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GD25LE256DYJS データシート(PDF) 18 Page - GigaDevice Semiconductor (Beijing) Inc.

部品番号 GD25LE256DYJS
部品情報  1.8V Uniform Sector Dual and Quad Serial Flash
PDF  83 Pages
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メーカー  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
ホームページ  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25LE256DYJS データシート(HTML) 18 Page - GigaDevice Semiconductor (Beijing) Inc.

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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LE256D
18
7.1.
Enable 4-byte Mode (B7H)
The Enable 4-byte Mode command enables accessing the address length of 32-bit for the memory area of the higher
density (larger than 128Mb). The GD25LE256D default is in 24-bit address mode. After sending the Enable 4-byte Mode
command, the EN4B bit (S11) will be set to 1 to indicate the 4-byte address mode has been enabled. Once the 4-byte
address mode is enabled, the address length becomes 32-bit instead of the default 24 bit. The Disable 4-byte mode or
Reset or Power-off will disable 4-byte mode. In the 4-byte mode, A31-A25 are don
’t care.
Figure2. Enable 4-byte Mode Sequence Diagram
Command
0
1
2
3
4
5
6
7
B7H
CS#
SCLK
SI
Figure2a. Enable 4-byte Mode Sequence Diagram (QPI)
CS#
SCLK
IO0
IO1
IO2
IO3
0
1
Command
B7H



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