Intel RC28F256K3C120: A Comprehensive Technical Overview of the 256Mb NOR Flash Memory

The Intel RC28F256K3C120 represents a significant component in the landscape of non-volatile memory solutions, specifically engineered for applications demanding high reliability, fast read access, and excellent code execution capabilities. As a 256-Megabit (32-Megabyte) NOR Flash memory device, it serves as a critical building block in embedded systems across aerospace, automotive, industrial, and networking sectors.

Fabricated on a mature 130nm technology node, this memory chip balances performance, density, and cost-effectiveness. Its core architecture is organized as 256 Mbits, configured as 256K words x 8 bits or 128K words x 16 bits, providing design flexibility for systems with different data bus widths. A key feature of this device is its symmetric 128KB sectors, all of which are capable of individual erase operations. This sector architecture is essential for storing and managing multiple application code modules, boot code, and configuration data, allowing for efficient memory space utilization and firmware updates.

Performance is a cornerstone of this device. It supports a fast 120ns initial read access time, enabling efficient execution-in-place (XIP) for high-performance microprocessors and microcontrollers without the need to shadow code into RAM. The interface operates at a standard 3.0V VCC supply voltage (with a 12V VPP for accelerated programming), making it compatible with a wide range of legacy and contemporary system designs.

The RC28F256K3C120 is designed for robustness and longevity. It features an extended endurance of 100,000 program/erase cycles per sector, a critical specification for firmware that is frequently updated throughout the product's lifecycle. Furthermore, data retention is guaranteed for up to 20 years, ensuring data integrity in long-lifespan deployments. These specifications make it a high-reliability solution for mission-critical applications.

Programming and erasure are managed through a command-set interface compliant with the Common Flash Memory Interface (CFMI), simplifying integration and software driver development. The device also incorporates advanced functionality for protection and security, including hardware and software lockable sectors to prevent accidental or malicious overwrites of critical boot code.

In summary, the Intel RC28F256K3C120 is a workhorse of the NOR Flash world, offering a proven combination of density, speed, and exceptional reliability for complex embedded systems.

ICGOOODFIND

This memory device is an optimal choice for developers requiring a robust, high-endurance, and sector-manageable non-volatile storage solution for XIP applications in demanding environments.

Keywords:

1. NOR Flash Memory

2. Execute-in-Place (XIP)

3. Sector Erase Architecture

4. High Endurance

5. Non-Volatile Storage