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ST72324 QUICK REFERENCE NOTE

2.5 POWERFUL INDUSTRY STANDARD COMMUNICATION INTERFACES

The ST72324 SCI is supported by LIN communication software. LIN is a low cost communica-

tion architecture for local interconnect networks in vehicles. This makes the ST72324 suitable

for use in automotive applications.

Useful Tips:

Using LIN for automotive networks

The software LIN compatible SCI can be used in automotive

application for connecting various intelligent mechatronical systems.

For more information how to use LIN refer to:

AN1278: LIN Solutions

SPI is a powerful interface for communicating with on-board components with very little CPU

overhead.

Useful Tips:

Software SS management for SPI

The application can choose to manage the Slave Select signal by

software. This will free one I/O line for application usage

2.6 IN-CIRCUIT PROGRAMMING AND IN-APPLICATION PROGRAMMING

In addition to using a socket-type programming tool, the following two modes allow you to pro-

gram the ST72324 without removing it from the application board.

ICP: In-Circuit-Programming: ICP is the ability to program the Flash memory (All Flash sectors

and the option byte row) of a microcontroller using the ICC (In-Circuit Communication) pro-

tocol after the device has been plugged into the board, but not while the application is running.

IAP: In-Application-Programming: IAP is the ability to re-program the Flash memory (Option

Bytes and All Flash sectors except Sector 0) of a microcontroller while the device is plugged

into the application and the application is running. As sector 0 contains the software driver that

does the re-programming, it is write protected and therefore is not re-programmable. You

have to initially program the software driver in sector 0 using ICP.

Useful Tips:

Using In-Application Programming

Applications can use In-Application Programming as a very flexible

way of programming the ST72324.

For more information on how to use IAP refer to:

AN1576: In-Application programming drivers for ST7 HDFlash or

XFlash MCUs