n25q064 Numonyx, n25q064 Datasheet - Page 136

• 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

Power-up and power-down
11.1
136/154
Table 25.
1. These parameters are characterized only.
Rescue sequence in case of power loss during WRNVCR
If a power loss occurs during a Write Non Volatile Configuration Register instruction, after
the next power on the device could eventually wake up in a not determined state, for
example a not required protocol or XIP mode. In that case a particular rescue sequence
must be used to recover the device at a fixed state (Extended SPI protocol without XIP) until
the next power up. Then to fix the problem definitively is recommended to run the Write Non
Volatile configuration Register again.
The rescue sequence is composed of two parts that have to be run in the correct order.
During all the sequence the TSHSL must be 50ns at least. The sequence is:
DQ0 (PAD DATA) equal to '1' for:
7 clock cycles within S low (S becomes high before 8th clock cycle)
+ 13 clock cycles within S low S becomes high before 14th clock cycle)
+ 25 clock cycles within S low (S becomes high before 26th clock cycle)
To exit from XIP.
DQ0 (PAD DATA) and DQ3 (PAD HOLD) equal to '1' for:
8 clock cycles within S low (S becomes high before 9th clock cycle) to force Normal SPI
protocol.
Symbol
t
t
V
VTW
VTR
WI
(1)
(1)
(1)
V
V
Write inhibit voltage
Power-up timing and V
CC
CC
(min) to Read
(min) to device fully accessible
Parameter
WI
Micron Technology, Inc., reserves the right to change products or specifications without notice.
threshold
©2010 Micron Technology, Inc. All rights reserved.
Min
1.5
N25Q064 - 1.8V
Max
150
150
2.5
Unit
µs
µs
V