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AT45D021

ATMEL Corporation
Part Number AT45D021
Manufacturer ATMEL Corporation
Description 2-Megabit 5-volt Only Serial DataFlash
Published Mar 23, 2005
Detailed Description Features • Single 4.5V - 5.5V Supply • Serial Interface Architecture • Page Program Operation • • • • • • • • • • – Sing...
Datasheet PDF File AT45D021 PDF File

AT45D021
AT45D021

Overview
Features • Single 4.
5V - 5.
5V Supply • Serial Interface Architecture • Page Program Operation • • • • • • • • • • – Single Cycle Reprogram (Erase and Program) – 1024 Pages (264 Bytes/Page) Main Memory Two 264-Byte SRAM Data Buffers – Allows Receiving of Data while Reprogramming of Nonvolatile Memory Internal Program and Control Timer Fast Page Program Time – 7 ms Typical 80 µs Typical Page to Buffer Transfer Time Low Power Dissipation – 15 mA Active Read Current Typical – 15 µA CMOS Standby Current Typical 10 MHz Max Clock Frequency Hardware Data Protection Feature Serial Peripheral Interface (SPI) Compatible – Modes 0 and 3 CMOS and TTL Compatible Inputs and Outputs Commercial and Industrial Temperature Ranges 2-Megabit 5-volt Only Serial DataFlash® AT45D021 Description The AT45D021 is a 5-volt only, serial interface Flash memory suitable for in-system reprogramming.
Its 2,162,688 bits of memory are organized as 1024 pages of 264bytes each.
In addition to the main memory, the AT45D021 also contains two data SRAM buffers of 264-bytes each.
The buffers allow receiving of data while a page in the main memory is being reprogrammed.
Unlike conventional Flash memories that are accessed randomly with multiple address lines and a parallel interface, the DataFlash uses a serial interface to sequentially access its data.
The simple serial interface facilitates hardware layout, increases system reliability, minimizes switching (continued) Pin Configurations Pin Name CS SCK SI SO WP RESET RDY/BUSY Function Chip Select Serial Clock Serial Input Serial Output Harware Page Write Protect Pin Chip Reset Ready/Busy TSOP Top View Type 1 RDY/BUSY RESET WP NC NC VCC GND NC NC NC CS SCK SI SO 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 NC NC NC NC NC NC NC NC NC NC NC NC NC NC GND NC NC CS SCK SI SO NC NC NC NC NC NC NC PLCC CS NC NC GND VCC NC NC Note: PLCC package pins 16 and 17 are DON’T CONNECT.
PLCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 2...


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