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W25X64V Datasheet, PDF (16/44 Pages) Winbond – 64M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI | |||
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W25X64
10.2.3 Write Enable (06h)
The Write Enable instruction (Figure 4) sets the Write Enable Latch (WEL) bit in the Status Register to a
1. The WEL bit must be set prior to every Page Program, Sector Erase, Block Erase, Chip Erase and
Write Status Register instruction. The Write Enable instruction is entered by driving /CS low, shifting the
instruction code â06hâ into the Data Input (DI) pin on the rising edge of CLK, and then driving /CS high.
Figure 4. Write Enable Instruction Sequence Diagram
10.2.4 Write Disable (04h)
The Write Dissable instruction (Figure 5) resets the Write Enable Latch (WEL) bit in the Status Register
to a 0. The Write Disable instruction is entered by driving /CS low, shifting the instruction code â04hâ into
the DIO pin and then driving /CS high. Note that the WEL bit is automatically reset after Power-up and
upon completion of the Write Status Register, Page Program, Sector Erase, Block Erase and Chip
Erase instructions.
Figure 5. Write Disable Instruction Sequence Diagram
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