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M25P20 Fiches technique(PDF) 18 Page - STMicroelectronics

No de pièce M25P20
Description  2 Mbit, Low Voltage, Serial Flash Memory With 40MHz SPI Bus Interface
PDF  50 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25P20 Fiches technique(HTML) 18 Page - STMicroelectronics

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Instructions
M25P20
18/50
6.2
Write Disable (WRDI)
The Write Disable (WRDI) instruction (Figure 8) resets the Write Enable Latch (WEL) bit.
The Write Disable (WRDI) instruction is entered by driving Chip Select (S) Low, sending the
instruction code, and then driving Chip Select (S) High.
The Write Enable Latch (WEL) bit is reset under the following conditions:
●
Power-up
●
Write Disable (WRDI) instruction completion
●
Write Status Register (WRSR) instruction completion
●
Page Program (PP) instruction completion
●
Sector Erase (SE) instruction completion
●
Bulk Erase (BE) instruction completion
Figure 8.
Write Disable (WRDI) Instruction Sequence
C
D
AI03750D
S
Q
2
1
34567
High Impedance
0
Instruction



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