Pitot Static on the 777 are fed to ADM (3 for pitot and 3 for static) the ADMs feeds 3 separate arinc 629 bus.The 629 bus feeds the ADRIU, SAARU( for standby instruments) and the ACMF cards in the AIMs cabinet. The ACMS collects all data engine data ,air data, navigation data etc. The ACMF send this to the transponder , FDR , EADI, EICAS etc.