AT49LW040-33TC ATMEL Corporation, AT49LW040-33TC Datasheet

AT49LW040-33TC

Manufacturer Part Number

AT49LW040-33TC

Description

8-megabit and 4-megabit Firmware Hub Flash Memory

Manufacturer

ATMEL Corporation

Datasheets

1.AT49LW040.pdf (29 pages)

2.AT49LW040-33TC.pdf (34 pages)

3.AT49LW040-33TC.pdf (34 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AT49LW040-33TC

Manufacturer:

ATMEL/爱特梅尔

Quantity:

20 000

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Features

•

Description

The AT49LW040 is a Flash memory device designed to be compatible with the Intel

82802AC and the Intel 82802AB Firmware Hub (FWH) devices for PC-Bios Applica-

tion. A feature of the AT49LW040 is the nonvolatile memory core. The high-

performance memory is arranged in eight 64-Kbyte sectors (see page 11).

The AT49LW040 supports two hardware interfaces: Firmware Hub (FWH) for in-sys-

tem operation and Address/Address Multiplexed (A/A Mux) for programming during

manufacturing. The IC (Interface Configuration) pin of the device provides the control

Pin Configurations

[I/O0] FWH0

[A7] FGPI1

[A6] FGPI0

Low Pin Count (LPC) BIOS Device

Functions as Firmware Hub for Intel 810, 810E, 820, 840 Chipsets

4M Bits of Flash Memory for Platform Code/Data Storage

Two Configurable Interfaces

Firmware Hub Hardware Interface Mode

Address/Address Multiplexed (A/A Mux) Interface

Power Supply Specifications

Industry-standard Packages

[A4] TBL

[A5] WP

[A3] ID3

[A2] ID2

[A1] ID1

[A0] ID0

– Uniform, 64-Kbyte Memory Sectors

– Automated Byte-program and Sector-erase Operations

– Firmware Hub (FWH) Interface for In-System Operation

– Address/Address Multiplexed (A/A Mux) Interface for Programming during

– 5-signal Communication Interface Supporting x8 Reads and Writes

– Read and Write Protection for Each Sector Using Software-controlled Registers

– Two Hardware Write-protect Pins: One for the Top Boot Sector, One for All Other

– Five General-purpose Inputs, GPIs, for Platform Design Flexibility

– Operates with 33 MHz PCI Clock and 3.3V I/O

– 11-pin Multiplexed Address and 8-pin Data Interface

– V

– (40-lead TSOP or 32-lead PLCC)

Manufacturing

Sectors

[ ] Designates A/A Mux Mode

: 3.3V ± 0.3V

PLCC

IC (V

GNDa [GNDa]

VCCa [VCCa]

GND [GND]

VCC [VCC]

INIT [OE]

FWH4 [WE]

RFU [RY/BY]

RFU [I/O7]

) [IC(V

)]

[IC (V

[A10] FGPI4

[VCC] VCC

[A9] FGPI3

[A8] FGPI2

[A7] FGPI1

[A6] FGPI0

[VPP] VPP

[RST] RST

[R/C] CLK

)] IC (V

[A4] TBL

(NC) NC

[NC] NC

[A5] WP

)

[ ] Designates A/A Mux Mode

TSOP

GNDa [GNDa]

VCCa [VCCa]

FWH4 [WE]

INIT [OE]

RFU [RY/BY]

RFU [I/O7]

RFU [I/O6]

RFU [I/O5]

RFU [I/O4]

VCC [VCC]

GND [GND]

FWH3 [I/O3]

FWH2 [I/O2]

FWH1 [I/O1]

FWH0 [I/O0]

ID0 [A0]

ID1 [A1]

ID2 [A2]

ID3 [A3]

4-megabit

Firmware Hub

Flash Memory

AT49LW040

Rev. 3342A–FLASH–6/03

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