N25Q256A13EF840F Datasheet, PDF (68/90 Pages) Micron Technology – Micron Serial NOR Flash Memory

3V, 256Mb: Multiple I/O Serial Flash Memory
ADDRESS MODE Operations – Enter and Exit 4-Byte Address
Mode
ADDRESS MODE Operations – Enter and Exit 4-Byte Address Mode
ENTER or EXIT 4-BYTE ADDRESS MODE Command
Both ENTER 4-BYTE ADDRESS MODE and EXIT 4-BYTE ADDRESS MODE commands
share the same requirements.
To enter or exit the 4-byte address mode, the WRITE ENABLE command must be execu-
ted to set the write enable latch bit to 1. (Note: The WRITE ENABLE command must
NOT be executed on the N25Q256A83ESF40x and N25Q256A83E1240x devices.) S# must
be driven LOW. The command must be input on DQn. The effect of the command is im-
mediate; after the command has been executed, the write enable latch bit is cleared to
0.
The default address mode is three bytes, and the device returns to the default upon exit-
ing the 4-byte address mode.
ENTER or EXIT QUAD Command
The ENTER or EXIT QUAD (QPI) command is only available on the N25Q256A83ESF40x
and N25Q256A83E1240x devices. To initiate this command, the WRITE ENABLE com-
mand must not be executed. S# must be driven LOW, and the command must be input
on DQn. The effect of the command is immediate.
PDF: 09005aef84566603
n25q_256mb_65nm.pdf - Rev. O 12/12 EN
68
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2011 Micron Technology, Inc. All rights reserved.