A
Datasheet
BT85x Series
Bluetooth v4.2 Dual-Mode USB HCI Module
Version 1.0
BT85x Series
Datasheet
R
EVISION
H
ISTORY
Version
1.0
Date
12 Jan 2018
Notes
Initial Release
Contributor
Jacky Kuo
Raj Khatri
Approver
Jonathan Kaye
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
2
© Copyright 2018 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT85x Series
Datasheet
CONTENTS
1
2
3
4
5
6
7
8
8.1.
8.2.
8.3.
8.4.
9
10
11
11.1.
12
12.1.
12.2.
12.3.
13
14
14.1.
15
16
17
18
19
Scope ..................................................................................................................................................................4
Operational Description .....................................................................................................................................4
Block Diagram and Descriptions .........................................................................................................................5
Specifications ......................................................................................................................................................6
Pin Definitions ....................................................................................................................................................7
DC Electrical Characteristics ...............................................................................................................................8
RF Characteristics ...............................................................................................................................................9
Interface .......................................................................................................................................................... 10
Global Coexistence Interface...................................................................................................................... 10
USB Interface .............................................................................................................................................. 10
PCM Interface ............................................................................................................................................. 10
I
2
S Interface ................................................................................................................................................ 16
Antenna Performance ..................................................................................................................................... 18
Mechanical Dimensions and Land Pattern ................................................................................................. 20
Implementation Note ................................................................................................................................. 21
PCB Layout on Host PCB ............................................................................................................................. 21
Application Note for Surface Mount Modules ........................................................................................... 23
Introduction ................................................................................................................................................ 23
Shipping ...................................................................................................................................................... 23
Reflow Parameters ..................................................................................................................................... 25
Japan (MIC) Regulatory .............................................................................................................................. 26
FCC Regulatory ........................................................................................................................................... 26
Documentation Requirements ................................................................................................................... 27
Industry Canada Regulatory ....................................................................................................................... 28
European Union Regulatory ....................................................................................................................... 30
Ordering Information ................................................................................................................................. 31
Bluetooth SIG Approvals ............................................................................................................................ 31
Additional Assistance ................................................................................................................................. 33
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
3
© Copyright 2018 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT85x Series
Datasheet
1 S
COPE
This document describes key hardware aspects of the Laird BT85x Bluetooth HCI module and Adapter. This
document is mainly intended to assist device manufacturers and related parties with the integration of this
module into their host devices. Data in this document are drawn from several sources including data sheets for
the Cypress CYW20704A2.
Because the BT850-Sx is currently in development stage, this document is preliminary and the information in
this document is subject to change. Please contact Laird Technologies or visit the
product page
on the Laird
website to obtain the most recent version of this document.
BT850-SA
BT850-ST
BT851
2 O
PERATIONAL
D
ESCRIPTION
The BT85x series of USB HCI modules and Adapter leverage the Cypress CYW20704 A2 chipset to provide
exceptionally low power consumption with outstanding range for OEMs needing both Classic Bluetooth and
Bluetooth Low Energy support. The Bluetooth v4.2 core specification shortens your development time and
provides enhanced throughput, security and privacy.
The BT850 modules are ideal when designers need both performance and minimum size. For maximum
flexibility in integration, they support a host USB interface, I
2
S and PCM audio interfaces, GPIO, and Cypress’GCI
coexistence (2-wire). The modules provide excellent RF performance and identical footprint options for
integrated antenna or an external antenna via a trace pin.
These modules present a Bluetooth standard HCI interface with native support for Windows, Linux and Android
Bluetooth software stacks for operating system backed devices. The BT851 Pluggable USB Adapter with inbuilt
Bluetooth stack simply plugs into any Windows, Android or Linux device via external USB connection.
Additionally, Laird has partnered with
Searan
for support of their ultra small, flexible ‘dotstack’ platform for
embedded Cortex M3 and M4 implementations.
Features and Benefits
▪
▪
▪
▪
▪
▪
▪
▪
▪
▪
▪
Bluetooth v4.2 - Dual Mode (Classic Bluetooth and BLE)
Compact footprint
2-wire Cypress Global Coexistence Interface (GCI)
High antenna radiation gain and efficiency
Good interference rejection for multi-com system (GSM/WCDMA)
Class 1 output
–
8 dBm
USB, I
2
S, and PCM
Industrial temperature range
512 k EEPROM support
Bluetooth Controller subsystem
FCC, IC, CE, RCM and Giteki approvals
4
© Copyright 2018 Laird. All Rights Reserved
Application Areas
▪
▪
▪
▪
▪
▪
Medical devices
ePOS terminals
Barcode scanners
Industrial cable replacement
IoT Platforms Automotive
Diagnostic Equipment
Personal Digital Assistants (PDA)
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT85x Series
Datasheet
3 B
LOCK
D
IAGRAM AND
D
ESCRIPTIONS
Figure 1: BT850 module block diagram
Table 1: Block diagram descriptions
CYW20704A2
(Main chip)
Antenna
Band Pass
Filter
EEPROM
Crystal
The BT85x is based on CYW20704A2 dual mode chip. The chip is a single-chip radio with on-
chip LDO regulators and baseband IC for Bluetooth 2.4 GHz systems including EDR to 3 Mbps.
Dedicated signal and baseband processing is included for full Bluetooth operation. The chip
provides I
2
S/PCM and USB interfaces. There are two general purpose I/Os be configured for
proprietary of Cypress GCI used and a general purpose I/O can be configured for
scan/inquire/paging/data traffic of indicator. These three I/O pins are controlled by
firmware.
BT850-SA & BT851
–
The antenna is a ceramic monopole chip antenna.
BT850-ST
–
Trace Pad provision for use with a range of certified External Antennas
The band pass filter filters the out-of-band emissions from the transmitter to meet the
specific regulations for type approvals of various countries.
There are 512 k bits EEPROM embedded on the BT85x which can be used to store
parameters, such as BD_ADDR, USB enumeration information, maximum TX power, PCM
configuration, USB product ID, USB vendor ID, and USB product description.
The embedded 40 MHz crystal is used for generating the clock for the entire module.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
5
© Copyright 2018 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
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