w25x32a Winbond Electronics Corp America, w25x32a Datasheet - Page 17

• Manufacturer Part Number: w25x32a
• Description: 32m-bit Serial Flash Memory With 4kb Sectors And Dual Output Spi
• Manufacturer: Winbond Electronics Corp America

W25X32A
11.2.3 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 “06h” into the Data Input (DI) pin on the rising edge of CLK, and then driving /CS high.
Figure 4. Write Enable Instruction Sequence Diagram
11.2.4 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 “04h” 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
Publication Release Date: August 24, 2008
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Preliminary - Revision A