BCM43236BKMLG Datasheet, PDF (16/43 Pages) Cypress Semiconductor – 2.4 GHz/5 GHz IEEE802.11n MAC/PHY/Radio Chip

BCM43236/BCM43236B Preliminary Data Sheet
IEEE 802.11n MAC Description
Figure 5: Recommended Oscillator Configuration
27 pF
OCS IN
1M
27 pF
221
NOTE: See Reference Schematics
OCS OUT
IEEE 802.11n MAC Description
The IEEE 802.11n MAC features include:
• Enhanced MAC for supporting IEEE 802.11n features
• Programmable Access Point (AP) or Station (STA) functionality
• Programmable Independent Basic Service Set (IBSS) or infrastructure mode
• Aggregated MPDU (MAC Protocol Data Unit) support for High-throughput (HT)
• Passive scanning
• Network Allocation Vector (NAV), Interframe Space (IFS), and Timing Synchronization Function (TSF)
functionality
• RTS/CTS procedure
• Transmission of response frames (ACK/CTS)
• Address filtering of receive frames as specified by IBSS rules
• Multirate support
• Programmable Target Beacon Transmission Time (TBTT), beacon transmission/cancellation and
programmable Announcement Traffic Indication Message (ATIM) window
• CF conformance: Setting NAV for neighborhood Point Coordination Function (PCF) operation
• Security through a variety of encryption schemes including WEP, TKIP, AES, WPA™, WAP2™, and
IEEE 802.1X
• Power management
• Statistics counters for MIB support
The MAC core supports the transmission and reception of sequences of packets, together with related timing,
without any packet-by-packet driver interaction. Time-critical tasks requiring response times of only a few
milliseconds are handled in the MAC core. This achieves the required timing on the medium while keeping the
host driver easier to write and maintain. Also, incoming packets are buffered in the MAC core, which allows the
MAC driver to process them in bursts, enabling high bandwidth performance.
BROADCOM ®
September 16, 2013 • 43236_43236B-DS103-R
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