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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT25DF641A датащи(PDF) 27 Page - Dialog Semiconductor |
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AT25DF641A датащи(HTML) 27 Page - Dialog Semiconductor |
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27 / 58 page  26 AT25DF641A [DATASHEET] 8793F–DFLASH–11/2017 Table 9-2. Valid SPRL and Global Protect/Unprotect Conditions WP State Current SPRL Value New Write Status Register Byte 1 Data Protection Operation New SPRL Value Bit 7 6 5 4 3 2 1 0 0 0 0 x 0 0 0 0 x x 0 x 0 0 0 1 x x 0 x 1 1 1 0 x x 0 x 1 1 1 1 x x 1 x 0 0 0 0 x x 1 x 0 0 0 1 x x 1 x 1 1 1 0 x x 1 x 1 1 1 1 x x Global Unprotect – all Sector Protection Registers reset to 0. No change to current protection. No change to current protection. No change to current protection. Global Protect – all Sector Protection Registers set to 1. Global Unprotect – all Sector Protection Registers reset to 0. No change to current protection. No change to current protection. No change to current protection. Global Protect – all Sector Protection Registers set to 1. 0 0 0 0 0 1 1 1 1 1 0 1 x x x x x x x x No change to the current protection level. All sectors currently protected will remain protected and all sectors currently unprotected will remain unprotected. The Sector Protection Registers are hard-locked and cannot be changed when the WP pin is LOW and the current state of SPRL is 1. Therefore, a Global Protect/Unprotect will not occur. In addition, the SPRL bit cannot be changed (the WP pin must be High in order to change SPRL back to a 0). 1 0 0 x 0 0 0 0 x x 0 x 0 0 0 1 x x 0 x 1 1 1 0 x x 0 x 1 1 1 1 x x 1 x 0 0 0 0 x x 1 x 0 0 0 1 x x 1 x 1 1 1 0 x x 1 x 1 1 1 1 x x Global Unprotect – all Sector Protection Registers reset to 0. No change to current protection. No change to current protection. No change to current protection. Global Protect – all Sector Protection Registers set to 1. Global Unprotect – all Sector Protection Registers reset to 0. No change to current protection. No change to current protection. No change to current protection. Global Protect – all Sector Protection Registers set to 1. 0 0 0 0 0 1 1 1 1 1 1 1 0 x 0 0 0 0 x x 0 x 0 0 0 1 x x 0 x 1 1 1 0 x x 0 x 1 1 1 1 x x 1 x 0 0 0 0 x x 1 x 0 0 0 1 x x 1 x 1 1 1 0 x x 1 x 1 1 1 1 x x No change to the current protection level. All sectors currently protected will remain protected, and all sectors currently unprotected will remain unprotected. The Sector Protection Registers are soft-locked and cannot be changed when the current state of SPRL is 1. Therefore, a Global Protect/Unprotect will not occur. However, the SPRL bit can be changed back to a 0 from a 1 since the WP pin is High. To perform a Global Protect/Unprotect, the Write Status Register command must be issued again after the SPRL bit has been changed from 1 to 0. 0 0 0 0 0 1 1 1 1 1 |
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