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M58MR032C Datasheet(PDF) 15 Page - STMicroelectronics |
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M58MR032C Datasheet(HTML) 15 Page - STMicroelectronics |
15 / 52 page 15/52 M58MR032C, M58MR032D Table 13. Protection States (1) Note: 1. All blocks are protected at power-up, so the default configuration is 001 or 101 according to WP status. 2. Current state and Next state gives the protection status of a block. The protection status is defined by the write protect in and by DQ1 (= 1 for a locked block) and DQ0 (= 1 for a protected block) as read in the Read Electronic Signature instruction with A1 = VIH and A0 = VIL. 3. Next state is the protection status of a block after a Protect or Unprotect or Lock command has been issued or after WP has changed its logic value. 4. A WP transition to VIH on a locked block will restore the previous DQ0 value, giving a 111 or 110. Current State (2) (WP, DQ1, DQ0) Program/Erase Allowed Next State After Event (3) Protect Unprotect Lock WP transition 100 Yes 101 100 111 000 101 No 101 100 111 001 110 Yes 111 110 111 011 111 No 111 110 111 011 000 Yes 001 000 011 100 001 No 001 000 011 101 011 No 011 011 011 111 or 110 (4) Figure 5. Security Block Memory Map AI90023 Parameter Block # 0 User Programmable OTP Unique device number Protection Register Lock 2 1 0 88h 85h 84h 81h 80h |
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