8 Mbit Firmware Hub
SST49LF008A
SST49LF008A8 Mb Firmware Hub for Intel 8xx Chipsets
Data Sheet
FEATURES:
• Firmware Hub for Intel 8xx Chipsets
• 8 Mbit SuperFlash memory array for code/data
storage
– 1024K x8
• Flexible Erase Capability
– Uniform 4 KByte Sectors
– Uniform 64 KByte overlay blocks
– 64 KByte Top Boot Block protection
– Chip-Erase for PP Mode Only
• Single 3.0-3.6V Read and Write Operations
• Superior Reliability
– Endurance:100,000 Cycles (typical)
– Greater than 100 years Data Retention
• Low Power Consumption
– Active Read Current: 6 mA (typical)
– Standby Current: 10 µA (typical)
• Fast Sector-Erase/Byte-Program Operation
– Sector-Erase Time: 18 ms (typical)
– Block-Erase Time: 18 ms (typical)
– Chip-Erase Time: 70 ms (typical)
– Byte-Program Time: 14 µs (typical)
– Chip Rewrite Time: 15 seconds (typical)
– Single-pulse Program or Erase
– Internal timing generation
• Two Operational Modes
– Firmware Hub Interface (FWH) Mode for
In-System operation
– Parallel Programming (PP) Mode for fast
production programming
• Firmware Hub Hardware Interface Mode
– 5-signal communication interface supporting
byte Read and Write
– 33 MHz clock frequency operation
– WP# and TBL# pins provide hardware write
protect for entire chip and/or top Boot Block
– Block Locking Register for all blocks
– Standard SDP Command Set
– Data# Polling and Toggle Bit for End-of-Write
detection
– 5 GPI pins for system design flexibility
– 4 ID pins for multi-chip selection
• Parallel Programming (PP) Mode
– 11-pin multiplexed address and
8-pin data I/O interface
– Supports fast In-System or PROM programming
for manufacturing
• CMOS and PCI I/O Compatibility
• Packages Available
– 32-lead PLCC
– 32-lead TSOP (8mm x 14mm)
– 40-lead TSOP (10mm x 20mm)
– Non-Pb (lead-free) packages available
• All non-Pb (lead-free) devices are RoHS compliant
PRODUCT DESCRIPTION
The SST49LF008A flash memory devices are designed to
be read-compatible with the Intel 82802 Firmware Hub
(FWH) device for PC-BIOS application. These devices pro-
vide protection for the storage and update of code and data
in addition to adding system design flexibility through five
general purpose inputs. Two interface modes are sup-
ported by the SST49LF008A: Firmware Hub (FWH) Inter-
face mode for in-system programming and Parallel
Programming (PP) mode for fast factory programming of
PC-BIOS applications.
The SST49LF008A flash memory devices are manufac-
tured with SST’s proprietary, high performance SuperFlash
technology. The split-gate cell design and thick-oxide tun-
neling injector attain better reliability and manufacturability
compared with alternate approaches. The SST49LF008A
devices significantly improve performance and reliability,
while lowering power consumption.
©2006 Silicon Storage Technology, Inc.
S71161-11-000
3/06
1
The SST49LF008A devices write (Program or Erase) with
a single 3.0-3.6V power supply. They use less energy dur-
ing Erase and Program than alternative flash memory tech-
nologies. The total energy consumed is a function of the
applied voltage, current and time of application. Since for
any given voltage range, the SuperFlash technology uses
less current to program and has a shorter Erase time, the
total energy consumed during any Erase or Program oper-
ation is less than alternative flash memory technologies.
The SST49LF008A products provide a maximum Byte-
Program time of 20 µsec. The entire memory can be
erased and programmed byte-by-byte typically in 15 sec-
onds when using status detection features such as Toggle
Bit or Data# Polling to indicate the completion of Program
operation. The SuperFlash technology provides fixed Erase
and Program times independent of the number of Erase/
Program cycles performed. Therefore the system software
The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.
Intel is a registered trademark of Intel Corporation.
These specifications are subject to change without notice.
SST [ SILICON STORAGE TECHNOLOGY, INC ]
