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W25Q16JVSSIQ Datasheet(PDF) 32 Page - Winbond

Part # W25Q16JVSSIQ
Description  3V 16M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W25Q16JVSSIQ Datasheet(HTML) 32 Page - Winbond

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W25Q16JV
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Fast Read Quad I/O (EBh)
The Fast Read Quad I/O (EBh) instruction is similar to the Fast Read Dual I/O (BBh) instruction except that
address and data bits are input and output through four pins IO0, IO1, IO2 and IO3 and four Dummy clocks
are required in SPI mode prior to the data output. The Quad I/O dramatically reduces instruction overhead
allowing faster random access for code execution (XIP) directly from the Quad SPI. The Quad Enable bit
(QE) of Status Register-2 must be set to enable the Fast Read Quad I/O Instruction.
Figure 24a. Fast Read Quad I/O Instruction (M7-M0 should be set to Fxh)
Fast Read Quad I/O with “8/16/32/64-Byte Wrap Around”
The Fast Read Quad I/O instruction can also be used to access a specific portion within a page by issuing
a “Set Burst with Wrap” (77h) command prior to EBh. The “Set Burst with Wrap” (77h) command can either
enable or disable the “Wrap Around” feature for the following EBh commands. When “Wrap Around” is
enabled, the data being accessed can be limited to either an 8, 16, 32 or 64-byte section of a 256-byte
page. The output data starts at the initial address specified in the instruction, once it reaches the ending
boundary of the 8/16/32/64-byte section, the output will wrap around to the beginning boundary
automatically until /CS is pulled high to terminate the command.
The Burst with Wrap feature allows applications that use cache to quickly fetch a critical address and then
fill the cache afterwards within a fixed length (8/16/32/64-byte) of data without issuing multiple read
commands.
The “Set Burst with Wrap” instruction allows three “Wrap Bits”, W6-4 to be set. The W4 bit is used to enable
or disable the “Wrap Around” operation while W6-5 are used to specify the length of the wrap around section
within a page. Refer to section 8.2.37 for detail descriptions.
M7-0
/CS
CLK
Mode 0
Mode 3
0
1
IO
0
IO
1
IO
2
IO
3
2
3
4
5
20
16
12
8
21
17
22
18
23
19
13
9
14
10
15
11
A23-16
6
7
8
9
4
0
5
1
6
2
7
3
A15-8
A7-0
Byte 1
Byte 2
4
0
5
1
6
2
7
3
4
0
5
1
6
2
7
3
4
0
5
1
6
2
7
3
10
11
12
13
14
4
5
6
7
IOs switch from
Input to Output
Byte 3
15
16
17
18
19
20
21
22
23
Dummy
Dummy
Instruction (EBh)


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