BCM43455 Datasheet, PDF (74/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
Wireless LAN MAC and PHY
Section 11: Wireless LAN MAC and PHY
IEEE 802.11ac MAC
The BCM43455 WLAN MAC is designed to support high-throughput operation with low-power consumption. It
does so without compromising the Bluetooth coexistence policies, thereby enabling optimal performance over
both networks. 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 28.
The following sections provide an overview of the important modules in the MAC.
Figure 28: 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
WEP
TKIP, AES, WAPI
IHR
BUS
TXE
TX A-MPDU
RXE
RX A-MPDU
SHM
BUS
Shared Memory
(6 KB)
PSM
UCODE
Memory
MAC-PHY Interface
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 73