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W25Q32FV

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Fast Read Quad I/O (EBh) in QPI Mode

The Fast Read Quad I/O instruction is also supported in QPI mode, as shown in Figure 19c. When QPI

mode is enabled, the number of dummy clocks is configured by the “Set Read Parameters (C0h)”

instruction to accommodate a wide range of applications with different needs for either maximum Fast

Read frequency or minimum data access latency. Depending on the Read Parameter Bits P[5:4] setting,

the number of dummy clocks can be configured as either 2, 4, 6 or 8. The default number of dummy

clocks upon power up or after a Reset instruction is 2. In QPI mode, the “Continuous Read Mode” bits

M7-0 are also considered as dummy clocks. In the default setting, the data output will follow the

Continuous Read Mode bits immediately.

“Continuous Read Mode” feature is also available in QPI mode for Fast Read Quad I/O instruction.

Please refer to the description on previous pages.

“Wrap Around” feature is not available in QPI mode for Fast Read Quad I/O instruction. To perform a read

operation with fixed data length wrap around in QPI mode, a dedicated “Burst Read with Wrap” (0Ch)

instruction must be used. Please refer to 8.2.45 for details.

Figure 24c. Fast Read Quad I/O Instruction (Initial instruction or previous M5-4

≠10, QPI Mode)

M7-0

/CS

CLK

Mode 0

Mode 3

EBh

A23-16

A15-8

A7-0

Byte 1

Byte 2

IOs switch from

Input to Output

* "Set Read Parameters" instruction (C0h) can

set the number of dummy clocks.

Byte 3

Instruction

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