W25Q80BVCIP datasheet(33/74 Pages) WINBOND

33 / 74 page

W25Q128BV

Publication Release Date: October 03, 2013

- 33 -

Revision H

M7-0

/CS

CLK

Mode 0

Mode 3

A23-16

A15-8

A7-0

Byte 1

Byte 2

IOs switch from

Input to Output

Byte 3

Dummy

Figure 14b. Fast Read Quad I/O Instruction Sequence (Previous instruction set M5-4 = 10)

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” command prior to EBh. The “Set Burst with Wrap” 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. See 7.2.18 for detail descriptions.

W25Q80BVCIP Datasheet(PDF) 33 Page - Winbond