W25Q256FVBIF-TR Datasheet, PDF (51/108 Pages) Winbond – 3V 256M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI

W25Q256FV
8.2.19 Fast Read Dual I/O with 4-Byte Address (BCh)
The Fast Read Dual I/O with 4-Byte Address instruction is similar to the Fast Read Dual I/O instruction
except that it requires 32-bit address instead of 24-bit address. No matter the device is operating in 3-
Byte Address Mode or 4-byte Address Mode, the Fast Read Dual I/O with 4-Byte Address instruction will
always require 32-bit address to access the entire 256Mb memory.
The Fast Read Dual I/O with 4-Byte Address (BCh) instruction is only supported in Standard SPI mode.
/CS
CLK
Mode 3
Mode 0
DI
(IO₀)
0 1 2 3 4 5 6 7 8 9 10
21 22 23 24 25 26 27
Instruction (BCh)
32-Bit Address
M7-0
30 28 26
4206420
DO
(IO₁)
/CS
CLK
DI
(IO₀)
* ^{= MSB}
31 29 27
*
5317531
*
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
IOs switch from
Input to Output
064206420642064206
DO
(IO₁)
175317531753175317
* Byte 1
* Byte 2
* Byte 3
* Byte 4
Figure 23a. Fast Read Dual I/O with 4-Byte Address Instruction (Initial instruction or previous M5-4  10, SPI Mode only)
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Publication Release Date: February 11, 2015
Preliminary – Revision H