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M95M02-DRMN6TP 데이터시트(PDF) 27 Page - STMicroelectronics

부품명 M95M02-DRMN6TP
상세설명  2-Mbit serial SPI bus EEPROM
PDF  41 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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M95M02-DRMN6TP 데이터시트(HTML) 27 Page - STMicroelectronics

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M95M02-DR
Instructions
6.9
Read Lock Status
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
MS30910V1
C
D
S
Q
2
1
3
4
5
6
7
8
9 10
28 29 30 31 32 33 34 35
3210
36 37 38
76543
1
7
0
High impedance
Data Out 1
Instruction
24-bit address
0
MSB
MSB
2
39
Data Out 2
23 22 21



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