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AT49LW080 Dataheets PDF



Part Number AT49LW080
Manufacturers ATMEL Corporation
Logo ATMEL Corporation
Description 8-megabit and 4-megabit Firmware Hub Flash Memory
Datasheet AT49LW080 DatasheetAT49LW080 Datasheet (PDF)

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 H.

  AT49LW080   AT49LW080


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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) • • 8-megabit and 4-megabit Firmware Hub Flash Memory AT49LW080 AT49LW040 • • • Description The AT49LW080 and the AT49LW040 are Flash memory devices designed to be compatible 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 FGPI2 [A8] FGPI3 [A9] RST [RST] VPP [VPP] VCC [VCC] CLK [R/C] FGPI4 [A10] (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 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] [ ] Designates A/A Mux Mode [I/O1] FWH1 [I/O2] FWH2 [GND] GND [I/O3] FWH3 [I/O4] RFU [I/O5] RFU [I/O6] RFU 14 15 16 17 18 19 20 [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 4 3 2 1 32 31 30 29 28 27 26 25 24 23 22 21 IC (VIL) [IC(VIH)] GNDa [GNDa] VCCa [VCCa] GND [GND] VCC [VCC] INIT [OE] FWH4 [WE] RFU [RY/BY] RFU [I/O7] [ ] Designates A/A Mux Mode Rev. 1966C–FLASH–03/02 1 The AT49LW080/040 supports two hardware interfaces: Firmware Hub (FWH) for insystem operation and Address/Address Multiplexed (A/A Mux) for programming during manufacturing. The IC (Interface Configuration) pin of the device provides the control between the interfaces. The interface mode needs to be selected prior to power-up or before return from reset (RST or INIT low to high transition). An internal Command User Interface (CUI) serves as the control center between the two device interfaces (FWH and A/A Mux) and internal operation of the nonvolatile memory. A valid command sequence written to the CUI initiates device automation. Specifically designed for 3V systems, the AT49LW080/040 supports read operations at 3.3V and sector erase and program operations at 3.3V and 12V VPP . The 12V V PP option renders the fastest program performance which will increase factory throughput, but is not recommended for standard in-system FWH operation in the platform. With the 3.3V VPP option, VCC and VPP should be tied together for a simple, low-power 3V design. In addition to the voltage flexibility, the dedicated VPP pin gives complete data protection when VPP ≤ V PPLK. Internal V PP detection circuitry automatically configures the device for sector erase and program operations. Note that, while current for 12V programming will be drawn from VPP, 3.3V programming board solutions should design such that VPP draws from the same supply as VCC, and should assume that full programming current may be drawn from either pin. Firmware Hub Interface The Firmware Hub (FWH) interface is designed to work with the I/O Controller Hub (ICH) during platform operation. The FWH interface consists primarily of a five-signal communication interface used to control the operation of the device in a system environment. The buffers for this interface are PCI compliant. To ensure the effective delivery of security and manageability features, the FWH interface is the only way to get access to the full feature set of the device. The FWH interface is equipped to operate at 33 MHz, synchronous with the PCI bus. Address/Address Multiplexed Interface The A/A Mux interface is designed as a programming interface for OEMs to use during motherboard manufacturing or component pre-programm.


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