n25q064 Numonyx, n25q064 Datasheet - Page 59

• Manufacturer Part Number: n25q064
• Description: 64mb 1.8v, Multiple I/o, 4kb Subsector Erase, Xip Enabled, Serial Flash Memory With 108 Mhz Spi Bus Interface
• Manufacturer: Numonyx

N25Q064 - 1.8V
9.1.4
Note:
DQ0
DQ1
S
C
DQ0
DQ1
*Address bit A23 is “Don’t Care. ”
S
C
Figure 12. Read Data Bytes at Higher Speed instruction and data-out sequence
Read Serial Flash Discovery Parameter
The Read Serial Flash Discovery Parameter (RDSFDP) instruction allows reading the Serial
Flash Discovery Parameter area (SFDP).
This SFDP area is composed of 2048 read-only bytes containing operating characteristics
and vendor specific information. The SFDP area is factory programmed.
Data to be written to the SFDP area is in definition phase.
If the SFDP area is blank, the device is shipped with all the SFDP bytes at FFh. If only a
portion of the SFDP area is written to, the portion not used is shipped with bytes in erased
state (FFh).
The instruction sequence for RDSFDP has the same structure as that of a Fast Read
instruction. First, the device is selected by driving Chip Select (S) Low. Next, the 8-bit
instruction code (5Ah) and the 24-bit address are shifted in, followed by 8 dummy clock
cycles.
The bytes of SFDP content are shifted out on the Serial Data Output (DQ1) starting from the
specified address. Each bit is shifted out during the falling edge of Serial Clock (C).
The Read SFDP instruction is terminated by driving Chip Select (S) High at any time during
data output.
7
0
32 33 34
6
1
High Impedance
Dummy cycles
5
2
Instruction
4
3
35
3
4
36 37 38 39 40 41 42 43 44 45 46
2
5
1
6
0
7
23
MSB
7
8
22 21
6
9 10
24-bit address*
5
DATA OUT 1
4
Micron Technology, Inc., reserves the right to change products or specifications without notice.
3
28 29 30 31
3
2
2
1
1
0
0
47
MSB
7
6
5
DATA OUT 2
4
©2010 Micron Technology, Inc. All rights reserved.
3
2
1
0
MSB
7
Instructions
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