W25Q32FVZPIP datasheet(77/99 Pages) WINBOND

77 / 99 page

W25Q32FV

Publication Release Date: Sept 16,, 2013

- 76 -

Revision H

8.2.39

Individual Block/Sector Unlock (39h)

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 unlock a specific block or sector as illustrated in Figure 4d, an Individual Block/Sector Unlock

command must be issued by driving /CS low, shifting the instruction code “39h” 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 Unlock Instruction

(Status Register bit WEL= 1).

Figure 53a. Individual Block Unlock Instruction (SPI Mode)

Figure 53b. Individual Block Unlock Instruction (QPI Mode)

W25Q32FVZPIP Datasheet(PDF) 77 Page - Winbond