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M58PR256LE 数据表(PDF) 65 Page - STMicroelectronics |
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M58PR256LE 数据表(HTML) 65 Page - STMicroelectronics |
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65 / 119 page ![]() M58PR256LE, M58PR512LE, M58PR001LE Block locking 65/119 Table 22. Lock status Current protection status(1) (WP, DQ1, DQ0) 1. The lock status is defined by the write protect pin and by DQ1 (‘1’ for a locked-down block) and DQ0 (‘1’ for a locked block) as read in the Read Electronic Signature command with A1 = VIH and A0 = VIL. Next protection status(1) (WP, DQ1, DQ0) Current state Program/erase allowed After Block Lock command After Block Unlock command After Block Lock-down command After WP transition 1,0,0 yes 1,0,1 1,0,0 1,1,1 0,0,0 1,0,1(2) 2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WP status. no 1,0,1 1,0,0 1,1,1 0,0,1 1,1,0 yes 1,1,1 1,1,0 1,1,1 0,1,1 1,1,1 no 1,1,1 1,1,0 1,1,1 0,1,1 0,0,0 yes 0,0,1 0,0,0 0,1,1 1,0,0 0,0,1(2) no 0,0,1 0,0,0 0,1,1 1,0,1 0,1,1 no 0,1,1 0,1,1 0,1,1 1,1,1 or 1,1,0(3) 3. A WP transition to VIH on a locked block will restore the previous DQ0 value, giving a 111 or 110. |
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