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