AT25SL641-DWF datasheet(30/76 Pages) DIALOG

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AT25SL641

DS-25SL641–113F–12/2018

Figure 7-18. Fast Read Quad I/O Instruction (Initial instruction or previous M7-0 ≠ Axh, SPI mode)

Figure 7-19. Fast Read Quad I/O Instruction (previous M7-0 = Axh, SPI mode)

Wrap Around in SPI mode

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) instruction prior to issuing the Fast Read Quad I/O (EBh) instruction. The Set Burst with Wrap (77h)

instruction can either enable or disable the Wrap Around feature for the following Fast Read Quad I/O instruction.

When Wrap Around is enabled, the data being accessed can be limited to an 8/16/32/64-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 wraps around to the beginning boundary automatically until CS is pulled high to

terminate the instruction.

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 instructions. (Please

refer to Section 7.32 Set Burst with Wrap).

AT25SL641-DWF Datasheet(PDF) 30 Page - Dialog Semiconductor