SST49LF040中文资料SST数据手册PDF规格书

PRODUCT DESCRIPTION

The SST49LF040 flash memory devices are designed to interface with the LPC bus for PC and Internet Appliance application in compliance with Intel Low Pin Count (LPC) Interface Specification 1.0. Two interface modes are supported by the SST49LF040: LPC mode for In-System operation and Parallel Programming (PP) mode to interface with programmer equipment.

FEATURES:

• LPC Interface Flash

– SST49LF040: 512K x8 (4 Mbit)

• Conforms to Intel LPC Interface Specification 1.0

• 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: 8 seconds (typical)

– Single-pulse Program or Erase

– Internal timing generation

• Two Operational Modes

– Low Pin Count (LPC) Interface mode for in-system operation

– Parallel Programming (PP) mode for fast production programming

• LPC 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

– Standard SDP Command Set

– Data# Polling and Toggle Bit for End-of-Write detection

– 5 GPI pins for system design flexibility

– ID pins for multi-chip selection

– Decode both top and bottom regions of the system memory map

• Parallel Programming (PP) Mode

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

– Supports fast programming In-System on pro grammer equipment

• CMOS and PCI I/O Compatibility

• Packages Available

– 32-lead PLCC

– 32-lead TSOP (8mm x 14mm)