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M25PE40 データシート(PDF) 22 Page - STMicroelectronics

部品番号 M25PE40
部品情報  4 Mbit, low voltage, Page-Erasable Serial Flash memory with byte alterability, 50 MHz SPI bus, standard pinout
PDF  60 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25PE40 データシート(HTML) 22 Page - STMicroelectronics

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Instructions
M25PE40
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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
●
Page Write (PW) instruction completion
●
Page Program (PP) instruction completion
●
Write Status Register (WRSR) instruction completion
●
Write to Lock Register (WRLR) instruction completion
●
Page Erase (PE) instruction completion
●
SubSector Erase (SSE) 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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