Architectural Overview
The Intel® 82802 Firmware Hub (FWH) discrete component is compatible with several Intel chipset platforms and a variety of applications. The device operates under the LPC/FWH interface/protocol. The hardware features of this device include a Random Number Generator (RNG), five General-Purpose Inputs (GPIs), register-based block locking, and hardware-based locking. This combination of logic features and non-volatile memory enables better protection for the storage and update of platform code and data, adds platform flexibility through additional GPIs, and allows for quicker introduction of new security/manageability features into current and future platforms. The platform RNG, accessed through the Intel® Security Driver and third-party software, enables security features for the PC platform. See the product features listed previously for a list of more key features that the Intel FWH provides.

Product Features
■ Intel platform compatability
    - Enables security-enhanced platform infrastructure; facilitates option to remove ISA.
■ Firmware hub hardware interface mode
    - 5-Signal communication interface supporting byte-at-a-time reads and writes
    - Register-based read and write protection for each code/data storage block
    - Hardware write protect pins for the top boot block and the remaining code/data storage blocks
    - 5 Additional GPIs for platform design flexibility
    - Contains a hardware Random Number Generator (RNG) for enhancing platform security
    - Integrated Command User Interface (CUI) for requesting access to locking, programming, and erasing options. The CUI also handles requests for data residing in status, ID, and block-lock registers.
    - Operates with 33-MHz PCI clock and 3.3 V I/O.
■ Industry-standard packages (40L TSOP or 32L PLCC)
■ Two configurable interfaces
    - Firmware hub interface for platform operation
    - Address/Address-Multiplexed (A/A Mux) interface for programming during manufacturing
■ 4 or 8 Mbits of flash memory for platform code/data nonvolatile storage
    - Symmetrically blocked, 64-KB memory sections
    - Available in 8-Mbit (Intel® 82802AC) and 4- Mbit (Intel® 82802AB) densities
    - Automated byte program and block erase via an integrated Write State Machine (WSM)
■ Address/Address-Multiplexed (A/A Mux) interface/mode
    - 11-Pin multiplexed address and 8-pin data I/O interface
    - Supports fast on-board or out-of-system programming for manufacturing
■ Case temprature operating range
■ Power supply specifications
    - Vcc: 3.3 V ± 0.3 V
    - Vpp: 3.3 V and 12 V for fast programming, (80 hours maximum)