N25Q128 Datasheet, PDF (41/185 Pages) Numonyx B.V – 128-Mbit, 1.8 V, multiple I/O, 4-Kbyte subsector erase on boot sectors, XiP enabled, serial flash memory with 108 MHz SPI bus interface

N25Q128 - 1.8 V
Volatile and Non Volatile Registers
6.3.2
XIP Volatile Configuration bits (VCR bit 3)
The bit 3 of the Volatile Configuration Register is the XIP enabling bit, this bit must be set to
0 to enable the memory working on XIP mode. For devices with a feature set digit equal to 2
or 4 in the part number (Basic XiP), this bit is always Don't Care, and it is possible to operate
the memory in XIP mode without setting it to 0. See Section 16: Ordering information.
6.4
Volatile Enhanced Configuration Register
The Volatile Enhanced Configuration Register (VECR) affects the memory configuration
after every execution of Write Volatile Enhanced Configuration Register (WRVECR)
instruction: this instruction overwrite the memory configuration set during the POR
sequence by the Non Volatile Configuration Register (NVCR). Its purpose is:
„ enabling of QIO-SPI protocol and DIO-SPI protocol
Warning: WARNING: in case of both QIO-SPI and DIO-SPI enabled, the
memory works in QIO-SPI
„ HOLD (Reset) functionality disabling
„ To enable the VPP functionality in Quad I/O modify operations
„ To define output driver strength (3 bit)
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