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AT45DB021B-RC Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT45DB021B-RC Datasheet(HTML) 1 Page - ATMEL Corporation |
1 / 33 page 1 Features • Single 2.7V - 3.6V Supply • Serial Peripheral Interface (SPI) Compatible • Page Program Operation – Single Cycle Reprogram (Erase and Program) – 1024 Pages (264 Bytes/Page) Main Memory • Supports Page and Block Erase Operations • Two 264-byte SRAM Data Buffers – Allows Receiving of Data while Reprogramming of Nonvolatile Memory • 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 • 20 MHz Max Clock Frequency • Hardware Data Protection Feature • 100% Compatible to AT45DB021 and AT45DB021A • 5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins • Commercial and Industrial Temperature Ranges Description The AT45DB021B is a 2.7-volt only, serial interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. Its 2,162,688 bits of memory are organized as 1024 pages of 264 bytes each. In addi- tion to the main memory, the AT45DB021B also contains two SRAM data buffers of 264 bytes each. The buffers allow receiving of data while a page in the main mem- ory is being reprogrammed, as well as reading or writing a continuous data stream. 2-megabit 2.7-volt Only DataFlash ® AT45DB021B Pin Configurations Pin Name Function CS Chip Select SCK Serial Clock SI Serial Input SO Serial Output WP Hardware Page Write Protect Pin RESET Chip Reset RDY/BUSY Ready/Busy CBGA Top View through Package A B C 123 VCC WP RESET GND RDY/BSY SI SCK CS SO TSOP Top View Type 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RDY/BUSY RESET WP NC NC VCC GND NC NC NC CS SCK SI SO NC NC NC NC NC NC NC NC NC NC NC NC NC NC 28-SOIC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 GND NC NC CS SCK SI SO NC NC NC NC NC NC NC VCC NC NC WP RESET RDY/BUSY NC NC NC NC NC NC NC NC 8-SOIC 1 2 3 4 8 7 6 5 SI SCK RESET CS SO GND VCC WP Rev. 1937F–DFLSH–10/02 |
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