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M95P16-IXCS/EF Datasheet(PDF) 38 Page - STMicroelectronics

Part # M95P16-IXCS/EF
Description  Ultra low power 16 Mbit serial SPI page EEPROM with dual and quad outputs
PDF  63 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M95P16-IXCS/EF Datasheet(HTML) 38 Page - STMicroelectronics

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6.20
Read SFDP (5Ah)
The Read SFDP (RDSFDP) instruction is used to read the SFDP register format.
This instruction is initiated by driving the S pin low and shifting the instruction code 5Ah, followed first by a 24-bit
address (A23-A0) into the D pin, then by eight additional dummy clock cycles. The code and address bits are
latched on the rising edge of the C pin. After the eight dummy clocks are received, the data byte of the SFDP
register is shifted out (MSB first) on the Q pin, on the falling edge of C. The address is automatically incremented
to the next higher address after each data byte is shifted out, thus enabling a continuous stream of data. This
means that the whole SFDP register (512 bytes) can be accessed with a single instruction, as long as the clock
continues to cycle. The instruction is completed by driving S high. During the dummy clock cycles the data value
on the D pin is Don't care and the Q pin is high-Z.
The read SFDP sequence is shown in Figure 30.
Figure 30. Read SFDP
0
1
2
3
4
5
6
7
8
9
10
11
29
30
31
C
D
A23 A22 A21
A2
A1
A0
Q
High impedance
S
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
High impedance
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
C
D
Q
S
RDSFDP instruction
24-bit address
Data out 1
Data out 2
Dummy
MS69280V1
M95P16-I M95P16-E
Read SFDP (5Ah)
DS13710 - Rev 1
page 38/63



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