Bus master for connecting to peripheral components is connected to bus, has functional circuits for outputting bus data transfer request signals, arbiter and heuristic request initiator

摘要

The compatible bus master contains functional circuits for outputting a local request signal to request a data transfer on the bus and an arbiter with a circulating request control program and a heuristic request initiator. The compatible bus master is connected to a bus and contains several functional circuits for outputting a local request signal to request a data transfer on the bus and an arbiter with a circulating request control program (RIS) and a heuristic request initiator (HII). The request control program receives and stores the local request, generates a bus request signal and sends it to the initiator, which repeatedly passes it to the bus to request the bus status after the bus replies with a delay transmit abnormal termination. The initiator informs the control program that it is performing the transfer if the bus not respond with a delay-transmit abnormal termination. Independent claims are also included for the following: an arbiter for a compatible bus master and a determination method for an arbiter.