US Patent 7290073 Master slave serial bus apparatus

The present invention provides a master slave arrangement for providing communication between a master device and a slave device, the arrangement comprising: a first serial bus connecting said master device with an intermediate device and a second serial bus connecting said intermediate device with a slave device, said second serial bus comprising a data line, a clock line and one or more addressing lines, wherein said intermediate device i) interprets a request made by said master device; and (ii) sends a signal to said slave device over said one or more addressing lines to identify a memory location of said slave device to which said request is associated.