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STLUX325ATR 데이터시트(PDF) 69 Page - STMicroelectronics |
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STLUX325ATR 데이터시트(HTML) 69 Page - STMicroelectronics |
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69 / 126 page ![]() DocID027870 Rev 1 69/126 STLUX Option bytes 126 10.2 Option byte register description The option byte registers are mapped inside the E²PROM data region. ROP (memory readout protection register) Bit 7 - 0: ROP [7:0] memory readout protection: 0xAA: enable readout protection. When readout protection is enabled, reading or modifying the Flash program memory and DATA area in ICP mode (using the SWIM interface) is forbidden, whatever the write protection settings are. UBC (UBC user boot code register) Bit 7 - 0: UBC [7:0] user boot code write protection memory size: 0x00: no UBC, no Flash memory write-protection 0x01: pages 0 to 1 defined as UBC; 1 Kbyte memory write-protected (0x00.8000- 0x00.83FF) 0x02: pages 0 to 3 defined as UBC; 2 Kbyte memory write-protected (0x00.8000- 0x00.87FF) 0x03: pages 0 to 4 defined as UBC; 2.5 Kbyte memory write-protected (0x00.8000- 0x00.89FF) ... (512 byte every page) 0x3E: pages 0 to 63 defined as UBC; 32 Kbyte memory write-protected (0x00.8000- 0x00.FFFF) Other values: reserved. Table 41. ROP (memory readout protection register) Offset: 0x004800 Default value: 0x00 7 6 5 432 1 0 ROP [7:0] r/w Table 42. UBC (UBC user boot code register) Offset: 0x004801 Default value: 0x00 76 5 4 3 2 1 0 UBC [7:0] r/w |
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