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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST10F276E 데이터시트(PDF) 39 Page - STMicroelectronics |
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ST10F276E 데이터시트(HTML) 39 Page - STMicroelectronics |
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39 / 235 page  ST10F276E Internal Flash memory Doc ID 12303 Rev 3 39/235 4.4.6 Flash non-volatile access protection register 0 Due to ST10 architecture, the XFLASH is seen as external memory: this made impossible to access protect it from real external memory or internal RAM. 4.4.7 Flash non-volatile access protection register 1 low FNVAPR0 (0x0E DFB8) NVR Delivery value: ACFFh 15 14 13 12 11 10 98 765 43 210 Reserved DBGP ACCP RW RW Table 23. Flash non-volatile access protection register 0 Bit Function ACCP 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 one of the two Flash modules. DBGP Debug Protection This bit, if erased at 1, allows 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 (0x0E DFBC) NVR Delivery value: FFFFh 15 14 13 12 11 10 98 765 43 210 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 24. Flash non-volatile access protection register 1 low Bit Function 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 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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