PP_STAT_SEL
#define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */
#define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */
#define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */