A User Guide BT85x Series Bluetooth v4.2 Dual-Mode USB HCI Module Version 1.
BT85x Series Datasheet REVISION HISTORY Version 1.0 Date 07 Nov 2017 Notes Initial Release Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth Contributor Jacky Kuo 2 © Copyright 2017 Laird.
BT85x Series Datasheet CONTENTS 1 Scope ....................................................................................................................................................... 4 2 Operational Description ........................................................................................................................... 4 3 Block Diagram and Descriptions ............................................................................................................... 5 4 Specifications .
BT85x Series Datasheet 1 SCOPE 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.
BT85x Series Datasheet 3 BLOCK DIAGRAM AND DESCRIPTIONS Figure 1: BT850 module block diagram 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 onchip 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 I2S/PCM and USB interfaces.
BT85x Series Datasheet 4 SPECIFICATIONS Table 1: BT850 specifications Categories Feature Bluetooth® Frequency Wireless Specification Maximum Transmit Power Implementation V4.2 Dual Mode – BR / EDR / LE 2.402 - 2.480 GHz Class 1 +8 dBm from antenna Receive Sensitivity Range Data Rates -94 dBm Circa 100 meters Up to 3 Mbps (over-the-air) USB GPIO HCI UHE 2-wire 802.11 (Wi-Fi) Full speed USB 2.0 3.
BT85x Series Datasheet Pin No. 5 6 7 Pin Name USB_DGND NC I/O Bidirectional GND Supply Domain 3V3 8 RESET Input 3v3 9 3v3 Input 3v3 10 NC 11 12 13 14 15 16 GND GND GND GND GND GND Description USB data negative Ground Active-low reset input Module main DC power supply, Input to internal 1.2V and 2.
BT85x Series Datasheet 6 DC ELECTRICAL CHARACTERISTICS Table 3: Recommended operating conditions Rating Storage temperature Min -40 Max +150 Unit ⁰C Operating Temperature 3V3 Input -30 3.0 +85 3.6 ⁰C V Table 4: Digital I/O characteristics Normal Operation Min Typ. VIL Input Low Voltage (VDDO = 3.3V) VIH Input High Voltage (VDDO = 3.3V) VOL Output Low Voltage VOH Output High Voltage IIL Input Low Current IIH Input High Current 2.0 3V3-0.4 - IOL Output Low Current (VDDO = 3.3V, VOL = 0.
BT85x Series Datasheet Parameter Initial Carrier Frequency Tolerance 20 dB Bandwidth In-Band Spurious 1.0 MHz < |M-N| < 1.5 MHz Emissions 1.5 MHz < |M-N| < 2.5 MHz |M-N| ≧ 2.5 MHz Drift rate ∆F1Avg ∆F2Max ∆F2Avg / ∆F1Avg LE ∆F1Avg LE ∆F2Max LE ∆F2Avg / ∆F1Avg Min - Typ. 10 920 - Max -39 BT. Spec. ±75 1000 -26 Unit kHz kHz dBc 100 - 10 152 1.0 -39 -47 - -20 -40 +/-25 140<>175 99.9 ≧ 0.8 dBm dBm kHz kHz % 100 - 245 1.0 - 225<>275 99.9 ≧ 0.
BT85x Series Datasheet 8.2. USB Interface BT85x has a full-speed (12 Mbps) USB interface for communicating with other compatible digital devices. The USB interface on the BT85x acts as a USB peripheral, responding to requests from a master host controller. BT85x supports the Universal Serial Bus Specification (USB v2.0 Specification) and USB Battery Charging Specification, available from http://www.usb.org.
BT85x Series Datasheet Figure 2: PCM timing diagram (Short-Frame Sync, Master Mode) Table 9: PCM Interface timing specifications (Short-Frame Sync, Master Mode) Ref No.
BT85x Series Datasheet Ref No.
BT85x Series Datasheet Figure 5 and Table 12 shows PCM Timing Diagram and Specifications for the slave mode of long-frame. Figure 5: PCM timing diagram (Long-Frame Sync, Slave Mode) Table 12: PCM Interface timing specifications (Long-Frame Sync, Slave Mode) Ref No.
