Overview
The AT45DB321D-SU-SL955 is a 32-Mbit serial interface, sequential access flash memory produced by Adesto Technologies. This device is designed to meet the needs of various digital applications, including voice, image, program code, and data storage. It features the Atmel RapidS serial interface, which is SPI compatible and supports high-speed operations up to 66MHz. The AT45DB321D is ideal for applications requiring fast and reliable data storage and retrieval.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage Supply | 2.5V - 3.6V or 2.7V - 3.6V |
| Serial Interface | Atmel RapidS, SPI compatible (modes 0 and 3) |
| Maximum Clock Frequency | 66MHz |
| Page Size | 512 bytes or 528 bytes (user configurable) |
| Number of Pages | 8,192 pages |
| Erase Options | Page erase (512 bytes), Block erase (4KB), Sector erase (64KB), Chip erase (32Mb) |
| SRAM Data Buffers | Two buffers, each 512/528 bytes |
| Memory Organization | 34,603,008 bits organized as 8,192 pages |
Key Features
- Single supply voltage: 2.5V - 3.6V or 2.7V - 3.6V
- Atmel RapidS serial interface with SPI compatibility up to 66MHz
- User configurable page size (512 bytes or 528 bytes)
- Flexible erase options: page, block, sector, and chip erase
- Two SRAM data buffers for continuous data stream and simultaneous data reception and reprogramming
- Ideal for code shadowing applications
- Continuous read capability through the entire array
Applications
The AT45DB321D-SU-SL955 is suited for a wide variety of digital applications, including:
- Digital voice storage
- Image storage
- Program code storage
- Data storage
- Code shadowing applications
Q & A
- What is the maximum clock frequency of the AT45DB321D-SU-SL955?
The maximum clock frequency is 66MHz. - What are the voltage supply options for this device?
The device operates on a single supply voltage of 2.5V - 3.6V or 2.7V - 3.6V. - What are the erase options available for the AT45DB321D-SU-SL955?
The device supports page erase (512 bytes), block erase (4KB), sector erase (64KB), and chip erase (32Mb). - How many SRAM data buffers does the AT45DB321D-SU-SL955 have?
The device has two SRAM data buffers, each with a capacity of 512/528 bytes. - What is the memory organization of the AT45DB321D-SU-SL955?
The memory is organized as 8,192 pages, each with 512 or 528 bytes. - Is the AT45DB321D-SU-SL955 SPI compatible?
Yes, the device is SPI compatible in modes 0 and 3. - What is the purpose of the SRAM data buffers in the AT45DB321D-SU-SL955?
The SRAM data buffers allow for receiving data while reprogramming the flash array and support continuous data stream operations. - What types of applications is the AT45DB321D-SU-SL955 suited for?
The device is suited for digital voice, image, program code, and data storage applications, as well as code shadowing applications. - How does the device handle read operations?
A valid instruction starts with the falling edge of CS, followed by the appropriate opcode and address. Data is clocked out on the falling edge of SCK. - What happens when the CS pin transitions from low to high during an operation?
The device will terminate the current operation and tri-state the output pin (SO).
