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ST10F271 数据表(PDF) 41 Page - STMicroelectronics |
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ST10F271 数据表(HTML) 41 Page - STMicroelectronics |
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41 / 173 page  ST10F271 Internal Flash memory 41/173 FCR0H |= 0x0100; /*Set SPR in FCR0H*/ FARL = 0xDFB4; /*Load Add of register FNVWPIR in FARL*/ FARH = 0x0008; /*Load Add of register FNVWPIR in FARH*/ FDR0L = 0xFFF0; /*Load Data in FDR0L*/ FDR0H = 0xFFFF; /*Load Data in FDR0H*/ FCR0H |= 0x8000; /*Operation start*/ Example 2: Enable Access and Debug Protection. FCR0H |= 0x0100; /*Set SPR in FCR0H*/ FARL = 0xDFB8; /*Load Add of register FNVAPR0 in FARL*/ FARH = 0x0008; /*Load Add of register FNVAPR0 in FARH*/ FDR0L = 0xFFFC; /*Load Data in FDR0L*/ FCR0H |= 0x8000; /*Operation start*/ Example 3: Disable in a permanent way Access and Debug Protection. XFVTAUR0 = 0x0001; /*Set TAUB in XFVTAUR0*/ FCR0H |= 0x0100; /*Set SPR in FCR0H*/ FARL = 0xDFBC; /*Load Add of register FNVAPR1L in FARL*/ FARH = 0x0008; /*Load Add of register FNVAPR1L in FARH*/ FDR0L = 0xFFFE; /*Load Data in FDR0L for clearing PDS0*/ FCR0H |= 0x8000; /*Operation start*/ Example 4: Enable again in a permanent way Access and Debug Protection, after having disabled them. XFVTAUR0 = 0x0001; /*Set TAUB in XFVTAUR0*/ FCR0H |= 0x0100; /*Set SPR in FCR0H*/ FARL = 0xDFBC; /*Load Add register FNVAPR1H in FARL*/ FARH = 0x0008; /*Load Add register FNVAPR1H in FARH*/ FDR0H = 0xFFFE; /*Load Data in FDR0H for clearing PEN0*/ FCR0H |= 0x8000; /*Operation start*/ XFVTAUR0 = 0x0000; /*Reset TAUB in XFVTAUR0*/ 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. 5.7 Write operation summary In general, each write operation is started through a sequence of 3 steps: 1. The first instruction is used to select the desired operation by setting its corresponding selection bit in the Flash Control Register 0. 2. The second step is the definition of the Address and Data for programming or the Sectors or Banks to erase. 3. The last instruction is used to start the write operation, by setting the start bit WMS in the FCR0. Once selected, but not yet started, one operation can be canceled by resetting the operation selection bit. A summary of the available Flash Module Write Operations are shown in the following Table 24: Flash write operations. |
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