US Patent 7426600 Bus switch circuit and bus switch system

A bus switch circuit having plural master side interface circuits inputting/outputting signals for plural bus masters respectively, and one or plural slave side interface circuit(s) inputting/outputting signals for one or plural bus slave(s), is provided. The master side interface circuit and the slave side interface circuit input an interrupt signal inputted at least to one bus master, and establish a signal path between the plural bus masters and the one or plural bus slave(s) in accordance with the interrupt signal.