2 System Board

FirmWare Hub (82802AB)

FirmWare Hub (82802AB)

The FWH (also known as flash memory) is connected to the LPC bus. It contains 4 Mbit (512 kB) of flash memory.

The hardware features of the FWH include: a Random Number Generator (RNG), five General Purpose Inputs (GPI), register-based block locking and hardware-based locking. An integrated combination of logic features and non-volatile memory enables better protection for the storage and update of system code and data, adds flexibility through additional GPIs, and allows for quicker introduction of security/manageability features.

The following table shows the available FWH features.

 

Feature

 

Feature

 

 

 

 

Platform Compatibility:

Two Configurable Interfaces:

 

Enables security-enhanced platform infrastructure.

 

FirmWare Hub interface for system operation.

 

Part of the Intel I840 chipset.

 

Address/Address Multiplexed (A/A Mux) interface.

 

 

 

 

• FirmWare Hub Interface Mode:

• 4 Mbits of Flash Memory for system code/data non-volatile

 

Five signal communication interface supporting x8 reads and

 

storage:

 

 

 

 

writes.

 

Symmetrically blocked, 64 Kbyte memory sections.

 

Register-based read and write protection for each code/data

 

Automated byte program and block erase through an

 

storage blocks.

 

integrated WSM (Write State Machine).

 

Five additional GPIs for system design and flexibility.

 

 

 

A hardware RNG (Random Number Generator).

 

 

 

Integrated CUI (Command User Interface) for requesting

 

 

 

access to locking, programming and erasing options. It also

 

 

 

handles requests for data residing in status, ID and block lock

 

 

 

registers.

 

 

 

Operates with 33 MHz PCI clock and 3.3 V input/output.

 

 

 

 

 

 

 

 

• A/A Mux Interface/Mode, supporting:

Power Supply Specifications:

 

11-pin multiplexed address and 8-pin data I/O interface.

 

Vcc: 3.3 V +/- 0.3 V.

 

Fast on-board or out-of-system programming.

 

Vpp: 3.3 V and 12 V for fast programming, 80 ns.

 

 

 

 

 

 

Industry Standard Packages:

• Case Temperature Operating Range.

 

40L TSOP or 32L PLCC.

 

 

 

 

 

 

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