STMicroelectronics AN840 Coded Lock Application Note

About this manual

This document details the development of a coded lock system designed for door access control. The system utilizes the ST62 MCU's embedded EEPROM to store a secret code, ensuring data retention even after power loss. The application is developed using the ST6-REALIZER environment, which allows for automatic software generation based on a functional description of the system.

What's inside

• Introduction
• Application Overview
• Functional Description
• Sequencing Control
• Secret Code Storage
• Access Code Entry
• Revision History

Frequently asked questions

What is the purpose of the coded lock system described in the document?

The system is for a door lock that unlocks only if the correct access code is entered.

How many digits can the secret code contain?

The secret code can contain 3 digits.

What type of memory is used to store the secret code?

The secret code is stored in the non-volatile memory (EEPROM) embedded in the ST62 MCU.

What is the name of the development tool used to generate the application software?

The development tool is called the ST6-REALIZER.