CYW20706
Embedded Bluetooth 4.2 SoC with MCU, Bluetooth
Transceiver, and Baseband Processor
The Cypress CYW20706 is a monolithic, single-chip, Bluetooth 4.2 + HS compliant SOC, comprising a baseband processor, an ARM
Cortex-M3 processor, and an integrated transceiver. It is designed for use in embedded applications, with on-chip support for an
embedded stack. Manufactured using the industry's most advanced 40 nm CMOS low-power process, the CYW20706 employs the
highest level of integration, eliminating all critical external components, and thereby minimizing the device’s footprint and costs
associated with the implementation of Bluetooth solutions.
The CYW20706 is the optimal solution for voice, data, home automation, accessories and other applications that require a Bluetooth
SIG standards-compliant interface. The CYW20706 supports a host command interface (HCI) through USB or UART and also
supports PCM audio.
The CYW20706 transceiver’s enhanced radio performance meets the most stringent industrial temperature application requirements
for compact integration into mobile handset and portable devices. The CYW20706 provides full radio compatibility, enabling it to
operate simultaneously with GPS and cellular radios.
Cypress Part Numbering Scheme
Cypress is converting the acquired IoT part numbers from Broadcom to the Cypress part numbering scheme. Due to this conversion,
there is no change in form, fit, or function as a result of offering the device with Cypress part number marking. The table provides
Cypress ordering part number that matches an existing IoT part number.
Table 1. Mapping Table for Part Number between Broadcom and Cypress
Broadcom Part Number
BCM20706
BCM20706UA1KFFB1G
CYW20706
CYW20706UA1KFFB1G
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Cypress Part Number
Features
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Interface support for USB or high-speed UART interface and
PCM for audio data
USB2.0 full-speed (12 Mbps)
Supports Broadcom proprietary 2 Mbps low energy mode.
Ultra-low power consumption
Supports serial flash interfaces
Available in a 49-ball FcBGA package
Supports mobile and PC applications without external memory
125-bump WLCSP available December 2014
Complies with Bluetooth Core Specification Version 4.2+ HS
with provisions for supporting future specifications
Bluetooth Class 1 or Class 2 transmitter operation
Supports extended synchronous connections (eSCO), for
enhanced voice quality by allowing for retransmission of
dropped packets
Adaptive frequency hopping (AFH) for reducing radio
frequency interference
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Applications
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Home automation gateways, audio streaming, and other home automation use cases
Bluetooth 4.2 embedded peripheral devices and accessories
Personal digital assistants
Automotive telematic systems
Cypress Semiconductor Corporation
Document Number: 002-14790 Rev. *B
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised Monday, May 29, 2017
CYW20706
Figure 1. Functional Block Diagram
PCM/I
2
S
USB
UART
GPIO
SPI Master
BSC
CYW20706
High-Speed
Peripheral Transport
Unit (PTU)
Radio Transceiver
Microprocessor and
Memory Unit (µPU)
Bluetooth Baseband
Core (BBC)
IoT Resources
Cypress provides a wealth of data at
http://www.cypress.com/internet-things-iot
to help you to select the right IoT device for your
design, and quickly and effectively integrate the device into your design. Cypress provides customer access to a wide range of
information, including technical documentation, schematic diagrams, product bill of materials, PCB layout information, and software
updates. Customers can acquire technical documentation and software from the Cypress Support Community website (http://
community.cypress.com/)
Document Number: 002-14790 Rev. *B
Page 2 of 50
CYW20706
Contents
1. Overview ........................................................................ 4
1.1 Major Features ...................................................... 4
1.2 Block Diagram ....................................................... 6
1.3 Usage Model ......................................................... 7
2. Integrated Radio Transceiver ...................................... 8
2.1 Transmit ................................................................ 8
2.2 Receiver ................................................................ 8
2.3 Local Oscillator Generation ................................... 8
2.4 Calibration ............................................................. 8
2.5 Internal LDO .......................................................... 9
3. Bluetooth Baseband Core ......................................... 10
3.1 Bluetooth Low Energy ......................................... 10
3.2 Bluetooth 4.2 Features ........................................ 10
3.3 Bluetooth 4.0 Features............................................. 10
3.4 Link Control Layer ............................................... 11
3.5 Test Mode Support .............................................. 11
3.6 Power Management Unit ..................................... 11
3.7 Adaptive Frequency Hopping .............................. 13
3.8 Collaborative Coexistence ................................... 13
3.9 Global Coexistence Interface .............................. 13
4. Microprocessor Unit ................................................... 14
4.1 Overview ............................................................. 14
4.2 NVRAM Configuration Data and Storage ............ 14
