What is the practical data rate of the asynchronous serial interface (ASI) after accounting for synchronization bytes?

The practical data rate of the asynchronous serial interface (ASI) after accounting for synchronization bytes is often derived from the rules governing the transmission of data in serial communication. While the raw data rate might imply higher throughput, it is essential to consider factors such as start and stop bits, as well as synchronization overhead.

In traditional serial communication, synchronization is crucial for accurate data transmission. The inclusion of synchronization bytes can effectively reduce the number of usable bits in each frame since these bytes do not contribute to the actual data being transmitted. Thus, while the theoretical maximum rate might suggest a higher number, the practical rate reflects the effective data payload capable of being transmitted after accounting for those overheads.

For ASI, the typical practical data rate can be close to 214 megabits per second (Mbps) when these considerations are factored in. This rate considers the loss of capacity due to the addition of synchronization bytes within the data stream. Thus, the correct choice highlights the adjusted rate that includes these real-world communication constraints, providing a more accurate representation of what can be achieved during data transfer.