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PM0020 数据表(PDF) 29 Page - STMicroelectronics |
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PM0020 数据表(HTML) 29 Page - STMicroelectronics |
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29 / 87 page ![]() PM00020 STR91xFA Flash memory 29/87 1.13.3 Protection level 2 register (STR91xFAxx6 and STR91xFAxx7) 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. 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PL2B0S[31:16] rrr rr rr rrr rr rr rr 15 14 13 12 11 10 98 76543 210 PL2B0S[15:0] rrrr rrrr rrrrr rrr Bits 31:0 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 15 14 13 12 11 10 9 876 54 32 10 Reserved LOCK SECURI TY PL2B1S[7:0] rw rrr rr rr rr Bits 15:10 Reserved. Bit 9 LOCK: OTP sector lock bit. See also Section 1.12.8. 0: OTP sector not locked (default) 1: OTP sector locked Bit 8 SECURITY: JTAG Access Security Bit. 0: JTAG access allowed (default) 1: JTAG access not allowed Bits 7:0 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 |
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