FM25C020U

FM25C020U 2K-Bit SPI Interface Serial CMOS EEPROM February 2002 FM25C020U 2K-Bit SPI™ Interface Serial CMOS EEPROM General Description The FM25C020U is a 2K (2,048) 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 Dataout (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 protection. For example, entering a 2-bit code into the STATUS REGISTER prevents programming in a selected block of memory and all programming can be inhibited by connecting the /WP pin to VSS; 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 consumption for a continuously reliable non-volatile solution for all markets. Functions I SPI MODE 0 interface I 2,048 bits organized as 256 x 8 I ...