Register definitions: 

Status Register 1: B7 - B0
  Bit       Name                                Settings:
   7        Status Register Protect 1           0: Disable (Default), 1: Enable
   6        Top/Bottom Select                   0: Top (Default), 1: Bottom
  5-2       Block Protect [3:0]                 See Block Protect Table

Status Register 2: B7 - B0
  Bit       Name                                Settings:
   6        Top/Bottom Select                   0: Top (Default), 1: Bottom
  5-3       Lock Bit [3:1]                      0: Unlock (Default), 1: Lock (OTP)
   2        Quad Enable                         1: Quad Enable (Permanent)

Status Register 3: B7 - B0
  Bit       Name                                Settings:
  6-5       Output Driver Strength [1:0]        00: 120%, 01: 100% (Default), 10: 85%, 11: 50%
   2        WPS                                 0: Block Protection Mode (Default), 1: Advanced Sector Protection Mode
   1        ADP                                 0: 3-Byte Address (Default), 4-Byte Address

Status Register 4: B7 - B0
  Bit       Name                                Settings:
  6-5       Dummy Cycle [1:0]                   See Dummy Cycle Table
   3        PBE Bit                             0: Disable (Default), 1: Enable

Lock Register 4: B15 - B0
  Bit       Name                                Settings:
   6        SPBLKDN                             1: SPB Changeable (Default), 0: Freeze SPB (OTP)

    An SPB register is assigned to each 4KB sector in the bottom and top 64KB of memory and to each 64KB block in the remaining memory.
    Setting the SPB register of a sector/block to 0xFF will protect the data in that sector/block from modification.
    This device has 1054 SPB registers, indexed 0 - 1053

    To set a single SPB register, enter its index
    Example: To set SPB at index 13, enter 13

    To set a range of SPB registers, separate the low and high register indexes with a hyphen
    Example: To set SPBs at indexes 3 - 17, enter 3-17

    To specify multiple indexes or ranges, separate the indexes or ranges with a comma
    Example: To set SPB at indexes 13, 22-27, 31-40 and 47, enter 13,22-27,31-40,47