BCM20705 datasheet(5/67 Pages) CYPRESS

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Table of Contents

BCM20705 Data Sheet

Broadcom

Bluetooth Transceiver and Baseband Processor

November 13, 2014 • MCS20705-DS104-R

Page 4

BROADCOM CONFIDENTIAL

Section 4: Microprocessor Unit ....................................................................................... 24

Overview

...................................................................................................................................................... 24

NVRAM Configuration Data and Storage

................................................................................................. 25

Serial Interface ...................................................................................................................................... 25

EEPROM

...................................................................................................................................................... 25

External Reset

............................................................................................................................................. 25

One-Time Programmable Memory

............................................................................................................ 26

Contents................................................................................................................................................ 27

Programming......................................................................................................................................... 27

Section 5: Peripheral Transport Unit ............................................................................... 28

PCM Interface

.............................................................................................................................................. 28

System Diagram.................................................................................................................................... 28

Slot Mapping ......................................................................................................................................... 29

Wideband Speech................................................................................................................................. 29

Frame Synchronization ......................................................................................................................... 30

Data Formatting..................................................................................................................................... 30

HCI Transport Detection Configuration

.................................................................................................... 30

USB Interface

.............................................................................................................................................. 31

Features ................................................................................................................................................ 31

Operation............................................................................................................................................... 31

USB Hub and UHE Support .................................................................................................................. 32

UART Interface

............................................................................................................................................ 33

HCI 3-Wire Transport (UART H5) ......................................................................................................... 33

SPI

................................................................................................................................................................ 34

Simultaneous UART Transport and Bridging

.......................................................................................... 34

Section 6: Frequency References .................................................................................... 35

Crystal Interface and Clock Generation

................................................................................................... 35

Crystal Oscillator

........................................................................................................................................ 37

External Frequency Reference

.................................................................................................................. 37

TCXO Clock Request Support .............................................................................................................. 38

Frequency Selection

.................................................................................................................................. 38

Frequency Trimming

.................................................................................................................................. 39

LPO Clock Interface

................................................................................................................................... 39

Section 7: Pin-out and Signal Descriptions .................................................................... 40

Pin Descriptions

......................................................................................................................................... 40

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