BCM43907KWBGT datasheet(6/128 Pages) CYPRESS

No. de pieza	BCM43907KWBGT

Descripción Electrónicos	WICED??IEEE 802.11 a/b/g/n SoC with an Embedded Applications Processor

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Table of Contents

BCM43907 Preliminary Data Sheet

Broadcom®

March 12, 2016 • 43907-DS104-R

Page 5

BROADCOM CONFIDENTIAL

Table of Contents

About This Document ................................................................................................................................13

Purpose and Audience.......................................................................................................................... 13

Acronyms and Abbreviations................................................................................................................. 13

Document Conventions ......................................................................................................................... 13

References............................................................................................................................................ 14

Technical Support ...................................................................................................................................... 14

Section 1: Overview .......................................................................................................... 15

Introduction................................................................................................................................................. 15

Features .............................................................................................................................................. 16

Standards Compliance............................................................................................................................... 16

Section 2: Power Supplies and Power Management ..................................................... 18

Power Supply Topology............................................................................................................................. 18

BCM43907 Power Management Unit Features......................................................................................... 18

Power Management................................................................................................................................... 20

PMU Sequencing ........................................................................................................................................ 22

Power-Off Shutdown .................................................................................................................................. 23

Power-Up/Power-Down/Reset Circuits..................................................................................................... 23

Section 3: Frequency References.................................................................................... 24

Crystal Interface and Clock Generation ................................................................................................... 24

External Frequency Reference.................................................................................................................. 25

Frequency Selection .................................................................................................................................. 26

External 32.768 kHz Low-Power Oscillator .............................................................................................. 27

Section 4: Applications Subsystem................................................................................. 28

Overview...................................................................................................................................................... 28

Applications CPU and Memory Subsystem ............................................................................................. 28

Memory-to-Memory DMA Core.................................................................................................................. 28

Cryptography Core..................................................................................................................................... 29

Section 5: Applications Subsystem External Interfaces ............................................... 30

Ethernet MAC Controller (MII/RMII)........................................................................................................... 30

GPIO............................................................................................................................................................. 30

Broadcom Serial Control ........................................................................................................................... 30

I2S................................................................................................................................................................. 30

JTAG and ARM Serial Wire Debug............................................................................................................ 32

PWM............................................................................................................................................................. 33

Real-Time Clock.......................................................................................................................................... 33

SDIO 3.0....................................................................................................................................................... 34

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