1. 嵌入式微控制器和微处理器
   8位单片机
   16 位单片机
   32位ARM核微处理器
   AVR 单片机
   DSP 数字信号处理
   其他专用单片机
2. 存储器
   非易失性存储器NVRAM
   同步动态存储器SDRAM
   EEPROM 存储器
   Flash 存储器
   其他
3. 系统管理器件
   监控电路（电压监控器）
   低功耗复位器
4. Interface 接口器件
   RS-232接口
   RS-485/422接口
   CAN接口
   USB 接口
   LVDS与RF接口
   其他接口
5. 数据转换器
   模数转换器
   数模转换器
   音频与触摸屏控制器
6. 电源管理器件
   标准线性电源
   低压差稳压器
   DC/DC转换器
   AC/DC转换器
   电压基准
   电池管理
   PWM控制器
   电源模块与功率器件
   其它
7. 时钟管理 定时器 计数器
8. 数字电位器 DCP
9. 开关器件
10. 传感器
11. 可编程逻辑器件
    FPGA 现场可编程逻辑
    CPLD 复杂可编程逻辑器件
    其它 可编程系统器件
12. 逻辑电路
13. 其他

首页＞ATMEL 爱特梅尔＞DataFlash存储器＞AT45DB041B

ATMEL 爱特梅尔串行FLASH 存储器AT45DB041B AT45DB041B 概述 The AT45DB041B is an SPI compatible serial interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. Its 4,325,376 bits of memory are organized as 2048 pages of 264 bytes each. In addition to the main memory, the AT45DB041B also contains two SRAM data buffers of 264 bytes each.
The buffers allow receiving of data while a page in the main memory is being reprogrammed,as well as reading or 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 SPI serial interface to sequentially access its data. DataFlash supports SPI mode 0 and mode 3. The simple serial interface facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size and active pin count. 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. The device operates at clock frequencies up to 20 MHz with a typical active read current consumption of 4 mA. To allow for simple in-system reprogrammability, the AT45DB041B does not require high input voltages for programming. The device operates from a single power supply,2.5V to 3.6V or 2.7V to 3.6V, for both the program and read operations. The
AT45DB041B is enabled through the chip select pin (CS) and accessed via a threewire
interface consisting of the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK).
All programming cycles are self-timed, and no separate erase cycle is required before
programming.
When the device is shipped from Atmel, the most significant page of the memory array may not
be erased. In other words, the contents of the last page may not be filled with FFH. AT45DB041B 特性

• Single 2.5V - 3.6V or 2.7V - 3.6V Supply
  • Serial Peripheral Interface (SPI) Compatible
  • 20 MHz Max Clock Frequency
  • Page Program Operation
  – Single Cycle Reprogram (Erase and Program)
  – 2048 Pages (264 Bytes/Page) Main Memory
  • Supports Page and Block Erase Operations
  • Two 264-byte SRAM Data Buffers – Allows Receiving of Data
  while Reprogramming the Flash Memory Array
  • Continuous Read Capability through Entire Array
  – Ideal for Code Shadowing Applications
  • Low Power Dissipation
  – 4 mA Active Read Current Typical
  – 2 μA CMOS Standby Current Typical
  • Hardware Data Protection Feature
  • 5.0V-tolerant Inputs: SI, SCK, CS, RESET, and WP Pins
  • Commercial and Industrial Temperature Ranges
  • Green (Pb/Halide-free/RoHS Compliant) Package Options

AT45DB041B 订购型号