A Datasheet BT860 Bluetooth v4.2 Dual-Mode UART HCI Module Version 1.
BT860 Datasheet REVISION HISTORY Version 1.0 Date 04 Dec. 2017 Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth Notes Initial Release Approver Jacky Kuo 2 © Copyright 2017 Laird.
BT860 Datasheet CONTENTS 1 Scope ............................................................................................................................................................. 4 2 Operational Description ........................................................................................................................... 4 3 Block Diagram and Descriptions ............................................................................................................... 5 4 Specifications ..
BT860 Datasheet 1 SCOPE This document describes key hardware aspects of the Laird BT860 Bluetooth HCI module. This document is 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 a number of sources including data sheets for the CYW20704A2. Because the BT860 is currently in development stage, this document is preliminary and the information in this document is subject to change.
BT860 Datasheet 3 BLOCK DIAGRAM AND DESCRIPTIONS Figure 1: BT860 Module block diagram CYW20704A2 The BT860 is based on CYW20704A2 dual mode chip. The chip is a single-chip radio with on(Main chip) 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 I2S/PCM and USB interfaces.
BT860 Datasheet 4 SPECIFICATIONS Table 1: BT860 specifications Categories Wireless Specification Host Interface Operational Modes EEPROM Coexistence Supply Voltage Power Consumption Antenna Option Physical Feature Implementation Bluetooth® Frequency V4.2 Dual Mode Maximum Transmit Power Receive Sensitivity Range Class 1 +8 dBm from antenna -94 dBm Circa 100 meters Data Rates UART GPIO HCI UHE 2-wire Up to 3 Mbps (over-the-air) Up to 4 Mbps 3.
BT860 Datasheet Pin No. 8 Pin Name I/O RESET Input Supply Domain 3V3 9 3.
BT860 Datasheet 6 DC ELECTRICAL CHARACTERISTICS Table 3: Recommended operating conditions Rating Storage temperature Operating Temperature 3V3 Input Min -40 -30 3.0 Max +150 +85 3.6 Unit ⁰C ⁰C V Table 4: Digital I/O characteristics Normal Operation 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 IOL Output Low Current (VDDO = 3.3V, VOL = 0.4V) IOH Output Low Current (VDDO = 3.
BT860 Datasheet Parameter 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. Max BT. Spec. Unit - - -39 -20 dBm 100 10 152 - -47 - -40 +/-25 140<>175 99.9 dBm kHz kHz % 100 - 1.0 245 1.0 - ≧ 0.8 225<>275 99.9 0.8 kHz % ≧ Table 7: BDR/EDR/LE receiver sensitivity (Input = 3V3 @ 25° C) Parameter Sensitivity Sensitivity variation Conditions GFSK, 0.1% BER, 1Mbps π/4-DQPSK, 0.01% BER, 2Mbps 8-DPSK, 0.
BT860 Datasheet 8.2. UART Interface The BT860 shares a single UART for Bluetooth. The UART is a standard four-wire interface (RX, TX, RTS, and CTS) with adjustable baud rates from 38400 bps to 4.0 Mbps. The interface features an automatic baud rate detection capability that returns a baud rate selection. Alternatively, the baud rate may be selected through a vendor-specific UART HCI command. UART has a 1040-byte receive FIFO and 1040-byte transmits FIFO to support EDR.
BT860 Datasheet Table 10: UART timing specifications Reference Characteristics Min. Typ. Max. Unit 1 Delay time UART_CTS_N low to UART TXD valid - - 1.50 Bit periods 2 Setup time UART_CTS_N high before midpoint of stop bit - - 0.67 Bit periods 3 Delay time Midpoint of stop bit to UART_CTS_N high - - 1.33 Bit periods Figure 2: UART timing 8.3. PCM Interface The BT860 supports two independent PCM interfaces that share the pins with I2S interfaces.
BT860 Datasheet 8.3.2. Frame Synchronization The BT860 supports both short- and long-frame synchronization in both master and slave modes. In short-frame synchronization mode, the frame synchronization signal uses an active-high pulse at the audio frame rate that is a single-bit period in width and is synchronized to the rising edge of the bit clock. The PCM slave looks for a high on the falling edge of the bit clock and expects the first bit of the first slot to start at the next rising edge of the clock.
BT860 Datasheet Figure 4 and Table 12 shows PCM Timing Diagram and Specifications for the slave mode of short-frame. Figure 4: PCM timing diagram (Short-Frame Sync, Slave Mode) Table 12: PCM Interface timing specifications (Short-Frame Sync, Slave Mode) Reference Characteristics Min. Typ. Max.
BT860 Datasheet Figure 5 through Table 13 shows PCM Timing Diagram and Specifications for the master mode of long-frame. Figure 5: PCM timing diagram (Long-Frame Sync, Master Mode) Table 13: PCM Interface timing specifications (Long-Frame Sync, Master Mode) Reference Characteristics Min. Typ. Max.
BT860 Datasheet Figure 6 and Table 14 shows PCM Timing Diagram and Specifications for the slave mode of long-frame Figure 6: PCM timing diagram (Long-Frame Sync, Slave Mode) Table 14: PCM Interface timing specifications (Long-Frame Sync, Slave Mode) Reference Characteristics Min. Typ. Max.
