BCM4319XKUBGT Datasheet, PDF (37/84 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/ Radio with Integrated SDIO and USB Interfaces

BCM4319 Preliminary Data Sheet
MAC Features
• Interframe space timing support, including reduced interframe spacing (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, and support for key
management
• Support for coexistence with Bluetooth^® (BT) and other external radios
• Programmable independent basic service set (IBSS) or infrastructure basic service set functionality
• Statistics counters for management information base (MIB) support
MAC Description
The BCM4319 WLAN MAC is designed to support high throughput operation with low power consumption. In
addition, several power saving modes have been implemented that allow the MAC to consume very little power
while maintaining network wide timing synchronization. The architecture diagram of the MAC is shown in
Figure 14.
The following sections provide an overview of the important MAC modules.
Figure 14: WLAN MAC Architecture
Embedded CPU Interface
Host Registers, DMA Engines
PMQ
IFS
Backoff, BTCX
TSF
NAV
EXT- IHR
TX-FIFO
32 KB
RX-FIFO
10 KB
PSM
WSE
WEP, TKIP, AES
IHR
BUS
TXE
TX A-MPDU
RXE
RX A-MPDU
SHM
BUS
Shared Memory
6 KB
MAC - PHY Interface
PSM
UCODE
Memory
Broadcom^®
April 2, 2014 • 4319-DS05-R
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
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