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25P40VP Datasheet(PDF) 20 Page - STMicroelectronics

Part # 25P40VP
Description  4 Mbit, low voltage, serial Flash memory with 50 MHz SPI bus interface
PDF  53 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

25P40VP Datasheet(HTML) 20 Page - STMicroelectronics

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Instructions
M25P40
20/53
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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