Pular para o conteúdo principal
Knowledgebase
Home
Renesas Brasil - Knowledgebase

Overrun

Latest Updated:02/01/2006

Question:

Overrun

Answer:

When data is being transferred, if the transmitting side sends data at a rate faster than the receiving side's processing speed, the receiving side cannot correctly receive that data. This state is known as an overrun.
For example, when using UART for serial communication, the data is sent serially one bit at a time, stored in the shift register, converted to parallel data and transferred to the buffer register once the required bits have been received. At this time, if the next data is converted to parallel data and transferred to the buffer register before the previous data has been read from the buffer register, the previous data will be overwritten.



In UART communication, when this state occurs, a flag is set to notify the system of an overrun. → See also Overflow
Suitable Products