M50FLW040B View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M50FLW040B
STMicroelectronics
M50FLW040B Datasheet PDF : 64 Pages
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M50FLW040A
M50FLW040B
4-Mbit (5 × 64 Kbyte blocks + 3 × 16 × 4 Kbyte sectors)
3-V supply Firmware Hub / low-pin count Flash memory
Feature summary
â– Flash memory
– Compatible with either the LPC interface or
the FWH interface (Intel Spec rev1.1) used
in PC BIOS applications
– 5 Signal Communication Interface
supporting Read and Write Operations
– 5 Additional General Purpose Inputs for
platform design flexibility
– Synchronized with 33MHz PCI clock
â– 8 blocks of 64 Kbytes
– 5 blocks of 64 KBytes each
– 3 blocks, subdivided into 16 uniform
sectors of 4 KBytes each
Two blocks at the top and one at the bottom
(M50FLW040A)
One block at the top and two at the bottom
(M50FLW040B)
â– Enhanced security
– Hardware Write Protect Pins for Block
Protection
– Register-based Read and Write Protection
â– Supply voltage
– VCC = 3 to 3.6V for Program, Erase and
Read Operations
– VPP = 12V for Fast Program and Erase
â– Two interfaces
– Auto Detection of Firmware Hub (FWH) or
Low Pin Count (LPC) Memory Cycles for
Embedded Operation with PC Chipsets
– Address/Address Multiplexed (A/A Mux)
Interface for programming equipment
compatibility.
■Programming time: 10 µs typical
â– Program/Erase Controller
– Embedded Program and Erase algorithms
– Status Register Bits
PLCC32 (K)
TSOP32 (NB)
8 x 14mm
TSOP40 (N)
10 x 20mm
â– Program/Erase Suspend
– Read other Blocks/Sectors during Program
Suspend
– Program other Blocks/Sectors during Erase
Suspend
â– Electronic signature
– Manufacturer Code: 20h
– Device Code (M50FLW040A): 08h
– Device Code (M50FLW040B): 28h
â– Packages
– ECOPACK® (RoHS compliant)
October 2006
Rev 6
1/64
www.st.com
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