ONFI Advantages

The Open NAND Flash Interface (ONFI) is a collaboration among Micron and many other NAND Flash suppliers, controller manufacturers, and designers. The primary goal of the ONFI working group is to develop open standards for the interface used to communicate with NAND Flash memory—standards that will increase compatibility and interoperability among conforming NAND devices from different vendors. This, in turn, will increase the supply base for standard devices, reduce design time, and speed time to market.

You probably have more questions about the specifics of ONFI. We've created this page as a resource center for ONFI questions. Read on for information about ONFI's features and benefits, a set of FAQs, and links to technical documents and presentations to find out how ONFI can help you reduce design and test time.

Key Features

  • Parameter page solves inconsistencies among devices by describing revision info, features, organization timing, and other vendor-specific data
  • Asynchronous and source-synchronous support
  • Backward compatibility simplifies qualification for new NAND devices
  • Low-power DDR I/O
  • Scalability for high-density applications
  • Broad support from top-level companies, including Micron, Intel, Hynix, ST Microelectronics, Phison, Sony, and more than 60 others

Why Use ONFI?

Faster, Easier Design-In —ONFI's parameter page provides the controller with all of the device's relevant capabilities for quicker design, qualification, and testing.

Higher Speeds —The bidirectional source-synchronous DQS and scalable I/O interface provide some of the fastest NAND data rates possible. And they make optimizing one NAND device (or ten) easy.

No Requalification —Standardized compatibility enables pin and function drop-in compatibility and integration. ONFI-standardized devices can use the same firmware and software to avoid expensive driver testing.

Flexible Packaging—ONFI's industry-standard BGA package accommodates both asynchronous and source-synchronous interfaces, reduces noise, and offers excellent signal integrity.