Register definition:
Status Register:
Bit Name                            Settings:
   7         Status Register Write Enable    0: Enabled(Default), 1: Disabled
   5         Top / Bottom                      0: Top(Default), 1: Bottom
6, 4 - 2     BP[3:0]                         See Protected Area table

Nonvolatile Configuration Register:
Address     Name                            Settings:
   0         I / O Mode:                     FFh: Default, DFh: Ext SPI / w DQS, E7h: Octal DDR, C7h Octal DDR / w DQS
   1         Dummy cycle Configuration       1Fh default - Value between 00h and 1Fh
   2         Reserved
   3         Prog.Output strength            FFh: 50ohm(default), FEh: 35ohm, FDh:25ohm, FCh: 18ohm
   4         Reserved
   5         Beyond 128Mb address config     FFh: 3 - byte address, FEh: 4 - byte address
   6         XIP config                      FFh = XIP Disabled(Default), FEh: 8IOFR, FDh: 8OFR, F8h: FAST READ
   7         Wrap Config                     FFh: Continuous, FEh: 64-byte, FD: 32-byte, FC: 16-byte

Password and Sector protection is currently not supported.