void disableIObus( void );
Description
- This function disables external I/O bus and normal data bus operations resume on the Rabbit
3000 or Rabbit 4000.
- The external I/O bus must be disabled during normal bus operations with other devices and must
be enabled during any external I/O bus operation.
- This function is non-reentrant.
- Port A and B data shadow register values are NOT saved or restored in this function call.
- Parallel port A is set to a byte-wide input and parallel port B data direction register (PBDDR)
is set to an unknown state, which must be set by the user.
Library
- ExternIO.LIB (was in R3000.LIB prior to DC 10)
See Also
- enableIObus
