AT45DB321D 32Mbit,SPI接口DateFlash存储器

32M bit, 2.7-Volt Only Serial Interface Flash

The AT45DB321D is a 2.7-volt, serial-interface sequential access Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. The AT45DB321D supports RapidS serial interface for applications requiring very high speed operations. RapidS serial interface is SPI compatible for frequencies up to 66 MHz. Its 34,603,008 bits of memory are organized as 8,192 pages of 512 bytes or 528 bytes each. In addition to the main memory, the AT45DB321D also contains two SRAM buffers of 512/528 bytes each. The buffers allow the receiving of data while a page in the main Memory is being reprogrammed, as well as writing a continuous data stream. EEPROM emulation (bit or byte alterability) is easily handled with a self-contained three step read-modify-write operation. Unlike conventional Flash memories that are accessed randomly with multiple address lines and a parallel interface, the DataFlash uses a RapidS serial interface to sequentially access its data. The simple sequential access dramatically reduces active pin count, facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size. The device is optimized for use in many commercial and industrial applications where high-density, low-pin count, low-voltage and low-power are essential. To allow for simple in-system reprogrammability, the AT45DB321D does not require high input voltages for programming. The device operates from a single power supply, 2.7V to 3.6V, for both the program and read operations. The AT45DB321D is enabled through the chip select pin (CS) and accessed via a three-wire interface consisting of the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK).All programming and erase cycles are self-timed.

AT45DB321D 特性

• Single 2.7V - 3.6V Supply
• RapidS? Serial Interface: 66 MHz Maximum Clock Frequency
  – SPI Compatible Modes 0 and 3
• User Configurable Page Size
  – 512 Bytes per Page
  – 528 Bytes per Page
  – Page Size Can Be Factory Pre-configured for 512 Bytes
• Page Program Operation
  – Intelligent Programming Operation
  – 8,192 Pages (512/528 Bytes/Page) Main Memory
• Flexible Erase Options
  – Page Erase (512 Bytes)
  – Block Erase (4 Kbytes)
  – Sector Erase (64 Kbytes)
  – Chip Erase (32 Mbits)
• Two SRAM Data Buffers (512/528 Bytes)
  – Allows Receiving of Data while Reprogramming the Flash Array
• Continuous Read Capability through Entire Array
  – Ideal for Code Shadowing Applications
• Low-power Dissipation
  – 7 mA Active Read Current Typical
  – 25 μA Standby Current Typical
  – 5 μA Deep Power Down Typical
• Hardware and Software Data Protection Features
  – Individual Sector
• Sector Lockdown for Secure Code and Data Storage
  – Individual Sector
• Security: 128-byte Security Register
  – 64-byte User Programmable Space
  – Unique 64-byte Device Identifier
• JEDEC Standard Manufacturer and Device ID Read
• 100,000 Program/Erase Cycles Per Page Minimum
• Data Retention – 20 Years
• Industrial Temperature Range
• Green (Pb/Halide-free/RoHS Compliant) Packaging Options

AT45DB321D 订购型号

AT45DB321D 技术支持

1. ATMEL 爱特梅尔Flash 存储器AT45DB321D 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
4. Programmer Support for Serial Flash Devices. pdf (Other, 8 pages, revision C, updated 4/08)
5. MicroLeadFrame Packages Pad Landing Recommendations (15 pages, revision B, updated 09/06). pdf
   This application note provides PCB designers with a set of guidelines for successful board mounting of Atmel's DataFlash memories housed in the MicroLeadFrame (MLF) package.
6. AN-4: Using Atmel's DataFlash (30 pages, updated 11/02) . pdf
   Atmel's DataFlash is a new Flash family designed specifically for data storage applications. This Application Note describes this family.
7. DataFlash Binary Page Size (2 pages, revision A, updated 5/08) . pdf
   Factory Configured DataFlash Binary Page Size options