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ST10F273Z4 Datasheet(PDF) 42 Page - STMicroelectronics |
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ST10F273Z4 Datasheet(HTML) 42 Page - STMicroelectronics |
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42 / 188 page  Internal Flash memory ST10F273Z4 42/188 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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