Abstract: A data processing apparatus comprising a plurality of data processors, each data processor comprising: first logic operable in a first clock domain and further logic operable in a second clock domain, said first and second clock domains being asynchronous with each other; a synchroniser operable to synchronise a signal processed by said first logic to produce a signal synchronised to said second clock domain; a synchronised signal output operable to export from said data processor said synchronised signal output from said synchroniser; and a signal input operable to import a signal to said data processor, said data processor being operable to route said imported signal to said further logic; wherein said plurality of data processors are arranged to operate in parallel with each other and said data processing apparatus further comprises: combining logic arranged to receive said exported synchronised signals from each of said plurality of data processors and to combine said exported synchronised signals to prod

Abstract: A bridge circuit and method of transferring data is disclosed. The bridge circuit comprises a first interface circuit operable to receive data from a data source at a first data rate; a second interface circuit operable to transmit said data to a data receiver at a second data rate; a data coupling circuit comprising: a synchronous coupling circuit operable to pass said data synchronously between said first interface circuit and said second interface circuit; and an asynchronous coupling circuit operable to pass said data asynchronously between said first interface circuit and said second interface circuit. The bridge circuit further comprises control logic responsive to a synchronous transfer request signal indicating that either said first data rate is an integer multiple of said second data rate or said second data rate is an integer multiple of said first data rate to cause data to be passed by said synchronous coupling circuit once any data within said asynchronous coupling circuit has been emptied.