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M25P20 データシート(PDF) 18 Page - STMicroelectronics

部品番号 M25P20
部品情報  2 Mbit, Low Voltage, Serial Flash Memory With 40MHz SPI Bus Interface
PDF  50 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25P20 データシート(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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