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M25P64-VMF6TP 데이터시트(PDF) 27 Page - STMicroelectronics

부품명 M25P64-VMF6TP
상세설명  64 Mbit, Low Voltage, Serial Flash Memory With 50MHz SPI Bus Interface
PDF  49 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M25P64-VMF6TP 데이터시트(HTML) 27 Page - STMicroelectronics

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6.4.4
SRWD bit
The Status Register Write Disable (SRWD) bit is operated in conjunction with the Write
Protect (W/VPP) signal. The Status Register Write Disable (SRWD) bit and Write Protect
(W/VPP) signal allow the device to be put in the Hardware Protected mode (when the Status
Register Write Disable (SRWD) bit is set to 1, and Write Protect (W/VPP) is driven Low). In
this mode, the non-volatile bits of the Status Register (SRWD, BP2, BP1, BP0) become
read-only bits and the Write Status Register (WRSR) instruction is no longer accepted for
execution.
Figure 11.
Read Status Register (RDSR) instruction sequence and data-out
sequence
C
D
S
2
1
3456789 10 11 12 13 14 15
Instruction
0
AI02031E
Q
7
6543210
Status Register Out
High Impedance
MSB
7
6543210
Status Register Out
MSB
7



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