4.3 EEPROM ............................................................. 14
4.4 External Reset ..................................................... 14
4.5 One-Time Programmable Memory ...................... 15
5. Peripheral Transport Unit .......................................... 16
5.1 PCM Interface ..................................................... 16
5.2 HCI Transport Detection Configuration ............... 17
5.3 USB Interface ...................................................... 17
5.4 UART Interface .................................................... 18
5.5 Simultaneous UART Transport and Bridging ...... 19
6. Frequency References ............................................... 20
6.1 Crystal Interface and Clock Generation .............. 20
6.2 Crystal Oscillator ................................................. 21
6.3 Frequency Selection ............................................ 21
6.4 Frequency Trimming ........................................... 21
7. Pin-out and Signal Descriptions ............................... 22
7.1 Pin Descriptions .................................................. 22
8. Ball Grid Arrays .......................................................... 24
9. Electrical Characteristics ........................................... 25
9.1 RF Specifications ................................................ 29
9.2 Timing and AC Characteristics ............................ 32
2
S Interface............................................................... 40
9.3 I
10. Mechanical Information ........................................... 46
10.1 Tape, Reel, and Packing Specification .............. 47
11. Ordering Information ................................................ 48
Document History .......................................................... 49
Document Number: 002-14790 Rev. *B
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CYW20706
1. Overview
The Broadcom CYW20706 complies with Bluetooth Core Specification, version 4.2+ HS and is designed for use in embedded BT4.2
and UART/USB HCI applications. The combination of the Bluetooth Baseband Core (BBC), a Peripheral Transport Unit (PTU), and
a Cortex-M3 based microprocessor with on-chip ROM provides a lower and upper layer Bluetooth stack, including Link Controller
(LC), Link Manager (LM), and HCI.
1.1 Major Features
Major features of the CYW20706 include:
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Bluetooth v4.2 + EDR with integrated Class 1 PA
BT host digital interface (can be used concurrently with below interfaces):
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USB 2.0 full-speed (up to 12 Mbps)
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UART (up to 4 Mbps)42
Integrated RF section
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Single-ended, 50Ω RF interface
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Built-in TX/RX switch functionality
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TX Class 1 output power capability
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RX sensitivity basic rate of –93.5 dBm
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RX sensitivity for Low Energy of –96.5 dBm
GCI-enhanced coexistence support, ability to coordinate BT SCO transmissions around WLAN receives
Supports maximum Bluetooth data rates over HCI UART, USB, and SPI interfaces
I
2
S/PCM for BT audio
High-speed UART (H4, H4+) transport support
Wideband speech support (16 bits linear data, MSB first, left-justified at 4K samples/s for transparent air coding, both through I
2
S
and PCM interface)
Bluetooth SmartAudio
®
technology improves voice and music quality to headsets
Bluetooth low-power inquiry and page scan
Bluetooth low energy (BLE) support
Supports Broadcom proprietary 2 Mbps low energy mode
Maximum of 100 LE Connections
Supports TBFC (Triggered Broadcom [Bluetooth] Fast Connect)
Bluetooth packet loss concealment (PLC)
Bluetooth wide band speech (WBS)
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Document Number: 002-14790 Rev. *B
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CYW20706
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High-speed UART transport support
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H4 five-wire UART (four signal wires, one ground wire)
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Maximum UART baud rates of 4 Mbps
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Low-power out-of-band BT_WAKE and HOST_WAKE signaling
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Proprietary compression scheme (allows more than two simultaneous A2DP packets and up to five devices at a time)
HCI USB transport support
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USB version 2.0 full-speed compliant interface
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UHE (proprietary method for emulating a human interface device (HID) at system boot up)
Standard Bluetooth test modes
Extended radio and production test mode features
Full support for power savings modes:
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Bluetooth standard sniff
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Deep sleep modes and regulator shutdown
Built-in LPO clock
Larger patch RAM space to support future enhancements
Serial flash Interface with native support for devices from several manufacturers
One-Time Programmable (OTP) memory
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Document Number: 002-14790 Rev. *B
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