GENERAL DESCRIPTION
The A49FL004 is a 4 Mbit 3.0 Volt-only Flash Memories used for BIOS storage in PCs and Notebooks. This device is designed to use a single low voltage, ranging from 3.0 Volt to 3.6 Volt, power supply to perform in-system or off-system read, erase and program operations. The device conforms to Intel® Low Pin Count (LPC) Interface specification revision 1.1 and also is compatible with Intel 82802 Firmware Hub (FWH) for most PC and Notebook applications.

FEATURES
• Single Power Supply Operation
    - Low voltage range: 3.0 V - 3.6 V
• Standard Intel Firmware Hub/LPC Interface
    - Read compatible to Intel® 82802 Firmware Hub devices
    - Conforms to Intel LPC Interface Specification Revision 1.1
• Memory Configuration
    - 512K x 8 (4 Mbit)
• Block Architecture
    - Uniform 4 KBytes Sectors
    - Uniform 64 KByte overlay blocks
    - Support full chip erase for Address/Address Multiplexed (A/A Mux) mode
• Automatic Erase and Program Operation
    - Build-in automatic program verification for extended product endurance
    - Typical 10 µs/byte programming time
    - Typical x s sector erase time
    - Typical y s block erase time
    - Typical z s chip erase time
• Two Configurable Interfaces
    - In-System hardware interface: Auto detection of Firmware Hub (FWH) or Low Pin Count (LPC) Interface for in-system read and write operations
    - Address/Address Multiplexed (A/A Mux) Interface for programming on EPROM Programmers during manufacturing
• Firmware Hub (FWH)/Low Pin Count (LPC) Mode
    - 33 MHz synchronous operation with PCI bus
    - 5-signal communication interface for in-system read and write operations
    - Standard SDP Command Set
    - Data Polling and Toggle Bit features
    - Block Locking Register for all blocks
    - Register-based read and write protection for each block
    - 4 ID pins for multiple chips selection
    - 5 GPI pins for General Purpose Input Register
    - TBL pin for hardware write protection to Boot Block
    - WP pin for hardware write protection to whole memory array except Boot Block

• Address/Address Multiplexed (A/A Mux) Mode
    - 11-pin multiplexed address and 8-pin data I/O interface
    - Supports fast programming on EPROM programmers
    - Standard SDP Command Set
    - Data Polling and Toggle Bit features
• Lower Power Consumption
    - Typical 12mA active read current
    - Typical 17mA program/erase current
• High Product Endurance
    - Guarantee 100,000 program/erase cycles per single sector (preliminary)
    - Minimum 20 years data retention
• Compatible Pin-out and Packaging
    - 32-pin (8 mm x 14 mm) TSOP
    - 32-pin PLCC
    - Optional lead-free (Pb-free) package
• Hardware Data Protection