Intel JS28F640J3C115: A Comprehensive Technical Overview of the 64Mb NOR Flash Memory Chip
The Intel JS28F640J3C115 represents a significant component within the landscape of non-volatile memory solutions. As a 64-megabit (8-megabyte) NOR Flash memory chip, it is engineered for applications requiring reliable code storage and execution, often referred to as Execute-In-Place (XIP) functionality. This technical overview delves into its architecture, key features, and primary applications.
Fabricated on a mature 130nm process technology, this chip is organized as 8,388,608 words x 8 bits or 4,194,304 words x 16 bits, providing design flexibility for different system bus widths. It operates on a single 3.0V power supply (2.7V - 3.6V) for all functions—read, program, and erase—simplifying power management design. A cornerstone of its performance is the symmetric memory architecture, which divides the total memory into 128 uniform 64-KB blocks. This structure is fundamental for efficient erase operations, as each block can be erased independently without affecting others.
The device offers high-performance read operations, with access times as low as 90ns and the capability to support a burst read mode for rapid data streaming. For writing data, it utilizes the reliable Command Query Interface (CQI) for software data protection and an advanced 1.8V/3V programming algorithm that allows for faster programming times and reduced power consumption during write operations.
A critical feature of the JS28F640J3C115 is its robust hardware and software protection mechanism. It incorporates absolute and toggle bit protection to prevent accidental modification of critical boot code sections. Furthermore, it includes a 64-bit unique device identifier for secure authentication and inventory management. The chip is designed for high endurance, supporting a minimum of 100,000 program/erase cycles per block and offering 20 years of data retention, ensuring long-term reliability in demanding environments.
Its primary applications are found in embedded systems where reliability is paramount. It is an ideal solution for storing boot code, operating system kernels, and application code in a wide array of products, including networking equipment (routers, switches), telecommunications infrastructure, industrial control systems, and automotive electronics.
ICGOOODFIND: The Intel JS28F640J3C115 is a robust and reliable NOR Flash memory solution, distinguished by its symmetric block architecture, Execute-In-Place capability, and comprehensive data protection features. It remains a trusted choice for mission-critical embedded systems requiring non-volatile code storage and fast, reliable access.
Keywords: NOR Flash Memory, Execute-In-Place (XIP), Symmetric Block Architecture, Hardware Data Protection, Non-Volatile Storage.
