AN1496 - APPLICATION NOTE

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1

INTRODUCTION TO ST10 0.35MM EMBEDDED FLASH .........................................

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1.1

DIFFERENCES WITH ST10F168 ...............................................................................

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1.1.1

Single Supply...............................................................................................................

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1.1.2

New Erase/Program Controller....................................................................................

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1.1.3

Improved Granularity of Block Sizes ...........................................................................

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1.2

COMPARISON WITH STAND-ALONE FLASH MEMORIES ......................................

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1.2.1

Similar But Different Erase/Program Commands ........................................................

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1.2.2

Description of the Commands to the Flash Controller .................................................

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1.2.3

Same Flash Status Register ........................................................................................

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1.2.4

Boot Blocks Architecture .............................................................................................

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1.2.5

Protection ....................................................................................................................

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2

WRITING CODE FOR THE FLASH OF ST10 WITH 0.35MM EMBEDDED FLASH..

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2.1

ST10 PROGRAMMING CONSTRAINTS ....................................................................

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2.2

POLLING THE FLASH ERASE PROGRAM CONTROLLER .....................................

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2.2.1

Ready/Busy Signal ......................................................................................................

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2.2.2

Flash Status Register ..................................................................................................

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2.3

FLASH MEMORY MAPPING IN ST10 SPACE ...........................................................

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2.4

PROGRAMMING COMMAND.....................................................................................

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2.5

ERASING COMMAND ................................................................................................

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2.6

FLASH PROTECTION COMMANDS ..........................................................................

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2.6.1

Block Protection...........................................................................................................

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2.6.2

Code Protection ...........................................................................................................

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2.6.2.1

Using Code Protection with ST10................................................................................

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2.6.2.2

Code Protection and Bootstrap Loader .......................................................................

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2.6.2.3

Code Protection and Block0 Protection .......................................................................

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2.7

OTHER FLASH COMMANDS .....................................................................................

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2.8

TIPS TO REDUCE FLASH PROGRAM AND ERASE TIMES ....................................

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2.8.1

Reducing the Programming Time ................................................................................

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2.8.2

Reducing Erase Times ................................................................................................

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3

EMBEDDED APPLICATION ASPECTS.....................................................................

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3.1

READING THE FLASH WHILE ERASING OR PROGRAMMING ..............................

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3.1.1

Minimum Software to be Copied into the On-chip RAM ..............................................

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3.1.2

Maximizing Programming Performance at System Level ............................................

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3.1.3

Suspend and Resume Commands..............................................................................

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3.2

FIELD REPROGRAMMING WITH ST10F269 ............................................................

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3.2.1

Reset ...........................................................................................................................

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3.2.2

List of Events and Suggested Handling Methods ........................................................

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3.2.2.1

Supply out of ST Specification.....................................................................................

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3.2.2.2

ST10 PLL Unlock.........................................................................................................

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3.2.3

Generic Aspects of Flash Field Reprogramming .........................................................

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3.2.3.1

Completion of the Reprogramming Process................................................................

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3.2.3.2

Events That May Interrupt the Reprogramming Process ............................................

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QUICK SUMMARY .....................................................................................................

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CONCLUSION ............................................................................................................

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APPLICATION NOTE VERSION INFORMATION......................................................

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6.1

REVISION OF 26TH OF FEBRUARY 2002 ................................................................

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