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ATXP032 Datasheet(PDF) 50 Page - Dialog Semiconductor |
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ATXP032 Datasheet(HTML) 50 Page - Dialog Semiconductor |
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50 / 113 page  48 ATXP032 DS-ATXP032–114I–4-2020 Performing a global protect or global unprotect operation is accomplished by writing a certain combination of data to the Status/Control register using the Write Status Register command. (See “Write Status Registers (71h)” on page 67 or “Write Status Register Byte 1 (01h)” on page 69 for command execution details) The Write Status Register command is also used to modify the SPRL bit to control hardware and software locking. To perform a global protect operation, the appropriate WP pin and SPRL conditions must be met, and the system must write a logic “1” to bits 5, 4, 3, and 2 of the Status/Control register. Conversely, to perform a global unprotect operation, the same WP and SPRL conditions must be met but the system must write a logic “0” to bits 5, 4, 3, and 2 of the Status/Control register. Table 10-2 details the conditions necessary for a global protect or global unprotect operation to be performed. Table 10-2. Valid SPRL and Global Protect/Unprotect Conditions WP State Current SPRL Value New Write Status Register 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 |
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