AT25DF321 32Mbit,SPI接口串行Flash存储器

32-Mbit, 70 MHz Serial Firmware DataFlash?, SPI Mode 0 and 3 Compatible, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Automatic Erase/Program Fail Checking/Reporting, JEDEC Standard ID, Hold Pin, 8-Lead SOIC (200-mil) and 16-Lead SOIC (300-mil).

The AT25DF321 is a serial interface Flash memory device designed for use in a wide variety of high-volume consumer based applications in which program code is shadowed from Flash memory into embedded or external RAM for execution. The flexible erase architecture of the AT25DF321, with its erase granularity as small as 4-Kbytes,makes it ideal for data storage as well, eliminating the need for additional data storage EEPROM devices. The physical sectoring and the erase block sizes of the AT25DF321 have been optimized to meet the needs of today's code and data storage applications. By optimizing the size of the physical sectors and erase blocks, the memory space can be used much more efficiently. Because certain code modules and data storage segments must reside by themselves in their own protected sectors, the wasted and unused memory space that occurs with large sectored and large block erase Flash memory devices can be greatly reduced. This increased memory space efficiency allows additional code routines and data storage segments to be added while still maintaining the same overall device density. The AT25DF321 also offers a sophisticated method for protecting individual sectors against erroneous or malicious program and erase operations. By providing the ability to individually protect and unprotect sectors, a system can unprotect a specific sector to modify its contents while keeping the remaining sectors of the memory array securely protected. This is useful in applications where program code is patched or updated on a subroutine or module basis, or in applications where data storage segments need to be modified without running the risk of errant modifications to the program code segments. In addition to individual sector protection capabilities, the AT25DF321 incorporates Global Protect and Global Unprotect features that allow the entire memory array to be either protected or unprotected all at once. This reduces overhead during the manufacturing process since sectors do not have to be unprotected one-by-one prior to initial programming. Specifically designed for use in 3-volt systems, the AT25DF321 supports read, program, and erase operations with a supply voltage range of 2.7V to 3.6V. No separate voltage is required for programming and erasing.

AT25DF321 特性

• Single 2.7V - 3.6V Supply
• Serial Peripheral Interface (SPI) Compatible
  – Supports SPI Modes 0 and 3
• 70 MHz Maximum Clock Frequency
• Flexible, Uniform Erase Architecture
  – 4-Kbyte Blocks
  – 32-Kbyte Blocks
  – 64-Kbyte Blocks
  – Full Chip Erase
• Individual Sector Protection with Global Protect/Unprotect Feature
  – Sixty-Four 64-Kbyte Physical Sectors
• Hardware Controlled Locking of Protected Sectors
• Flexible Programming
  – Byte/Page Program (1 to 256 Bytes)
• Automatic Checking and Reporting of Erase/Program Failures
• JEDEC Standard Manufacturer and Device ID Read Methodology
• Low Power Dissipation
  – 7 mA Active Read Current (Typical)
  – 4 μA Deep Power-Down Current (Typical)
• Endurance: 100,000 Program/Erase Cycles
• Data Retention: 20 Years
• Complies with Full Industrial Temperature Range
• Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options
  – 8-lead SOIC (200-mil wide)
  – 16-lead SOIC (300-mil wide)

AT25DF321 订购型号

AT25DF321 技术支持

1. ATMEL 爱特梅尔Flash 存储器AT25DF321 数据手册DataSheet 下载. PDF（PDF 文件格式完整版）
2. 串行Flash 产品选型指南（ Excel 文档格式）
3. ATMEL 爱特梅尔公司全线产品目录. pdf