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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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PM0020 数据表(PDF) 28 Page - STMicroelectronics |
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PM0020 数据表(HTML) 28 Page - STMicroelectronics |
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28 / 87 page  STR91xFA Flash memory PM00020 28/87 1.13.2 Protection level 2 register (STR91xFAxx2 and STR91xFAxx4) This register can be read using the RSIG command (see Section 1.11.2) or by JTAG. The LOCK bit can be written via CUI or JTAG. Other bits can be written only via JTAG. The factory default settings may be modified by the user via JTAG. The register is not cleared by a device reset. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Reserved LOCK SECURI TY PL2B1S[3:0] PL2B0S[7:0] rw rrr rrrr rrrr rr Bits 15:14 Reserved. Bit 13 LOCK: OTP sector lock bit. See also Section 1.12.8. 0: OTP sector not locked (default) 1: OTP sector locked Bit 12 SECURITY: JTAG Access Security Bit. 0: JTAG access allowed (default) 1: JTAG access not allowed Bits 11:8 PL2B1S[3:0]: Level 2 Protection Status on Bank 1 Sector x. 0: Sector x of Bank 1 is not Level 2 write protected (default) 1: Sector x of Bank 1 is Level 2 write protected Bits 7:0 PL2B0S[7:0]: Level 2 Protection Status on Bank 0 Sector x. 0: Sector x of Bank 0 is not Level 2 write protected (default) 1: Sector x of Bank 0 is Level 2 write protected |
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