1.General 1.1 The General of WIFI General n CMOS MAC，Baseband PHY and RF chip for IEEE 802.11a/b/g/n/ac compatible WLAN n 802.11ac MIMO solution for 5G band n Complete 802.11n MIMO solution for 2.4GHz and 5GHz band n 2×2 MIMO technology for extended reception robustness and exceptional throughput n Maximun PHY data rate up to173.3Mbps using 20Mhz bandwidth， 400Mbps using 40MHz bandwidth， and 866.7Mbps using 80MHz bandwidth n Backward compatible with 802.11a/b/g devices while operating at 802.11n data rates n Backward compatible with 802.11a/n devices while operating at 802.11ac data rates. Host Interface n Complies with USB Specification Revision n Standards Supported n IEEE 802.11a/b/g/n/ac Draft 2.0 compatible WLAN n IEEE 802.11e QoS Enhancement （WMM） n IEEE 802.11i （WPA， WPA2）。 Open， shared and pair-wise key authentication services n IEEE 802.11h TPC， Spectrum Measurement n IEEE 802.11k Radio Resource Measurement n WAPI （Wireless Authentication Privacy Infrastructure） certified. n Cisco Compatible Extensions （CCX） for WLAN devices MAC Features n Frame aggregation for increased MAC efficiency （A-MSDU， A-MPDU） n Low latency immediate High-Throughput Block Acknow ledgement （HT-BA） n Long NAV for media reservation with CMOS MAC，Baseband PHY and RF in a single Draft 2.0 802.11ac MIMO solution for 5G band Complete 802.11n MIMO solution for 2.4GHz 2×2 MIMO technology for extended reception robustness and exceptional throughput Maximun PHY data rate up to173.3Mbps using bandwidth， 400Mbps using 40MHz bandwidth， and 866.7Mbps using 80MHz Backward compatible with 802.11a/b/g devices while operating at 802.11n data rates Backward compatible with 802.11a/n devices while operating at 802.11ac data rates. Complies with USB Specification Revision 2.0 IEEE 802.11a/b/g/n/ac Draft 2.0 compatible 802.11e QoS Enhancement （WMM） IEEE 802.11i （WPA， WPA2）。 Open， shared key， wise key authentication services IEEE 802.11h TPC， Spectrum Measurement IEEE 802.11k Radio Resource Measurement WAPI （Wireless Authentication Privacy Cisco Compatible Extensions （CCX） for Frame aggregation for increased MAC efficiency Throughput Block Long NAV for media reservation with CF-End