n25q256 Numonyx, n25q256 Datasheet - Page 25

• Manufacturer Part Number: n25q256
• Description: 256-mbit 3 V, Multiple I/o, 4-kbyte Subsector Erase, Xip Enabled, Serial Flash Memory With 108 Mhz Spi Bus Interface
• Manufacturer: Numonyx

N25Q256 - 3 V
5.1.2
4 Byte Address Mode
In 4-byte address mode all instructions requiring an address must be issued with 4 address
byte. Two dedicated instructions are available to enter/exit this modality:
In this modality EAR<0> becomes 'don't care'
When 4-byte address mode is enabled, all instructions requiring address must be issued
with 4 address byte. The figures below show a typical read instruction using the Extended
SPI protocol and a 4-byte address.
Figure 8.
Figure 9.
DQ0
DQ1
S#
DQ0
DQ1
C
S#
C
Enter 4-byte address mode (EN4BYTEADDR)
Exit 4-byte address mode (EX4BYTEADDR)
0
0
1
1
4-Byte Address on One Wire, Extended SPI
4-Byte Address on Two Wires, Extended SPI
2
Instruction
2
Instruction
3
Don’t Care
3
4
4
5
5
6
7
6
4th Byte Address
31 30
8
7
4th Byte Address
31 29 27 25
30 28 26 24 22 20
9
8
9
24 23 22
15 16 17
10 11 12 13
Micron Technology, Inc., reserves the right to change products or specifications without notice.
24-Bit Address
23 21
24-Bit Address
38 39
2
0
22 23
2
3
40
0
1
D
©2010 Micron Technology, Inc. All rights reserved.
Operating features
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