82802AC datasheet(7/53 Pages) INTEL

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Intel

® 82802AB/AC Firmware Hub

Datasheet

Intel® 82802AB/AC Firmware Hub

(FWH)

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)

The Intel® 82802 (FWH) firmware hub may contain design defects or errors known as errata that may cause the products to

deviate from published specifications. Current characterized errata are available upon request.

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