STMicroelectronics AN2632 Application Note: Communication with Small Page NAND Flash

About this manual

This document presents a practical example of communication between an ST7 microcontroller (specifically the ST72651AR6) and Small Page NAND Flash memory using general purpose input/output ports. It covers the hardware interface requirements, signal descriptions, and firmware implementation details.

The note provides specific information on connecting NAND Flash devices to the microcontroller's I/O pins, including a port mapping table for the ST72651AR6. It also details the basic functions of the NAND Flash, such as command input, address insertion, and data writing, along with the corresponding bus cycles required for 128 Mb through 1 GB devices.

What's inside

• NAND Flash overview
• Signal description
• Memory array organization
• Hardware interface with microcontroller
• Firmware basics
• Command register operations
• Address input bus operations
• Data input bus operations
• Revision history

Frequently asked questions

Which specific NAND Flash devices are covered in this application note?

The document covers the following small page NAND Flash memory devices: NAND128W3A, NAND256W3A, NAND512W3A, and NANDO1GW3A.

Which microcontroller is used as the example for firmware description?

The ST72651AR6 microcontroller is used for the firmware description, though any ST7 MCU can be utilized.

What are the voltage supply options for these NAND Flash devices?

The devices operate with either a 1.8 V or 3 V voltage supply.