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ST10F273E Datasheet(PDF) 42 Page - STMicroelectronics

Part # ST10F273E
Description  16-bit MCU with 512 Kbyte Flash memory and 36 Kbyte RAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F273E Datasheet(HTML) 42 Page - STMicroelectronics

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Internal Flash memory
ST10F273E
42/179
Set Protection
Example 1: Enable Write Protection of sectors B0F3-0 of Bank 0.
FCR0H
|= 0x0100;
/*Set SPR in FCR0H*/
FARL
= 0xDFB4;
/*Load Add of register FNVWPIR in FARL*/
FARH
= 0x000E;
/*Load Add of register FNVWPIR in FARH*/
FDR0L
= 0xFFF0;
/*Load Data in FDR0L*/
FDR0H
= 0xFFFF;
/*Load Data in FDR0H*/
FCR0H
|= 0x8000;
/*Operation start*/
Notice that SMOD bit of FCR0H must NOT be set.
Example 2: Enable Access and Debug Protection.
FCR0H
|= 0x0100;
/*Set SPR in FCR0H*/
FARL
= 0xDFB8;
/*Load Add of register FNVAPR0 in FARL*/
FARH
= 0x000E;
/*Load Add of register FNVAPR0 in FARH*/
FDR0L
= 0xFFFC;
/*Load Data in FDR0L*/
FCR0H
|= 0x8000;
/*Operation start*/
Notice that SMOD bit of FCR0H must NOT be set.
Example 3: Disable in a permanent way Access and Debug Protection.
FCR0H
|= 0x0100;
/*Set SPR in FCR0H*/
FARL
= 0xDFBC;
/*Load Add of register FNVAPR1L in FARL*/
FARH
= 0x000E;
/*Load Add of register FNVAPR1L in FARH*/
FDR0L
= 0xFFFE;
/*Load Data in FDR0L for clearing PDS0*/
FCR0H
|= 0x8000;
/*Operation start*/
Notice that SMOD bit of FCR0H must NOT be set.
Example 4: Enable again in a permanent way Access and Debug Protection, after having
disabled them.
FCR0H
|= 0x0100;
/*Set SPR in FCR0H*/
FARL
= 0xDFBC;
/*Load Add register FNVAPR1H in FARL*/
FARH
= 0x000E;
/*Load Add register FNVAPR1H in FARH*/
FDR0H
= 0xFFFE;
/*Load Data in FDR0H for clearing
PEN0*/
FCR0H
|= 0x8000;
/*Operation start*/
Notice that SMOD bit of FCR0H must NOT be set.
Disable and re-enable of Access and Debug Protection in a permanent way (as shown by
examples 3 and 4) can be done for a maximum of 16 times.


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