PORT-ADAPTER FÜR EINEN BUS MIT HOHER BANDBREITE

摘要

There is described a method of selectively determining an operating frequency for a SPI-4 bus of a host computer system that uses a port adapter. The operating frequency may be different than a conventional SPI-4 bus operating frequency. The method includes issuing a query from a host computer system having a SPI-4 bus to a port adapter. The port adapter comprises a SPI-4 bus that can be coupled to a host system for control and data between the host and the SPI-4 device, a control bus coupled in parallel with the SPI-4 bus between the host system and the port adapter, interface logic that interfaces the SPI-4 bus and the control bus to one of a plurality of line interfaces, and an identification repository. The method also includes receiving, from the identification repository, an identification of the port adapter and determining, based on the information received from the identification repository, whether the host system SPI-4 bus can operate at a frequency that is compatible with at least one of the SPI-4 bus operating frequencies that are supported by the port adapter. An operating frequency may then be set for the host system SPI-4 bus equal to a selected one of the SPI-4 bus operating frequencies that are supported by the port adapter. Related apparatus and port adapter aspects are also provided.