Serial data receiving device

DETAILED DESCRIPTION It is therefore an object of the present invention to provide a serial data receiving device which is capable of identifying the data correctly even though the received data contains some degrees of error and/or different numbers of bits.
The object of the present invention can be achieved by a serial data receiving device which is capable of identifying serial data received even though the received data contains some degrees of error and/or different numbers of bits, the serial data receiving device includes a first storage unit for receiving serial data and for storing the received serial data, a second storage unit for storing identification data, and a unit for comparing the serial data stored in the first storage unit with the identification data stored in the second storage unit and for outputting a detection signal in accordance with a result of the comparison.
In operation, the first storage unit receives and holds serial data, the second storage unit holds identification data, and the comparing unit outputs a detection signal when the serial data received by the first storage unit and the identification data match by predetermined numbers of bits.
Therefore, even though the input serial data does not match the identification data completely, a detection signal is output.
In this way, data can be identified even if an error is contained in the identification data, so that the load of the software can be reduced.
Preferably, the serial data receiving unit further includes a unit connected to the comparing unit for determining the serial data stored in the first storage unit to be matched with the identification data stored in the second storage unit.
More preferably, the comparing unit is connected to both of the first storage unit and the second storage unit and capable of outputting the detection signal at a time when the determining unit determines that a predetermined number of bits in the serial data are matched with the predetermined numbers of bits in the identification data