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ATWINC3400 Scheda tecnica(PDF) 14 Page - ATMEL Corporation |
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ATWINC3400 Scheda tecnica(HTML) 14 Page - ATMEL Corporation |
14 / 35 page ATWINC3400-Datasheet [PRELIMINARY DATASHEET] Atmel-42396C-SmartConnect-ATWINC3400_Preliminary-Datasheet_07/2015 1 4 14 RTS-CTS and CTS-self support Supports either STA or AP mode in the infrastructure basic service set mode Supports independent basic service set (IBSS) 7.1.2 Description The ATWILC3400 MAC is designed to operate at low power while providing high data throughput. The IEEE 802.11 MAC functions are implemented with a combination of dedicated data path engines, hardwired control logic, and a low-power, high-efficiency microprocessor. The combination of dedicated logic with a programmable processor provides optimal power efficiency and real-time response while providing the flexibility to accommodate evolving standards and future feature enhancements. Dedicated data path engines are used to implement data path functions with heavy computational. For example, an FCS engine checks the CRC of the transmitting and receiving packets, and a cipher engine performs all the required encryption and decryption operations for the WEP, WPA-TKIP, WPA2 CCMP-AES, and WAPI security requirements. Control functions which have real-time requirements are implemented using hardwired control logic modules. These logic modules offer real-time response while maintaining configurability via the processor. Examples of hardwired control logic modules are the channel access control module (implements EDCA/HCCA, Beacon TX control, interframe spacing, etc.), protocol timer module (responsible for the Network Access Vector, back-off timing, timing synchronization function, and slot management), MPDU handling module, aggregation/de- aggregation module, block ACK controller (implements the protocol requirements for burst block communication), and TX/RX control FSMs (coordinate data movement between PHY-MAC interface, cipher engine, and the DMA interface to the TX/RX FIFOs). The MAC functions implemented solely in software on the microprocessor have the following characteristics: Functions with high memory requirements or complex data structures. Examples are association table management and power save queuing Functions with low computational load or without critical real-time requirements. Examples are authentication and association Functions which need flexibility and upgradeability. Examples are beacon frame processing and QoS scheduling 7.2 PHY 7.2.1 Features The ATWILC3400 IEEE802.11 PHY supports the following functions: Single antenna 1x1 stream in 20MHz channels Supports IEEE 802.11b DSSS-CCK modulation: 1, 2, 5.5, and 11Mbps Supports IEEE 802.11g OFDM modulation: 6, 9, 12,18, 24, 36, 48, and 54Mbps Supports IEEE 802.11n HT modulations MCS0-7, 20MHz, 800 and 400ns guard interval: 6.5, 7.2, 13.0, 14.4, 19.5, 21.7, 26.0, 28.9, 39.0, 43.3, 52.0, 57.8, 58.5, 65.0, and 72.2Mbps IEEE 802.11n mixed mode operation Per packet TX power control Advanced channel estimation/equalization, automatic gain control, CCA, carrier/symbol recovery, and frame detection |
Codice articolo simile - ATWINC3400 |
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Descrizione simile - ATWINC3400 |
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