Register definition: 
Status Register 1: S7 - S0
  Bit        Name                            Settings:
   6         Sector Protect                  0: 64k Sectors, 1: 4k Sectors
   5         Tob/Bottom Protection           0: TOP, 1: BOTTOM
  4-2        Block Protection Bits[2:0]      See Protected Area table

Status Register 2: S15 - S8
  Bit        Name                            Settings:    
   15        Suspend Status - read only 
   14        Complement Protect              0: non-reversed, 1: reversed 
 13-11       Security Register Lock Bits 3-1 0: Unlocked, 1: Locked (OTP)
   9         Quad Enable                     1: Enabled (Default) Permanently Enabled
   8         Status Register Lock - volatile

Status Register 3: S23 - S16
  Bit        Name                            Settings:    
 22-21       Output Drive Strength 1-0       00:100%, 01:75%, 10:50%, 11:25%
   18        Write Protect Selection         0: CMP-SEC-TB-BP[2:0], 1: Individual Block Lock