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W25Q32FVZPIP Datasheet(PDF) 76 Page - Winbond |
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W25Q32FVZPIP Datasheet(HTML) 76 Page - Winbond |
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76 / 99 page  W25Q32FV - 75 - 8.2.38 Individual Block/Sector Lock (36h) The Individual Block/Sector Lock provides an alternative way to protect the memory array from adverse Erase/Program. In order to use the Individual Block/Sector Locks, the WPS bit in Status Register-3 must be set to 1. If WPS=0, the write protection will be determined by the combination of CMP, SEC, TB, BP[2:0] bits in the Status Registers. The Individual Block/Sector Lock bits are volatile bits. The default values after device power up or after a Reset are 1, so the entire memory array is being protected. To lock a specific block or sector as illustrated in Figure 4d, an Individual Block/Sector Lock command must be issued by driving /CS low, shifting the instruction code “36h” into the Data Input (DI) pin on the rising edge of CLK, followed by a 24-bit address and then driving /CS high. A Write Enable instruction must be executed before the device will accept the Individual Block/Sector Lock Instruction (Status Register bit WEL= 1). Figure 52a. Individual Block/Sector Lock Instruction (SPI Mode) Figure 52b. Individual Block/Sector Lock Instruction (QPI Mode) |
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