BCM43907 Datasheet, PDF (46/128 Pages) Cypress Semiconductor – WICED™ IEEE 802.11 a/b/g/n SoC with an Embedded Applications Processor

BCM43907 Preliminary Data Sheet
Figure 12: WLAN MAC Architecture
IEEE 802.11n MAC
PMQ
IFS
Backoff, BTCX
TSF
NAV
EXT- IHR
Embedded CPU Interface
Host Registers, DMA Engines
TX-FIFO
32 KB
RX-FIFO
10 KB
PSM
PSM
UCODE
Memory
WEP
TKIP, AES, WAPI
IHR
BUS
TXE
TX A-MPDU
RXE
RX A-MPDU
SHM
BUS
Shared Memory
6 KB
MAC-PHY Interface
The BCM43907 WLAN MAC supports features specified in the IEEE 802.11 base standard and amended by
IEEE 802.11n. The key MAC features include:
• Transmission and reception of aggregated
MPDUs (A-MPDU) for high throughput (HT).
• Support for power management schemes,
including WMM power-save, power-save multi-
poll (PSMP), and multiphase PSMP operation.
• Support for immediate ACK and Block-ACK
policies.
• Interframe space timing support, including RIFS.
• Support for RTS/CTS and CTS-to-self frame
sequences for protecting frame exchanges.
• Back-off counters in hardware for supporting
multiple priorities as specified in the WMM
specification.
• Timing synchronization function (TSF), network
allocation vector (NAV) maintenance, and target
beacon transmission time (TBTT) generation in
hardware.
• Hardware offload for AES-CCMP, legacy WPA
TKIP, legacy WEP ciphers, WAPI, and support for
key management.
• Support for coexistence with Bluetooth and other
external radios.
• Programmable independent basic service set
(IBSS) or infrastructure basic service set
functionality.
• Statistics counters for MIB support.
Broadcom^®
March 12, 2016 • 43907-DS104-R
BROADCOM CONFIDENTIAL
Page 45