Rainbow Electronics AT45DB021D - Manual

Features
• Single 2.7V to 3.6V Supply
• RapidS Serial Interface: 66MHz Maximum Clock Frequency
– SPI Compatible Modes 0 and 3
• User Configurable Page Size
– 256-Bytes per Page
– 264-Bytes per Page
– Page Size Can Be Factory Pre-configured for 256-Bytes
• Page Program Operation
– Intelligent Programming Operation
– 1,024 Pages (256/264-Bytes/Page) Main Memory
• Flexible Erase Options
– Page Erase (256-Bytes)
– Block Erase (2-Kbytes)
– Sector Erase (32-Kbytes)
– Chip Erase (2-Mbits)
• One SRAM Data Buffer (256/264-Bytes)
• Continuous Read Capability through Entire Array
– Ideal for Code Shadowing Applications
• Low-power Dissipation
– 7mA Active Read Current Typical
– 25µA Standby Current Typical
– 15µA 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
Description
The AT45DB021D is a 2.7V, serial-interface Flash memory ideally suited for a wide
variety of digital voice-, image-, program code- and data-storage applications. The
AT45DB021D supports RapidS
™ serial interface for applications requiring very high
speed operations. RapidS serial interface is SPI compatible for frequencies up to
66MHz. Its 2-,162-,688-bits of memory are organized as 1,024-pages of 256-bytes or
264-bytes each. In addition to the main memory, the AT45DB021D also contains one
SRAM buffer of 256-/264-bytes. EEPROM emulation (bit or byte alterability) is easily
handled with a self-contained three step read-modify-write operation. Unlike conven-
tional 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.
2-megabit
2.7V Minimum
DataFlash
AT45DB021D
3638K–DFLASH–11/2012