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AT86RF232
7.2.4 TX_ARET_ON – Transmit with Automatic Frame Retransmission and CSMA-CA Retry
............................................................................................................................................. 58
7.2.5 Interrupt Handling ........................................................................................................ 61
7.2.6 Register Summary ....................................................................................................... 62
7.2.7 Register Description – Control Registers..................................................................... 62
7.2.8 Register Description – Address Registers ................................................................... 75
8 Functional Description ..................................................................... 79
8.1 Introduction – IEEE 802.15.4-2006 Frame Format .............................................. 79
8.1.1 PHY Protocol Layer Data Unit (PPDU) ........................................................................ 79
8.1.2 MAC Protocol Layer Data Unit (MPDU)....................................................................... 80
8.2 Frame Check Sequence (FCS) ............................................................................ 84
8.2.1 Overview ..................................................................................................................... 84
8.2.2 CRC calculation ........................................................................................................... 84
8.2.3 Automatic FCS generation .......................................................................................... 85
8.2.4 Automatic FCS check .................................................................................................. 85
8.2.5 Register Description .................................................................................................... 86
8.3 Received Signal Strength Indicator (RSSI) .......................................................... 88
8.3.1 Overview ..................................................................................................................... 88
8.3.2 Reading RSSI.............................................................................................................. 88
8.3.3 Data Interpretation ....................................................................................................... 88
8.3.4 Register Description .................................................................................................... 89
8.4 Energy Detection (ED) ......................................................................................... 90
8.4.1 Overview ..................................................................................................................... 90
8.4.2 Measurement Description............................................................................................ 90
8.4.3 Data Interpretation ....................................................................................................... 91
8.4.4 Interrupt Handling ........................................................................................................ 91
8.4.5 Register Description .................................................................................................... 92
8.5 Clear Channel Assessment (CCA) ....................................................................... 93
8.5.1 Overview ..................................................................................................................... 93
8.5.2 Configuration and Request .......................................................................................... 93
8.5.3 Data Interpretation ....................................................................................................... 94
8.5.4 Interrupt Handling ........................................................................................................ 94
8.5.5 Measurement Time ..................................................................................................... 94
8.5.6 Register Description .................................................................................................... 95
8.6 Link Quality Indication (LQI) ................................................................................. 98
8.6.1 Overview ..................................................................................................................... 98
8.6.2 Request an LQI Measurement .................................................................................... 99
8.6.3 Data Interpretation ....................................................................................................... 99
9 Module Description ......................................................................... 100
9.1 Receiver (RX) ..................................................................................................... 100
9.1.1 Overview ................................................................................................................... 100
9.1.2 Frame Receive Procedure......................................................................................... 100
9.1.3 Configuration ............................................................................................................. 100
9.1.4 Register Description .................................................................................................. 101
9.2 Transmitter (TX) ................................................................................................. 103
9.2.1 Overview ................................................................................................................... 103
9.2.2 Frame Transmit Procedure........................................................................................ 103
9.2.3 Configuration ............................................................................................................. 103
9.2.4 TX Power Ramping ................................................................................................... 104
171
8321A – MCU Wireless – 10/11
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