N25Q064A13EF640F Micron Technology Inc, N25Q064A13EF640F Datasheet - Page 81

• Manufacturer Part Number: N25Q064A13EF640F
• Manufacturer: Micron Technology Inc

Specifications of N25Q064A13EF640F

• Lead Free Status / Rohs Status: Supplier Unconfirmed

N25Q064 - 3 V
Table 19.
1. Values of (b1, b0) after power-up are defined in
9.1.26
b7-b2
Bit
b1
b0
DQ0
DQ1
*Address bit A23 is “Don’t Care. ”
C
S
Sector Lock
Write Lock
Bit name
Sector
Down
Figure 33. Read Lock Register instruction and data-out sequence
Lock Register out
Write to Lock Register (WRLR)
The Write to Lock Register (WRLR) instruction allows bits to be changed in the Lock
Registers. Before it can be accepted, a Write Enable (WREN) instruction must previously
have been executed. After the Write Enable (WREN) instruction has been decoded, the
device sets the Write Enable Latch (WEL).
The Write to Lock Register (WRLR) instruction is entered by driving Chip Select (S) Low,
followed by the instruction code, three address bytes (pointing to any address in the
targeted sector and one data byte on Serial Data input (DQ0). The instruction sequence is
shown in Figure 22. Chip Select (S) must be driven High after the eighth bit of the data byte
has been latched in, otherwise the Write to Lock Register (WRLR) instruction is not
executed.
Lock Register bits are volatile, and therefore do not require time to be written. When the
Write to Lock Register (WRLR) instruction has been successfully executed, the Write
Enable Latch (WEL) bit is reset after a delay time less than tSHSL minimum value.
Any Write to Lock Register (WRLR) instruction, while an Erase, Program or Write cycle is in
progress, is rejected without having any effects on the cycle that is in progress.
0
1
High Impedance
Value
‘1’
‘0’
‘1’
‘0’
2
Instruction
3
The Write Lock and Lock Down bits cannot be changed. Once a ‘1’ is written to the
Lock Down bit it cannot be cleared to ‘0’, except by a power-up.
The Write Lock and Lock Down bits can be changed by writing new values to them.
Write, Program and Erase operations in this sector will not be executed. The
memory contents will not be changed.
Write, Program and Erase operations in this sector are executed and will modify the
sector contents.
4
(1)
5
6
7
MSB
23
Section 7: Protection
8
22 21
9 10
24-bit address*
Reserved
Micron Technology, Inc., reserves the right to change products or specifications without notice.
3
28 29 30 31 32 33 34 35
2
modes.
1
Function
0
MSB
7
6
Lock Register Out
5
4
©2010 Micron Technology, Inc. All rights reserved.
3
36 37 38
2
1
0
39
Instructions
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