HP Workstation x2000 hp workstation x2000 - Technical Reference and Troublesho - Page 70
A/A Mux interface
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System Board FirmWare Hub (82802AB) The FWH includes two hardware interfaces: • FWH interface • A/A Mux interface The Interface Configuration (IC) pin on the FWH provides the control between these interfaces. You must select the interface mode prior to power-up or before return from reset (RST# or INIT# low to high transition). The FWH interface works with the ICH2 during system operation, while the A/A Mux interface is designed as a programming interface for component preprogramming. An internal CUI serves as the control center between the FWH and A/A Mux interfaces, and internal operation of the nonvolatile memory. A valid command sequence written to the CUI initiates device automation. An internal WSM automatically executes the algorithms and timings necessary for block erase and program operations. 70 Chapter 2