Rainbow Electronics AT45DB321D User Manual
Megabit 2.7-volt dataflash, Features, Description

Features
•
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
1.
Description
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-stor-
age 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 alterabil-
ity) 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
32-megabit
2.7-volt
DataFlash
®
AT45DB321D
3597J–DFLASH–4/08
Document Outline
- Features
- 1. Description
- 2. Pin Configurations and Pinouts
- 3. Block Diagram
- 4. Memory Array
- 5. Device Operation
- 6. Read Commands
- 7. Program and Erase Commands
- 8. Sector Protection
- 9. Hardware Controlled Protection
- 10. Security Features
- 11. Additional Commands
- 12. Deep Power-down
- 13. “Power of 2” Binary Page Size Option
- 14. Manufacturer and Device ID Read
- 15. Command Tables
- 16. Power-on/Reset State
- 17. System Considerations
- 18. Electrical Specifications
- 19. Input Test Waveforms and Measurement Levels
- 20. Output Test Load
- 21. AC Waveforms
- 21.1 Waveform 1 - SPI Mode 0 Compatible (for frequencies up to 66 MHz)
- 21.2 Waveform 2 - SPI Mode 3 Compatible (for frequencies up to 66 MHz)
- 21.3 Waveform 3 - RapidS Mode 0 (FMAX = 66 MHz)
- 21.4 Waveform 4 - RapidS Mode 3 (FMAX = 66 MHz)
- 21.5 Utilizing the RapidS™ Function
- 21.6 Reset Timing
- 21.7 Command Sequence for Read/Write Operations for Page Size 512 Bytes (Except Status Register Read, Manufacturer and Device ID Read)
- 21.8 Command Sequence for Read/Write Operations for Page Size 528 Bytes (Except Status Register Read, Manufacturer and Device ID Read)
- 22. Write Operations
- 23. Read Operations
- 24. Detailed Bit-level Read Waveform - RapidS Serial Interface Mode 0/Mode 3
- 24.1 Continuous Array Read (Legacy Opcode E8H)
- 24.2 Continuous Array Read (Opcode 0BH)
- 24.3 Continuous Array Read (Low Frequency: Opcode 03H)
- 24.4 Main Memory Page Read (Opcode: D2H)
- 24.5 Buffer Read (Opcode D4H or D6H)
- 24.6 Buffer Read (Low Frequency: Opcode D1H or D3H)
- 24.7 Read Sector Protection Register (Opcode 32H)
- 24.8 Read Sector Lockdown Register (Opcode 35H)
- 24.9 Read Security Register (Opcode 77H)
- 24.10 Status Register Read (Opcode D7H)
- 24.11 Manufacturer and Device Read (Opcode 9FH)
- 25. Auto Page Rewrite Flowchart
- 26. Ordering Information
- 27. Packaging Information
- 28. Revision History
- 29. Errata