AT49LW040

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 non...