IC_OST
#define IC_OST0 IC_OST (0) /* OS Timer match 0 */
#define IC_OST1 IC_OST (1) /* OS Timer match 1 */
#define IC_OST2 IC_OST (2) /* OS Timer match 2 */
#define IC_OST3 IC_OST (3) /* OS Timer match 3 */