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AT49LW040-33TC fiches techniques PDF

ATMEL Corporation - 8-megabit and 4-megabit Firmware Hub Flash Memory

Numéro de référence AT49LW040-33TC
Description 8-megabit and 4-megabit Firmware Hub Flash Memory
Fabricant ATMEL Corporation 
Logo ATMEL Corporation 





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AT49LW040-33TC fiche technique
Features
Low Pin Count (LPC) BIOS Device
Functions as Firmware Hub for Intel 810, 810E, 820, 840 Chipsets
8M or 4M Bits of Flash Memory for Platform Code/Data Storage
– Uniform, 64-Kbyte Memory Sectors
– Available in 8M Bits (AT49LW080) and 4M Bits (AT49LW040)
– Automated Byte-program and Sector-erase Operations
Two Configurable Interfaces
– Firmware Hub (FWH) Interface for In-System Operation
– Address/Address Multiplexed (A/A Mux) Interface for Programming during
Manufacturing
Firmware Hub Hardware Interface Mode
– 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
Sectors
– Five General-purpose Inputs, GPIs, for Platform Design Flexibility
– Operates with 33 MHz PCI Clock and 3.3V I/O
Address/Address Multiplexed (A/A Mux) Interface
– 11-pin Multiplexed Address and 8-pin Data Interface
– Supports Fast On-board or Out-of-system Programming
Power Supply Specifications
– VCC: 3.3V ± 0.3V
– VPP: 3.3V and 12V for Fast Programming
Industry-standard Packages
– (40-lead TSOP or 32-lead PLCC)
Description
The AT49LW080 and the AT49LW040 are Flash memory devices designed to be com-
patible with the Intel 82802AC and the Intel 82802AB Firmware Hub (FWH) devices
for PC-Bios Application. A feature of the AT49LW080/040 is the nonvolatile memory
core. The high-performance memory is arranged in eight (AT49LW040) or sixteen
(AT49LW080) 64-Kbyte sectors (see page 13).
Pin Configurations
PLCC
TSOP
[A7] FGPI1
[A6] FGPI0
[A5] WP
[A4] TBL
[A3] ID3
[A2] ID2
[A1] ID1
[A0] ID0
[I/O0] FWH0
5
6
7
8
9
10
11
12
13
29 IC (VIL) [IC(VIH)]
28 GNDa [GNDa]
27 VCCa [VCCa]
26 GND [GND]
25 VCC [VCC]
24 INIT [OE]
23 FWH4 [WE]
22 RFU [RY/BY]
21 RFU [I/O7]
(NC) NC
[IC (VIH)] IC (VIL)
[NC] NC
[NC] NC
[NC] NC
[NC] NC
[A10] FGPI4
[NC] NC
[R/C] CLK
[VCC] VCC
[VPP] VPP
[RST] RST
[NC] NC
[NC] NC
[A9] FGPI3
[A8] FGPI2
[A7] FGPI1
[A6] FGPI0
[A5] WP
[A4] TBL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 GNDa [GNDa]
39 VCCa [VCCa]
38 FWH4 [WE]
37 INIT [OE]
36 RFU [RY/BY]
35 RFU [I/O7]
34 RFU [I/O6]
33 RFU [I/O5]
32 RFU [I/O4]
31 VCC [VCC]
30 GND [GND]
29 GND [GND]
28 FWH3 [I/O3]
27 FWH2 [I/O2]
26 FWH1 [I/O1]
25 FWH0 [I/O0]
24 ID0 [A0]
23 ID1 [A1]
22 ID2 [A2]
21 ID3 [A3]
[ ] Designates A/A Mux Mode
[ ] Designates A/A Mux Mode
8-megabit and
4-megabit
Firmware Hub
Flash Memory
AT49LW080
AT49LW040
Rev. 1966C–FLASH–03/02
1

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