W25Q32FWTBIQ View Datasheet(PDF) - Winbond

Part Name

Description

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W25Q32FWTBIQ

1.8V 32M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI

Winbond 

W25Q32FW

/CS

CLK

Mode 3

Mode 0

IO0

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

A23-16 A15-8

A7-0

M7-0 Dummy Dummy

IOs switch from

Input to Output

20 16 12 8 4 0 4 0

40404

IO1

21 17 13 9 5 1 5 1

51515

IO2

22 18 14 10 6 2 6 2

62626

IO3

23 19 15 11 7 3 7 3

73

Byte 1

73

Byte 2

7

Byte 3

Figure 24b. Fast Read Quad I/O Instruction (Previous instruction set M5-4 = 10, SPI Mode)

Fast Read Quad I/O with “8/16/32/64-Byte Wrap Around” in Standard 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) 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 8.2.24 for detail descriptions.

- 40 -

Publication Release Date: July 01, 2016

- Revision H

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