Rainbow Electronics W25Q32 - Manual (Page 21)

W25Q80, W25Q16, W25Q32
Publication Release Date: June 20, 2007
- 21 - Advanced - Revision A5
10.2.4 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
10.2.5 Write Disable (04h)
The Write Disable 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 DI 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