W25Q256JVEIQ-TR Datasheet, PDF (37/92 Pages) Winbond – 3V 256M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI

W25Q256JV
8.2.8 Enter 4-Byte Address Mode (B7h)
The Enter 4-Byte Address Mode instruction (Figure 12) will allow 32-bit address (A31-A0) to be used to
access the memory array beyond 128Mb. The Enter 4-Byte Address Mode instruction is entered by driving
/CS low, shifting the instruction code “B7h” into the DI pin and then driving /CS high.
/CS
CLK
Mode 3
Mode 0
DI
(IO₀)
DO
(IO₁)
01234567
Mode 3
Mode 0
Instruction (B7h)
High Impedance
Figure 12. Enter 4-Byte Address Mode instruction
8.2.9 Exit 4-Byte Address Mode (E9h)
In order to be backward compatible, the Exit 4-Byte Address Mode instruction (Figure 13) will only allow
24-bit address (A23-A0) to be used to access the memory array up to 128Mb. The Extended Address
Register must be used to access the memory array beyond 128Mb. The Exit 4-Byte Address Mode
instruction is entered by driving /CS low, shifting the instruction code “E9h” into the DI pin and then driving
/CS high.
/CS
CLK
Mode 3
Mode 0
DI
(IO₀)
DO
(IO₁)
0 1 2 3 4 5 6 7 Mode 3
Mode 0
Instruction (E9h)
High Impedance
Figure 13. Exit 4-Byte Address Mode instruction
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Publication Release Date: September 20, 2016
Revision B