M50FW080 datasheet(7/56 Pages) STMICROELECTRONICS

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M50FW080

Summary description

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Summary description

The M50FW080 is an 8 Mbit (1Mbit x8) non-volatile memory that can be read, erased and

reprogrammed. These operations can be performed using a single low voltage (3.0 to 3.6V)

supply. For fast programming and fast erasing in production lines an optional 12V power

supply can be used to reduce the programming and the erasing times.

The memory is divided into blocks that can be erased independently so it is possible to

preserve valid data while old data is erased. Blocks can be protected individually to prevent

accidental Program or Erase commands from modifying the memory. Program and Erase

commands are written to the Command Interface of the memory. An on-chip Program/Erase

Controller simplifies the process of programming or erasing the memory by taking care of all

of the special operations that are required to update the memory contents. The end of a

program or erase operation can be detected and any error conditions identified. The

command set required to control the memory is consistent with JEDEC standards.

Two different bus interfaces are supported by the memory. The primary interface, the

Firmware Hub (or FWH) Interface, uses Intel’s proprietary FWH protocol. This has been

designed to remove the need for the ISA bus in current PC Chipsets; the M50FW080 acts

as the PC BIOS on the Low Pin Count bus for these PC Chipsets.

The secondary interface, the Address/Address Multiplexed (or A/A Mux) Interface, is

designed to be compatible with current Flash Programmers for production line programming

prior to fitting to a PC Motherboard.

In order to meet environmental requirements, ST offers the M50FW080 in ECOPACK®

packages. ECOPACK® packages are Lead-free and RoHS compliant. ECOPACK is an ST

trademark. ECOPACK specifications are available at: www.st.com.

M50FW080 数据表(PDF) 7 Page - STMicroelectronics