronous-data-transfer.

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