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M95M01-DF bảng dữ liệu(PDF) 29 Page - STMicroelectronics

tên linh kiện M95M01-DF
Giải thích chi tiết về linh kiện  1-Mbit serial SPI bus EEPROM
PDF  51 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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M95M01-DF bảng dữ liệu(HTML) 29 Page - STMicroelectronics

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M95M01-DF M95M01-R
Instructions
37
6.9
Read Lock Status (available only in M95M01-D devices)
The Read Lock Status instruction (see Table 3) is used to check whether the Identification
Page is locked or not in Read-only mode. The Read Lock Status sequence is defined with
the Chip Select (S) first driven low. The bits of the instruction byte and address bytes are
then shifted in on Serial Data Input (D). Address bit A10 must be 1, all other address bits are
Don't Care. The Lock bit is the LSB (least significant bit) of the byte read on Serial Data
Output (Q). It is at “1” when the lock is active and at “0” when the lock is not active. If Chip
Select (S) continues to be driven low, the same data byte is shifted out. The read cycle is
terminated by driving Chip Select (S) high.
The instruction sequence is shown in Figure 17.
Figure 17. Read Lock Status sequence



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