2 Mbit Serial Flash Memory With Boot And Parameter SectorsThe EN25B20 is a 2M-bit (256K-byte) Serial Flash memory, with advanced write protection
mechanisms, accessed by a high speed SPI-compatible bus. The memory CAN be programmed 1 to
256 bytes at a time, using the Page Program instruction.
The EN25B20 has eight sectors including three sectors of 64KB, one sector of 32KB, one sector of
16KB, one sector of 8KB and two sectors of 4KB. This device is designed to allow either single
Sector at a time or full chip erase operation. The EN25B20 CAN protect boot code stored in the small
sectors for either bottom or top boot configurations. The device CAN sustain a minimum of 100K
program/erase cycles on each sector. By Eon Silicon Solution Inc.
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