W25Q256FVBIF-TR Datasheet, PDF (56/108 Pages) Winbond – 3V 256M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI

W25Q256FV
8.2.21 Fast Read Quad I/O with 4-Byte Address (ECh)
The Fast Read Quad 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 Quad I/O with 4-Byte Address instruction will
always require 32-bit address to access the entire 256Mb memory.
The Fast Read Quad I/O with 4-Byte Address (ECh) instruction is only supported in Standard SPI mode.
/CS
CLK
Mode 3
Mode 0
IO0
IO1
IO2
IO3
0123456789
14 15 16 17 18 19 20 21 22 23 24 25
Instruction (ECh)
32-Bit Address
M7-0 Dummy Dummy
IOs switch from
Input to Output
28 24
4040
40404
29 25
5151
51515
30 26
6262
62626
31 27
7373
73
Byte 1
73
Byte 2
7
Byte 3
Figure 25a. Fast Read Quad I/O with 4-Byte Address Instruction (Initial instruction or previous M5-410, SPI Mode only)
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