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A49LF004

4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory

AMIC Technology 

Preliminary

A49LF004

4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory

FEATURES

• Single Power Supply Operation

- Low voltage range: 3.0 V - 3.6 V for Read and Write

Operations

• Standard Intel Firmware Hub Interface

- Read compatible to Intel® 82802 Firmware

Hub devices

• Memory Configuration

- 512K x 8 (4 Mbit)

• Block Architecture

- 4Mbit: eight uniform 64KByte blocks

- Supports full chip erase for Address/Address

Multiplexed (A/A Mux) mode

• Automatic Erase and Program Operation

- Embedded Byte Program and Block/Chip Erase

algorithms

- Typical 10 µs/byte programming time

- Typical 1s block erase time

• Two Operational Modes

- Firmware Hub Interface (FWH) Mode for in-system

operation

- Address/Address Multiplexed (A/A Mux) Interface

Mode for programming equipment

• Firmware Hub (FWH) 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 (I/O7) and Toggle Bit (I/O6) features

- Block Locking Register for all blocks

- 4 ID pins for multi-chip 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 (I/O7) and Toggle Bit (I/O6) features

• Lower Power Consumption

- Typical 12mA active read current

- Typical 24mA program/erase current

• High Product Endurance

- Guarantee 100,000 program/erase cycles for each

block

- Minimum 20 years data retention

• Compatible Pin-out and Packaging

- 32-pin (8 mm x 14 mm) TSOP (TYPE I)

- 32-pin PLCC

GENERAL DESCRIPTION

The A49LF004 flash memory device is designed to be read-

compatible with the Intel 82802 Firmware Hub (FWH)

device for PC-BIOS application. This device is designed to

use a single low voltage, range from 3.0 Volt to 3.6 Volt

power supply to perform in-system or off-system read and

write operations. It provides 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 supported by the A49LF004: Firmware

Hub (FWH) Interface mode for In-System programming and

Address/Address Multiplexed (A/A Mux) mode for fast

factory programming of PC-BIOS applications.

The memory is divided into eight uniform 64Kbyte blocks

that can be erased independently without affecting the data

in other blocks. Blocks also can be protected individually to

prevent accidental Program or Erase commands from

modifying the memory. The Program and Erase operations

are executed by issuing the Program/Erase commands into

the command interface by which activating the internal

control logic to automatically process the Program/Erase

procedures. The device can be programmed on a byte-by-

byte basis after performing the Erase operation. In addition

to the Block Erase operation, the Chip Erase feature is

provided in A/A Mux mode that allows the whole memory to

be erased in one single Erase operation. The A49LF004

provides the status detection such as Data# Polling and

Toggle Bit Functions in both FWH and A/A Mux modes. The

process or completion of Program and Erase operations

can be detected by reading the status bits.

The A49LF004 is offered in 32-lead TSOP and 32-lead

PLCC packages. See Figures 1 and 2 for pin assignments

and Table 1 for pin descriptions.

PRELIMINARY (November, 2003, Version 0.0)

1

AMIC Technology, Corp.

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