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S25FS256S Datasheet(PDF) 93 Page - SPANSION

Part # S25FS256S
Description  MirrorBit Flash Non-Volatile Memory
PDF  154 Pages
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Manufacturer  SPANSION [SPANSION]
Direct Link  http://www.spansion.com
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S25FS256S Datasheet(HTML) 93 Page - SPANSION

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November 6, 2013 S25FS-S_00_04
S25FS-S Family
93
Da ta
Shee t
(Prelim i nar y )
10.2.3
Read Serial Flash Discoverable Parameters (RSFDP 5Ah)
The command is initiated by shifting on SI the instruction code “5Ah”, followed by a 24-bit address of
000000h, followed by 8 dummy cycles. The SFDP bytes are then shifted out on SO starting at the falling edge
of SCK after the dummy cycles. The SFDP bytes are always shifted out with the MSB first. If the 24-bit
address is set to any other value, the selected location in the SFDP space is the starting point of the data
read. This enables random access to any parameter in the SFDP space. The RSFDP command is supported
up to 50 MHz.
Figure 10.4 RSFDP Command Sequence
This command is also supported in QPI Mode. In QPI Mode the instruction is shifted in on IO0-IO3 and the
returning data is shifted out on IO0-IO3.
Figure 10.5 RSFDP QPI Mode Command Sequence
CS#
SCK
SI
SO
Phase
7
6
5
4
3
2
1
0
23
1
0
7
6
5
4
3
2
1
0
Instruction
Address
Dummy Cycles
Data1
CS#
SCLK
IO0
IO1
IO2
IO3
Phase
4
0
20
4
0
4
0
4
0
4
0
4
0
5
1
21
5
1
5
1
5
1
5
1
5
1
6
2
22
6
2
6
2
6
2
6
2
6
2
7
3
23
7
3
7
3
7
3
7
3
7
3
Instruct.
Address
Dummy
D1
D2
D3
D4



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