BCM43143KMLGT Datasheet, PDF (20/58 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11b/g/n MAC/PHY/Radio with USB/SDIO Host Interface

BCM43143 Advance Data Sheet
Wireless LAN MAC and PHY
Section 6: Wireless LAN MAC and PHY
IEEE 802.11n MAC Description
The IEEE 802.11n MAC features include:
• Enhanced MAC for supporting 802.11n features
• Programmable Access Point (AP) or Station (STA) functionality
• Programmable mode selection as Independent Basic Service Set (IBSS) or infrastructure
• Aggregated MAC Protocol Data Unit (MPDU) support for High Throughput (HT)
• Passive scanning
• Network Allocation Vector (NAV), Interframe Space (IFS), and Timing Synchronization Function (TSF)
functionality
• RTS/CTS procedure support
• 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
Announcement Traffic Indication Message (ATIM) window
• Coordination Function (CF) conformance: Setting a 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 packet sequences, 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 medium timing while minimizing driver
complexity. Also, the MAC driver processes incoming packets that have been buffered in the MAC core in bursts,
enabling high bandwidth performance.
The MAC driver interacts with the MAC core to prepare transmit packet queues and to analyze and forward
received packets to upper software layers. The internal blocks of the MAC core are connected to a
Programmable State Machine (PSM) through the host interface that connects to the internal bus (see Figure 7
on page 20).
Broadcom^®
November 14, 2014 • 43143-DS104-R
Single-Chip IEEE 802.11b/g/n MAC/PHY/Radio
Page 19