P R O G R A M M E R  22 size to eight locations. If clear, disable programming of the RTW and RTE_IE bits and to limit the program stack size to two locations. SLEEP_&LK ² Sleep &lock Disable, SX48/52 only option. If set, enable clock operation during power down mode  to  allow  fast  start-up.  If  clear,  disable  clock  operation  during  power  down  mode  to  reduce  power consumption. XTLBUF_EN  ²  &rystal  Buffer  enable,  SX48/52  only  option.  Set,  if  use  external  resonator/crystal.  &lear  to reduce power consumption, if use internal oscillator or external clock signal. Fuse window ² This window display all Fuse Word Register &onfiguration bits. It is possible to modify it content directly; however selecting options with as described above will be more easy and friendly. FuseX window ² This window display all FuseX Word Register &onfiguration bits. It is possible to modify it content directly; however selecting options with as described above will be more easy and friendly. Dev Word window ² This window display Device Word: hard-wired read-only Part ID. The following Part ID exist: FEE SX18 (20)/28 v2.5 FDE SX28 v4.1 F&E SX28 v5.2 001 SX48/52 v1.0 002 SX48/52 v2.1 Device   ID   window  ²  This  window  allow  to  add  user  identification  to  the  programmed  device.  This identification will be programmed into special user code ID locations, not accessible from the user program. Up to 8 AS&II symbols can be written. This ID can help identify the code-protected device, when read it.