A49FL004

The A49FL004 is a 4 Mbit 3.0 Volt-only Flash Memories used for BIOS storage in PCs and Notebooks. This device is designed to use a single low voltage, ranging from 3.0 Volt to 3.6 Volt, power supply to perform in-system or off-system read, erase and program operations. The device conforms to Intel® Low Pin Count (LPC) Interface specification revision 1.1 and also is compatible with Intel 82802 Firmware Hub (FWH) for most PC and Notebook applications.

The A49FL004 supports two configurable interfaces: In-system hardware interface which can automatic detect the FWH or LPC memory cycle for in-system read and write operations, and Address/Address Multiplexed (A/A Mux) interface for fast manufacturing on EPROM Programmers. This device is designed to work with both Intel Family chipset and Non-Intel Family Chipset, it will provide PC and Notebook manufacturers great flexibility and simplicity for design, procurement, and material inventory. The memory array of A49FL004 is divided into 128 uniform 4 KByte sectors or 8 uniform 64 KByte blocks (sector group - consists of sixteen adjacent sectors).

The sector or block erase feature in the A49FL004 allows user to flexibly erase a memory area as 4Kbyte or 64 KByte by one single erase operation without affecting the data in others. The chip erase feature allows the whole memory to be erased in one single erase operation. The device can be programmed on a byteby- byte basis after performing the erase operation. The program operation of A49FL004 is executed by issuing the program command code into command register. The internal control logic automatically handles the programming voltage ramp-up and timing. The erase operation of the device is also executed by issuing the sector, block, or chip erase command code into command register. The internal control logic automatically handles the erase voltage rampup and timing.

The device offer Data Polling and Toggle Bit functions in FWH/LPC and A/A Mux modes, the progress or completion of program and erase operation can be detected by reading the Data Polling on I/O7 or Toggle Bit on I/O6. The A49FL004 has a 64 KByte top boot block. The boot block can be write protected by a hardware method controlled by the TBL pin or a register-based protection turned on/off by the Block Locking Registers (FWH or LPC mode only). The rest of blocks except boot block in the device also can be write protected by WP pin or Block Locking Registers (FWH or LPC mode only). The A49FL004 is manufactured on AMIC 's advanced nonvolatile technology. The device is offered in 32-pin TSOP and PLCC packages with optional environmental friendly lead-free package.