BCM43903KUBGT Datasheet, PDF (33/87 Pages) Cypress Semiconductor – WICED™ IEEE 802.11 b/g/n SoC with an Embedded Applications Processor

BCM43903 Preliminary Data Sheet
Figure 8: 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 BCM43903 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 • 43903-DS102-R
BROADCOM CONFIDENTIAL
Page 32