STMicroelectronics AN1796 Application Note Field Updates for Flash Based ST7 Applications Using a PC Comm Port

This document presents practical software techniques for updating Flash-based ST7 MCUs using an RS232 serial port and a standard S-Records format file. The software is a small (less than 500 bytes) boot loader that allows for safe and reliable replacement of the operating software in the ST7.

Brand: STMicroelectronics
Category: microcontrollers
Document type: Application Note
Language: English
Pages: 17
File format: PDF
File size: 143 KB
Published: 07 August, 2012
Updated: 29 September, 2023
Model: ST7
MD5 checksum: 865D75FE2CDCD5AC9372BB0E8BD2F56D
PDF: STMicroelectronics AN1796 Application Note Field Updates for Flash Based ST7 Applications Using a PC Comm Port PDF

About this manual

The document presents practical software techniques for updating flash-based ST7 microcontrollers (MCUs) while they remain in-circuit. It details a small boot loader program that allows users to replace operating software safely and reliably by uploading an S-Records format file via a standard serial port connection to a PC.

What's inside

Introduction
Flash Memory Sectors
Absolute Addresses and Vectors
Using the Program with HyperTerminal

Frequently asked questions

What is the maximum size of the boot loader program described in this note?

The boot loader program is less than 500 bytes in size.

What is the minimum size for sector0 when programming the ST72264?

The smallest size for sector0 is 0.5K or 512 bytes.

What baud rate and data settings must be configured in HyperTerminal for this update?

Configure the connection to 9600 bits per second with 8 data bits, no parity, and 1 stop bit.

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