BT85x Series Datasheet 8.3.5. Multiplexed Bluetooth Over PCM Bluetooth supports multiple audio streams within the Bluetooth channel and both 16 kHz and 8 kHz streams can be multiplexed. This mode of operation is only supported when the Bluetooth host is the master. Figure 6 shows the operation of the multiplexed transport with three simultaneous SCO connections. To accommodate additional SCO channels, the transport clock speed is increased.
BT85x Series Datasheet Table 13: PCM burst mode specifications (Receive Only, Short-Frame Sync) Ref No. 1 2 3 4 Characteristics PCM bit clock frequency PCM bit clock LOW PCM bit clock HIGH PCM_SYNC setup Minimum 20.8 20.8 8 Typical - Maximum 24 - Unit MHz ns ns ns 5 6 7 PCM_SYNC_hold PCM_IN setup PCM_IN hold 8 8 8 - - ns ns ns Figure 8 and Table 14 shows PCM Burst mode timing diagram and specifications for the receive-only mode of long-frame sync.
BT85x Series Datasheet I2S SCK and I2S WS become outputs in master mode and inputs in slave mode, while I2S SDO always stays as an output. The channel word length is 16 bits and the data is justified so that the MSB of the left-channel data is aligned with the MSB of the I2S bus, per the I2S specification. The MSB of each data word is transmitted one bit clock cycle after the I2S WS transition, synchronous with the falling edge of bit clock.
BT85x Series Datasheet The time periods specified in Figure 9 and Figure 10 are defined by the transmitter speed. The receiver specifications must match transmitter performance. Figure 9: I2S transmitter timing Figure 10: I2S receiver timing 8.5. BSC (Cypress Serial Control) Master Interface BT850-Sx includes a Cypress Serial Control (BSC) master interface. The BSC interface supports low-speed and fast mode devices and is compatible with I2C slave devices.
BT85x Series Datasheet NVRAM may contain configuration information about the customer application, including the following: Fractional-N information BD_ADDR UART baud rate USB enumeration information SDP service record File system information used for code, code patches, or data Figure 11 and Table 16 define the timing requirements for the BSC interface. Figure 11: BSC interface timing diagram Table 16: BSC interface timing specifications Ref No.
BT85x Series Datasheet 9 ANTENNA PERFORMANCE Table 17, Figure 12, and Figure 13 shows the antenna gain and performance. Table 17: Antenna gain Unit in dBi @ 2440 MHz AT3216-B2R7HAA XY-plane Peak Avg. 1.7 -2.9 XZ-plane Peak Avg. 2.3 -2.3 YZ-plane Peak Avg. 0.2 -5.4 Efficiency 55% Figure 12: Antenna return loss Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 19 © Copyright 2017 Laird.
BT85x Series Datasheet Figure 13: Antenna patterns Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 20 © Copyright 2017 Laird.
BT85x Series Datasheet 10 MECHANICAL DIMENSIONS AND LAND PATTERN 10.1. BT850-Sx Mechanical Drawing BT850 PCB Edge Note: Dimensions are in millimeters Tolerances: .xx ±0.03 mm .x ±1.3 mm Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 21 © Copyright 2017 Laird.
BT85x Series Datasheet 11 IMPLEMENTATION NOTE 11.1. PCB Layout on Host PCB Checklist (for PCB): MUST locate the BT850 module close to the edge of PCB. Use solid GND plane on inner layer (for best EMC and RF performance). Place GND vias close to module GND pads as possible Route traces to avoid noise being picked up on VCC supply. Antenna Keep-out area: – Ensure there is no copper in the antenna keep-out area on any layers of the host PCB.
BT85x Series Datasheet 11.1.2. USB Dongle Design Example Using BT850-SA Figure 15: USB dongle design schematic Figure 16: BT851 USB dongle, containing embedded BT850-SA Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 23 © Copyright 2017 Laird.
BT85x Series Datasheet 12 APPLICATION NOTE FOR SURFACE MOUNT MODULES 12.1. Introduction Laird surface mount modules are designed to conform to all major manufacturing guidelines. This application note is intended to provide additional guidance beyond the information that is presented in the user manual. This application note is considered a living document and is updated as new information is presented. The modules are designed to meet the needs of a number of commercial and industrial applications.
