N25Q128 - 1.8 V
Volatile and Non Volatile Registers
Figure 8.
Non Volatile and Volatile configuration Register Scheme
VCR (Volatile Configuration Register)
and VECR (Volatile Enhanced
Configuration Register)
NVCR
(Non Volatile Configuration Register)
Register download executed only
during the power on phase
Registers download executed after
a WRVCR or WRVECR
instructions, it overwrites NVCR
configurations on iCR
iCR
(internal Configuration Register)
Device behaviour
A Flag Status Register (FSR), 8 bits, is also available to check the status of the device,
detecting possible errors or a Program/Erase internal cycle in progress.
Each register can be read and modified by means of dedicated instructions in all the 3
protocols (Extended SPI, DIO-SPI, and QIO-SPI).
Reading time for all registers is comparable; writing time instead is very different: NVCR bits
are set as Flash Cell memory content requiring a longer time to perform internal writing
cycles. See Table 33.: AC Characteristics.
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