BCM4343W Data Sheet
Table of Contents
Table of Contents
About This Document ................................................................................................................................ 14
Purpose and Audience.......................................................................................................................... 14
Acronyms and Abbreviations................................................................................................................. 14
Document Conventions......................................................................................................................... 14
Technical Support ...................................................................................................................................... 14
Section 1: Overview .......................................................................................................... 15
Overview...................................................................................................................................................... 15
Features....................................................................................................................................................... 17
Standards Compliance...............................................................................................................................18
Section 2: Power Supplies and Power Management ..................................................... 19
Power Supply Topology............................................................................................................................. 19
BCM4343W PMU Features......................................................................................................................... 20
WLAN Power Management........................................................................................................................ 23
PMU Sequencing ........................................................................................................................................ 24
Power-Off Shutdown.................................................................................................................................. 25
Power-Up/Power-Down/Reset Circuits..................................................................................................... 25
Wireless Charging...................................................................................................................................... 26
Section 3: Frequency References.................................................................................... 29
Crystal Interface and Clock Generation ................................................................................................... 29
TCXO............................................................................................................................................................ 30
External 32.768 kHz Low-Power Oscillator .............................................................................................. 31
Section 4: WLAN System Interfaces................................................................................ 33
SDIO v2.0..................................................................................................................................................... 33
SDIO Pin Descriptions........................................................................................................................... 33
Generic SPI Mode....................................................................................................................................... 35
SPI Protocol .......................................................................................................................................... 36
Command Structure....................................................................................................................... 38
Write............................................................................................................................................... 38
Write/Read ..................................................................................................................................... 38
Read............................................................................................................................................... 38
Status............................................................................................................................................. 39
gSPI Host-Device Handshake............................................................................................................... 41
Boot-Up Sequence................................................................................................................................ 41
Section 5: Wireless LAN MAC and PHY .......................................................................... 44
MAC Features ............................................................................................................................................. 44
MAC Description ................................................................................................................................... 44
Broadcom®
Single-Chip IEEE 802.11 b/g/n MAC/Baseband/Radio
August 24, 2015 • 4343W-DS107-R
Page 5
BROADCOM CONFIDENTIAL
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