BCM43907 Datasheet, PDF (6/128 Pages) Cypress Semiconductor – WICED™ IEEE 802.11 a/b/g/n SoC with an Embedded Applications Processor

BCM43907 Preliminary Data Sheet
Table of Contents
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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March 12, 2016 • 43907-DS104-R
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