AT49LW040-33TC ATMEL Corporation, AT49LW040-33TC Datasheet
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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
Part Number:
AT49LW040-33TC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Features
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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
CC
: 3.3V ± 0.3V
5
6
7
8
9
10
11
12
13
PLCC
29
28
27
26
25
24
23
22
21
IC (V
GNDa [GNDa]
VCCa [VCCa]
GND [GND]
VCC [VCC]
INIT [OE]
FWH4 [WE]
RFU [RY/BY]
RFU [I/O7]
IL
) [IC(V
IH
)]
[IC (V
[A10] FGPI4
IH
[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
[NC] NC
[NC] NC
[NC] NC
[NC] NC
[NC] NC
[NC] NC
[A5] WP
IL
)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
[ ] Designates A/A Mux Mode
TSOP
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
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]
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
1