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25X40BLSIG

1M-BIT, 2M-BIT AND 4M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

Winbond 

W25X10BL/20BL/40BL

9.2.9 Fast Read (0Bh)

The Fast Read instruction is similar to the Read Data instruction except that it can operate at the

highest possible frequency of FR (see AC Electrical Characteristics). This is accomplished by adding

eight “dummy” clocks after the 24-bit address as shown in figure 10. The dummy clocks allow the

devices internal circuits additional time for setting up the initial address. During the dummy clocks the

data value on the DIO pin is a “don’t care”.

Figure 10. Fast Read Instruction Sequence Diagram

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