BT85x Series Datasheet 12.2.2. Tape and Reel Package Information Note: Ordering information for Tape and Reel packaging is an addition of T/R to the end of the full module part number. For example, BT850-Sx becomes BT850-Sx-T/R. Figure 18: Reel specifications Figure 19: Tape specifications There are 2500 BT850-Sx modules taped in a reel (and packaged in a pizza box) and five boxes per carton (12,500 modules per carton). Reel, boxes, and carton are labeled with the appropriate labels. See Figure 20.
BT85x Series Datasheet 1.1.1.1 Packaging Process Figure 20: Packaging process 12.3. Reflow Parameters Laird surface mount modules are designed to be easily manufactured, including reflow soldering to a PCB. Ultimately it is the responsibility of the customer to choose the appropriate solder paste and to ensure oven temperatures during reflow meet the requirements of the solder paste. Laird’s surface mount modules conform to J-STD-020D1 standards for reflow temperatures.
BT85x Series Datasheet Temperatures should not exceed the minimums or maximums presented in Table 18. Table 18: Recommended maximum and minimum temperatures Specification Temperature Inc./Dec. Rate (max) Temperature Decrease rate (goal) Soak Temp Increase rate (goal) Value 1~3 2-4 .
BT85x Series Datasheet 14 FCC REGULATORY Model BT850-SA BT850-ST US/FCC SQGBT850 SQGBT850 BT851 DVK-BT850-SA DVK-BT850-ST SQGBT850 CANADA/IC The BT85x family has been designed to operate with the antenna listed below having a maximum gain of 0.5 dBi. The required antenna impedance is 50 ohms. Item 1 2 3 4 Part Number AT3216-B2R7HAA 001-0030 mFlexPIFA 001-0014 FlexPIFA 0600-00040 Mfg. ACX LAIRD LAIRD LAIRD Type Ceramic PIFA PIFA Dipole Gain (dBi) 0.
BT85x Series Datasheet required with this module installed Important Note: If these conditions cannot be met (for example, certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
BT85x Series Datasheet 15 INDUSTRY CANADA REGULATORY This device complies with Industry Canada’s license-exempt RSSs. Operation is subject to the following two conditions: 1. This device may not cause interference; and 2. This device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: 1.
BT85x Series Datasheet Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre émetteur), l'autorisation du Canada n'est plus considéré comme valide et l'ID IC ne peut pas être utilisé sur le produit final. Dans ces circonstances, l'intégrateur OEM sera chargé de réévaluer le produit final (y compris l'émetteur) et l'obtention d'une autorisation distincte au Canada.
BT85x Series Datasheet 16 EUROPEAN UNION REGULATORY The BT85x has been tested for compliance with relevant standards for the EU market. BT850 module was tested with a 0.5 dBi chip antenna. The OEM should consult with a qualified test house before entering their device into an EU member country to make sure all regulatory requirements have been met for their complete device. Reference the Declaration of Conformities listed below for a full list of the standards that the modules were tested to.
BT85x Series Datasheet 17 ORDERING INFORMATION Part Number BT850-SA BT851 Description BTv4.2 Dual Mode USB HCI Module – Integrated Antenna BTv4.2 Dual Mode USB Dongle BT850-ST DVK-BT850-SA DVK-BT850-ST BTv4.2 Dual Mode USB HCI Module –External Antenna Development Kit for BT850-SA Module Development Kit for BT850-ST Module 17.1. General Comments This is a preliminary datasheet. Please check with Laird for the latest information before commencing a design. If in doubt, ask.
BT85x Series Datasheet Figure 22: Basic subsystem combination of a controller and host subsystem The Qualification Process requires each company to registered as a member of the Bluetooth SIG – http://www.bluetooth.org The following link provides a link to the Bluetooth Registration page: https://www.bluetooth.org/login/register/ For each Bluetooth Design it is necessary to purchase a Declaration ID. This can be done before starting the new qualification, either through invoicing or credit card payment.
BT85x Series Datasheet 19 ADDITIONAL ASSISTANCE Please contact your local sales representative or our support team for further assistance: Laird Technologies Connectivity Products Business Unit Support Centre: http://ews-support.lairdtech.com Email: wireless.support@lairdtech.com Phone: Europe: Hong Kong: Web: Americas: +1-800-492-2320 +44-1628-858-940 +852 2923 0610 http://www.lairdtech.com/bluetooth © Copyright 2017 Laird. All Rights Reserved. Patent pending.
