Keywords: sdccman

## 4.6.4 Configuration Bits

Configuration bits (also known as fuses) can be configured using `__code' and `__at' modifiers. Possible options should be ANDed and can be found in your processor header file. Example for PIC16F88:

  #include <pic16f88.h> //Contains config addresses and options
  #include <stdint.h> //Needed for uint16_t
  static __code uint16_t __at (_CONFIG1) configword1 = _INTRC_IO &
  _CP_ALL & _WDT_OFF & [...];
  static __code uint16_t __at (_CONFIG2) configword2 = [...];

Although data type is ignored if the address (__at()) refers to a config word location, using a type large enough for the configuration word (uint16_t in this case) is recommended to prevent changes in the compiler (implicit, early range check and enforcement) from breaking the definition.
If your processor header file doesn't contain config addresses you can declare it manually or use a literal address:

  static __code uint16_t __at (0x2007) configword1 = _INTRC_IO &
  _CP_ALL & _WDT_OFF & [...];