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ST10F272M Folha de dados(PDF) 36 Page - STMicroelectronics |
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ST10F272M Folha de dados(HTML) 36 Page - STMicroelectronics |
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36 / 175 page ![]() Internal Flash memory ST10F272M 36/176 5.5.3 Flash non-volatile access protection register 0 (FNVAPR0) 5.5.4 Flash non-volatile access protection register 1 low (FNVAPR1L) Table 19. Flash non-volatile write protection I register Bit Name Function 7:0 W0P[7:0] Write Protection Bank 0 / Sectors 7-0 (IFlash) These bits, if programmed at 0, disable any write access to the sectors of Bank 0 (IFlash) FNVAPR0 (0x08 DFB8) NVR Delivery value: ACFFh 15 14 13 12 11 10 987 65432 10 Reserved DBGP ACCP -RW RW Table 20. Flash non-volatile access protection register 0 Bit Name Function 0ACCP Access Protection This bit, if programmed at 0, disables any access (read/write) to data mapped inside IFlash Module address space, unless the current instruction is fetched from IFlash. 1DBGP Debug Protection This bit, if erased at 1, can be used to by-pass all the protections using the Debug features through the Test Interface. If programmed at 0, on the contrary, all the debug features, the Test Interface and all the Flash Test modes are disabled. Even STMicroelectronics will not be able to access the device to run any eventual failure analysis. FNVAPR1L (0x08 DFBC) NVR Delivery value: FFFFh 15 14 13 12 11 10 987 65432 10 PDS15 PDS14 PDS13 PDS12 PDS11 PDS10 PDS9 PDS8 PDS7 PDS6 PDS5 PDS4 PDS3 PDS2 PDS1 PDS0 RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Table 21. Flash non-volatile access protection register 1 low Bit Name Function 15:0 PDS[15:0] Protections Disable 15-0 If bit PDSx is programmed at 0 and bit PENx is erased at 1, the action of bit ACCP is disabled. Bit PDS0 can be programmed at 0 only if both bits DBGP and ACCP have already been programmed at 0. Bit PDSx can be programmed at 0 only if bit PENx-1 has already been programmed at 0. |
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