Firmware Hub (82802Ab) - HP Kayak xu700 Technical Reference Manual

• Platform Compatibility:
Enables security-enhanced platform infrastructure.
Part of the Intel I840 chipset.
• FirmWare Hub 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 (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:
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.
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
54
• Two Configurable Interfaces:
FirmWare Hub interface for system operation.
Address/Address Multiplexed (A/A Mux) interface.
• 4 Mbits of Flash Memory for system code/data non-volatile
storage:
Symmetrically blocked, 64 Kbyte memory sections.
Automated byte program and block erase through an
integrated WSM (Write State Machine).
• Power Supply Specifications:
Vcc: 3.3 V +/- 0.3 V.
Vpp: 3.3 V and 12 V for fast programming, 80 ns.
• Case Temperature Operating Range.
.
Feature