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M950X0-W Fiches technique(PDF) 18 Page - STMicroelectronics

No de pièce M950X0-W
Description  Compatible with SPI bus serial interface
PDF  46 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M950X0-W Fiches technique(HTML) 18 Page - STMicroelectronics

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Instructions
M950x0-W M950x0-R M950x0-DF
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DocID6512 Rev 13
6.2
Write Disable (WRDI)
One way of resetting the Write Enable Latch (WEL) bit is to send a Write Disable instruction
to the device. As shown in Figure 8: Write Disable (WRDI) sequence, to send this instruction
to the device, Chip Select (S) is driven low, and the bits of the instruction byte are shifted in,
on Serial Data Input (D). The device then enters a wait state. It waits for a the device to be
deselected, by Chip Select (S) being driven high.
The Write Enable Latch (WEL) bit is reset by any of the following events:
•
Power-up
•
WRDI instruction execution
•
WRSR instruction completion
•
WRITE instruction completion
•
Write Protect (W) line being held low.
Figure 8. Write Disable (WRDI) sequence



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