Overview of N250128 Qumony 128-Mbit Flash Memory
The N250128 Qumony from Micron Technology is a high-speed 128-Mbit flash memory device that operates at a 3 V power supply, featuring a SPI-compatible serial bus interface with a maximum clock frequency of 108 MHz. It supports a range of SPI protocols, including legacy SPI, Quad IO (QIO-SPI), and Dual I/O (DIO-SPI), leveraging these protocols to achieve an equivalent clock frequency of up to 432 MHz in XiP (eXecute in Place) mode.
Key Features and Flexibility
Performance: The device offers SPI-compatible interface with a clock frequency up to 108 MHz and supports continuous read operations across the entire memory through single instruction access, enhancing performance and efficiency for a variety of applications.
Versatility: Configurability is a strong suit of the N250128, with a range of options offered to adapt to different applications, including configurable number of dummy cycles and a flexible output buffer. It also includes a Fast POR instruction to decrease power-on time, and a reset function can be requested by the customer.
Security and Reliability
Protected Memory: The device includes a 64-byte OTP area that can be user-locked. It boasts software and hardware write protection for each 64-Kbyte sector and supports advanced security features like a unique ID code upon request.
Smart Protections: Additional smart protections are available upon request, ensuring the security of data stored on the device.
Durability: Designed for longevity, the flash memory guarantees over 100,000 program/erase cycles per sector and a data retention period of more than 20 years.
Package Options and Industry Standards
The flash memory comes in various RoHS-compliant packages, such as VDFPN8 and TBGA24, catering to space-sensitive applications. It follows the JEDEC standard with a two-byte electronic signature and has extended device identification capabilities.
Signal Descriptions and SPI Protocols
Starting with the signal descriptions, the datasheet outlines the functions of the serial data output (DQ1), serial data input (DQ0), Serial Clock (C), Chip Select (S), Hold or Reset, Write Protect, supply voltages, and ground. It emphasizes on SPI modes and covers extended SPI protocol operations, Dual I/O SPI protocol, and Quad SPI protocol in comprehensive detail.
Power Efficiency and Erase Capabilities
Subsector erase granularity is provided, highlighting the flexibility in data management with 4-Kbyte subsector erase capabilities. The 8 boot sectors can be erased with either bottom or top part selection, alongside full sector (64-Kbyte) erase options.
Environmental Compliance and Endurance
Micron Technology’s commitment to environmentally friendly products is evidenced by all packages being RoHS compliant. The durability of the N250128 is ensured by its high cycle counts and prolonged retention times, underpinning reliable and long-lasting performance.
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