When WOR is enabled (TMRE=1, WOR_EN=1, WMODE=0 and TWOR=0), A9129F6 periodically wakes up from sleep and listen (auto-enter RX mode) for incoming packets without MCU interaction. Therefore, A9129F6 will stay in sleep mode based on WOR_SL timer and RX mode based on WOR_AC timer unless a packet is received. While MCU starts WOR function, the device goes to RX mode to check coming packets after a period (WOR_SL) in sleep mode. And then, A9129F6 is back to sleep mode for the next WOR cycle. Beware, please turn on MSCRC (0Eh, CRC data filtering) when CRCS=1 (0x20204, CRC select) in WOR function. 

There are three ways to activate WOR packet receiving procedure: by frame sync (ID matched), by preamble and by carrier. It is the way to define that RX circuitry will start to receive data according to frame sync signal (FSYNC) or preamble signal (PMDO) or carrier signal (CD) when a packet is coming during one active RX period under WOR mode. User could select this WOR activated way by setting [WOR_CD (0x2023), WOR_S (0x2023)]. (1) WOR by FSYNC ([WOR_CD, WOR_S]=[00]): If FSYNC (packet ID matched) goes high during WOR RX period, RX circuitry will stay turn on until the whole packet is received. (2) WOR by PMDO ([WOR_CD, WOR_S]=[01]): If PMDO (preamble detected) goes high during WOR RX period, RX circuitry will stay turn on until the whole packet is received. (3) WOR by CD ([WOR_CD, WOR_S]=[1x]): If CD (carrier detected) goes high during WOR RX period, RX circuitry will stay turn on until the whole packet is received. CDSEL has to be set to [11] for CD signal composed of RSSI and in-band carrier detect signal.

After RX receiving procedure is done, A9129F6 will acknowledge MCU this event by using TWOR signal. User could also let MCU know this event by FSYNC/PMDO/CD according to which activating way he is using and waked up in advance to wait for RX receiving procedure finished. While WN≥1, A9129F6 will also have repeated (WN+1) RX times between two WOR_SL period. The active and RX to RX space time are both decided by WOR_AC. The SPSS also defines the return state in this repeated (WN+1) RX scheme.