n82802 Intel Corporation, n82802 Datasheet - Page 10

• Manufacturer Part Number: n82802
• Description: Firmware Hub Fwh
• Manufacturer: Intel Corporation

Intel
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®
82802AB/AC Firmware Hub
Intel Firmware Hub Interface
Address/Address-Multiplexed Interface
The Intel Firmware Hub (Intel FWH) interface consists primarily of a 5-signal communication interface
used to control the operation of the device in a system environment. The buffers for this interface were
designed to be PCI compliant. To ensure the effective delivery of security and manageability features, the
Intel FWH interface is the only way access the full feature set of the device. The Intel FWH interface is
equipped to operate at 33 MHz, synchronous with the PCI bus.
The A/A Mux refers to the multiplexed row and column addresses in this interface. This approach is
required so that the device can be tested and programmed quickly with automated test equipment (ATE)
or off-board PROM programmers in the OEM’s manufacturing flow. This interface also allows the
device to have an efficient programming interface with potentially large future densities, while still fitting
into a 32-pin package. Only basic reads, programming, and erasure of the nonvolatile memory blocks can
be performed through the A/A Mux interface. In this mode, the Intel FWH features, security features, and
registers are unavailable. A row/column (R/C#) pin determines which set of addresses (rows or columns)
is latched. See the A/A Mux pin description table for more information.
Nonvolatile Flash Memory Core
The primary feature of the Intel FWH component is a nonvolatile memory core based on Intel
Technology. This high-performance memory array is arranged in eight (4-Mbit device) or sixteen (8-
Mbit device) 64-KB blocks.
Intel
for 3-V systems, this component supports read operations at 3.3 V V
operations at 3.3 V and 12 V V
will increase factory throughput, but is not recommended for standard in-system FWH operation in the
platform, due to an 80-hr limit for 12 V on the V
programming is taking place. With the 3.3-V V
and V
the dedicated V
circuitry automatically configures the device for block erase and program operations. While current for
12-V programming will be drawn from V
that V
drawn from either pin.
®
PP
PP
Flash Technology enables fast factory programming and low-power designs. Specifically designed
may be tied together for a simple, low-power 3-V design. In addition to the voltage flexibility,
draws from the same supply as V
PP
pin provides complete data protection when V
PP
. The 12 V V
PP
CC
, 3.3-V programming solutions should design their board such
, and should assume that full programming current may be
PP
PP
option yields the fastest program performance, which
option (recommended for in-system operation), V
PP
pin over the lifetime of the device, whether or not
PP
≤ ≤ ≤ ≤ V
CC
PPLK
and block erase and program
. Internal V
PP
detection
®
Datasheet
Flash
CC
R