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FM25C041U Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor

Il numero della parte FM25C041U
Spiegazioni elettronici  4K-Bit SPI??Interface Serial CMOS EEPROM
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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FM25C041U Rev. B
FM25C041U
4K-Bit SPI™ Interface
Serial CMOS EEPROM
Block Diagram
February 2002
© 2002 Fairchild Semiconductor Corporation
Instruction
Decoder
Control Logic
and Clock
Generators
High Voltage
Generator
and
Program
Timer
Instruction
Register
Program
Enable
Data In/Out Register
8 Bits
Data Out
Buffer
Non-Volatile
Status Register
Decoder
Address
Counter/
Register
EEPROM Array
Read/Write Amps
/CS
/HOLD
SCK
VCC
VSS
VPP
/WP
SI
SO
General Description
The FM25C041U is a 4K (4,096) bit serial interface CMOS
EEPROM (Electrically Erasable Programmable Read-Only
Memory). This device fully conforms to the SPI 4-wire protocol
which uses Chip Select (/CS), Clock (SCK), Data-in (SI) and Data-
out (SO) pins to synchronously control data transfer between the
SPI microcontroller and the EEPROM. In addition, the serial
interface allows a minimal pin count, packaging designed to
simplify PC board layout requirements and offers the designer a
variety of low voltage and low power options.
This SPI EEPROM family is designed to work with the 68HC11 or
any other SPI-compatible, high-speed microcontroller and offers
both hardware (/WP pin) and software ("block write") data protec-
tion. For example, entering a 2-bit code into the STATUS REGIS-
TER prevents programming in a selected block of memory and all
programming can be inhibited by connecting the /WP pin to V
SS;
allowing the user to protect the entire array or a selected section.
In addition, SPI devices feature a /HOLD pin, which allows a
temporary interruption of the datastream into the EEPROM.
Fairchild EEPROMs are designed and tested for applications
requiring high endurance, high reliability, and low power con-
sumption for a continuously reliable non-volatile solution for all
markets.
Functions
I SPI MODE 1 interface
I 4,096 bits organized as 512 x 8
I Extended 2.7V to 5.5V operating voltage
I 2.1 MHz operation @ 4.5V - 5.5V
I Self-timed programming cycle
I "Programming complete" indicated by STATUS REGISTER
polling
I /WP pin and BLOCK WRITE protection
Features
I Sequential read of entire array
I 4 byte "Page write" mode to minimize total write time per
byte
I /WP pin and BLOCK WRITE protection to prevent inadvert-
ent programming as well as programming ENABLE and
DISABLE opcodes.
I /HOLD pin to suspend data transfer
I Typical 1µA standby current (I
SB) for "L" devices and 0.1µA
standby current for "LZ" devices.
I Endurance: Up to 1,000,000 data changes
I Data retention greater than 40 years
SPI™ is a trademark of Motorola Corporation


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