HP Workstation x2000 hp workstation x2000 - Technical Reference and Troublesho - Page 69

System Board FirmWare Hub (82802AB) Feature Feature • Platform compatibility: - Enables security-enhanced platform infrastructure - Part of the Intel I840 chipset • Two configurable interfaces: - FWH interface for system operation - Address/Address Multiplexed (A/A Mux) interface • FWH interface mode: - Five signal communication interface supporting x8 reads and writes - Register-based read and write protection for each code/data storage blocks - Five additional GPIs for system design and flexibility - A hardware RNG - Integrated Command User Interface (CUI) for requesting access to locking, programming, and erasing options. Also handles requests for data residing in status, ID, and block lock registers. - Operates with 33MHz PCI clock and 3.3V I/O • 4Mbits of flash memory for system code/data nonvolatile storage: - Symmetrically blocked, 64KB memory sections - Automated byte program and block erase through an integrated Write State Machine (WSM) • A/A Mux Interface/Mode, supporting: - 11-pin multiplexed address and 8-pin data I/O interface - Fast on-board or out-of-system programming • Industry standard packages: - 40L TSOP or 32L PLCC • Power supply specifications: - Vcc: 3.3V +/- 0.3V - Vpp: 3.3V and 12V for fast programming, 80ns • Case temperature operating range Chapter 2 69