BT860 Datasheet 8.3.4. Wideband Speech Support When the host encodes Wideband Speech (WBS) packets in transparent mode, the encoded packets are transferred over the PCM bus for an eSCO voice connection. In this mode, the PCM bus is typically configured in master mode for a 4 kHz sync rate with 16-bit samples, resulting in a 64 Kbps bit rate. The BT860 also supports slave transparent mode using a proprietary rate-matching scheme.
BT860 Datasheet Figure 8: PCM Burst Mode timing (Receive Only, Short Frame Sync) Table 15: PCM Burst Mode Specifications (Receive Only, Short-Frame Sync) Reference Characteristics Min. Typ. Max. Unit 1 PCM bit clock frequency - - 24 MHz 2 PCM bit clock LOW 20.8 - - ns 3 PCM bit clock HIGH 20.
BT860 Datasheet Table 16: PCM Burst Mode Specifications (Receive Only, Long-Frame Sync) Reference Characteristics Min. Typ. Max. Unit 1 PCM bit clock frequency - - 24 MHz 2 PCM bit clock LOW 20.8 - - ns 3 PCM bit clock HIGH 20.8 - - ns 4 PCM_SYNC setup 8 - - ns 5 PCM_SYNC_hold 8 - - ns 6 PCM_IN setup 8 - - ns 7 PCM_IN hold 8 - - ns 8.4. I2S Interface The BT860 supports two independent I2S digital audio ports.
BT860 Datasheet 8.4.1. I2S Timing Timing values specified in Table 17 are relative to high and low threshold levels. Table 17: Timing for I2S Transmitters and Receivers Transmitter Lower Limit Upper Limit Min Max Min Max Clock Period T HIGH tHC LOW tLC HIGH tHC Receiver Lower Limit Upper Limit Min Max Min Max Ttr Tr Master Mode: Clock generated by transmitter or receiver 0.35Ttr 0.35Ttr 0.35Ttr 0.35Ttr Master Mode: Clock generated by transmitter or receiver 0.35Ttr 0.
BT860 Datasheet 2 Figure 11: I S Receiver Timing 8.5. BSC (Cypress Serial Control) Master Interface BT860 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. Multiple I2C master devices and flexible wait state insertion by the master interface or slave devices are not supported. The BT860 provides 400 kHz, full speed clock support.
BT860 Datasheet Table 18: BSC Interface Timing Specifications 9 Reference Characteristics Min. 1 Clock frequency - 2 3 4 5 6 7 8 9 10 START condition setup time START condition hold time Clock low time Clock high time Data input hold time Data input setup time STOP condition setup time Output valid from clock Bus free time 650 280 650 280 0 100 280 650 Max.
BT860 Datasheet Figure 14: Antenna pattern Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 22 © Copyright 2017 Laird.
BT860 Datasheet 10 MECHANICAL DIMENSIONS AND LAND PATTERN 10.1. BT860 Mechanical Drawing Dimensions from corner of BT860 Pin1 Note: Dimensions are in millimetres. Tolerances: .xx ±0.03 mm .x ±1.3 mm Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 23 © Copyright 2017 Laird.
BT860 Datasheet 11 IMPLEMENTATION NOTE 11.1. PCB Layout on Host PCB Checklist (for PCB): MUST locate the BT860 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.
BT860 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.
BT860 Datasheet Figure 17: Reel specifications Figure 18: Tape specifications There are 2500 BT860 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 19. Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 26 © Copyright 2017 Laird.
BT860 Datasheet 12.2.3. Packaging Process Figure 19: BT860 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.
BT860 Datasheet Temperatures should not exceed the minimums or maximums presented in Table 20. Table 20: 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 .
BT860 Datasheet 14 FCC REGULATORY Model BT860-SA BT860-ST US/FCC SQGBT850 SQGBT850 CANADA/IC DVK-BT860-SA DVK-BT860-ST 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 5 Part Number AT3216-B2R7HAA 001-0030 mFlexPIFA 001-0014 FlexPIFA 0600-00040 NanoBlue MAF94045 Mfg. ACX LAIRD LAIRD LAIRD LAIRD Type Ceramic PIFA PIFA Dipole PCB Dipole Gain (dBi) 0.5 2 2 2 2 14.1.
BT860 Datasheet 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.
BT860 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.
BT860 Datasheet NOTE IMPORTANTE: 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.
BT860 Datasheet 16.1. EU Declarations of Conformity Manufacturer Laird Products BT860-SA and BT860-ST Product Description Bluetooth v4.2 Class 1 UART HCI EU Directives 2014/53/EU – Radio Equipment Directive (RED) Reference standards used for presumption of conformity: Article Number Requirement Low voltage equipment safety 3.1a RF Exposure 3.1b 3.
BT860 Datasheet 18 BLUETOOTH SIG APPROVALS 18.1. Application Note: Subsystem Combinations This application note covers the procedure for generating a new Declaration ID for a Subsystem combination on the Bluetooth SIG website. In the instance of subsystems, a member can combine two or more subsystems to create a complete Bluetooth End Product solution. Subsystem listings referenced as an example: Design Name Owner Declaration ID Link to listing on the SIG website BT860-SA Laird B021369 https://www.
BT860 Datasheet For a detailed procedure of how to obtain a new Declaration ID for your design, please refer to the following SIG document: https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=283698&vId=317486 To start the listing, go to: https://www.bluetooth.org/tpg/QLI_SDoc.cfm. In step 1, select the option, Reference a Qualified Design and enter the Declaration IDs of each subsystem used in the End Product design.
