BCM4390DKWBGT Datasheet, PDF (5/78 Pages) Cypress Semiconductor – WICED™ Wi-Fi IEEE 802.11 b/g/n SoC with Embedded Application Processor

BCM4390 Advance Data Sheet
Table of Contents
Table of Contents
About This Document.....................................................................................................................................9
Purpose and Audience .............................................................................................................................9
Acronyms and Abbreviations...................................................................................................................9
Document Conventions ...........................................................................................................................9
Technical Support...........................................................................................................................................9
Section 1: Overview ........................................................................................................ 10
Overview.......................................................................................................................................................10
Features ........................................................................................................................................................10
Standards Compliance..................................................................................................................................11
Section 2: Power Supplies and Power Management ........................................................ 12
BCM4390 PMU Features ..............................................................................................................................12
Power Supply Topology................................................................................................................................12
Power Management.....................................................................................................................................14
PMU Sequencing ..........................................................................................................................................14
Power-Off Shutdown....................................................................................................................................15
Power-Up/Power-Down/Reset Circuits.......................................................................................................16
Section 3: Frequency References ..................................................................................... 17
Crystal Interface and Clock Generation .......................................................................................................17
External Frequency Reference .....................................................................................................................18
External 32.768 KHz Low-Power Oscillator..................................................................................................19
Section 4: Applications Microprocessor and Memory Unit .............................................. 21
Reset .............................................................................................................................................................21
Section 5: Applications Microprocessor Subsystem External Interfaces ........................... 22
Introduction..................................................................................................................................................22
SPI Flash Interface ........................................................................................................................................24
SPI Master/Slave Interface.....................................................................................................................24
UART Interfaces ............................................................................................................................................24
I²S Interface ..................................................................................................................................................25
General Purpose Input and Output .............................................................................................................26
I²C..................................................................................................................................................................27
Section 6: WLAN Global Functions................................................................................... 28
WLAN CPU and Memory Subsystem............................................................................................................28
One-Time Programmable Memory ..............................................................................................................28
BROADCOM ®
February 5, 2014 • 4390-DS103-R
WICED Wi-Fi IEEE 802.11 SoC w/Embedded App Processor
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