LSTD DVK-BT730-SC Module from laird technologies is designed to add robust, long-range bluetooth data connectivity to any device Datasheet

A
Datasheet
BT730 Class 1 Bluetooth v2.0 Module
Version 1.6
Part # BT730-SA, BT730-SC
BT730
Datasheet
REVISION HISTORY
Version
1.0
Date
19 June 2013
Notes
Initial Release
Approver
Jonathan Kaye
Replaced “PCB Land Pattern and Antenna Keepout for BT730-SA” image
Fixed incorrect text
Updated table captions
Removal of OBEX Client
Updated Bluetooth SIG Approvals
Jonathan Kaye
1.1
23 June 2013
1.2
30 August 2013
1.3
1.4
30 Sept 2013
06 Feb 2014
Updated BT730-SA placement on host PCB image
Updated Bluetooth SIG Qualification section
Jonathan Kaye
Jonathan Kaye
1.5
15 Aug 2016
Sue White
1.6
19 Sept 2016
Changed from Hardware Integration Guide to
Datasheet.
Updated EU Declaration of Conformity
Embedded Wireless Solutions Support Center:
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© Copyright 2015 Laird. All Rights Reserved
Jonathan Kaye
Sue White
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Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT730
Datasheet
CONTENTS
Features & Benefits ............................................................................................................................................5
Application Areas ...............................................................................................................................................5
Bluetooth Profiles Support .................................................................................................................................5
1
Specifications......................................................................................................................................................6
2
Hardware Specifications.....................................................................................................................................8
2.1
Block Diagram and Pin-out ....................................................................................................................8
2.2
Pin Definitions ........................................................................................................................................9
2.2.1
2.3
3
4
Electrical Specifications....................................................................................................................... 11
2.3.1
Absolute Maximum ratings ................................................................................................. 11
2.3.2
Recommended Operating Parameters ................................................................................ 11
IO Characteristics ............................................................................................................................................ 13
3.1
Power Consumption ........................................................................................................................... 13
3.2
Typical Current Consumption in mA ................................................................................................... 13
Functional Description .................................................................................................................................... 14
4.1
UART Interface .................................................................................................................................... 14
4.2
SPI Bus ................................................................................................................................................. 15
4.3
PCM Interface ..................................................................................................................................... 15
4.3.1
4.4
4.5
5
Compatible Codec Chips ...................................................................................................... 15
General Purpose I/O and ADC............................................................................................................. 15
4.4.1
GPIO ..................................................................................................................................... 15
4.4.2
ADC ...................................................................................................................................... 15
BT730-SA On-board Chip Antenna Characteristics ............................................................................. 16
Hardware Integration Suggestions .................................................................................................................. 16
5.1
Circuit .................................................................................................................................................. 16
5.2
PCB Layout on Host PCB - General ...................................................................................................... 16
5.3
PCB Layout on Host PCB for BT730-SA ............................................................................................... 17
5.4
6
COMPATIBILITY NOTE FOR LEGACY DEVICES ...................................................................... 10
5.3.1
Antenna keep-out on host PCB ........................................................................................... 17
5.3.2
Antenna Keep-out and Proximity to Metal or Plastic .......................................................... 18
External Antenna Integration with BT730-SC ..................................................................................... 19
Mechanical Details .......................................................................................................................................... 20
6.1
BT730-SC Mechanical Details.............................................................................................................. 20
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BT730
Datasheet
7
8
6.2
BT730-SA Mechanical Details ............................................................................................................. 20
6.3
BT730 Pad Definitions – Mechanical Drawing .................................................................................... 21
6.4
PCB Land Pattern and Antenna Keep-out for BT730-SA ..................................................................... 22
Application Note for Surface Mount Modules ................................................................................................ 23
7.1
Introduction ........................................................................................................................................ 23
7.2
Shipping............................................................................................................................................... 23
7.3
Reflow Parameters.............................................................................................................................. 24
Regulatory Statements .................................................................................................................................... 25
8.1
FCC ...................................................................................................................................................... 25
8.2
Power Exposure Information .............................................................................................................. 25
8.3
OEM Responsibilities .......................................................................................................................... 26
8.4
Industry Canada (IC) Warning: ............................................................................................................ 27
8.5
CE Regulatory ...................................................................................................................................... 28
9
EU Declaration of Conformity ......................................................................................................................... 29
10
Bluetooth SIG Qualification ............................................................................................................................. 30
10.1
11
Additional Assistance .......................................................................................................................... 30
Ordering Information ...................................................................................................................................... 31
11.1
General Comments ............................................................................................................................. 31
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BT730
Datasheet
OVERVIEW AND KEY FEATURES
Every BT730 series Bluetooth® module from Laird Technologies is designed to add robust, long-range Bluetooth
data connectivity to any device. Based on the market-leading Cambridge Silicon Radio (CSR) BC04 chipset, BT730
modules provide exceptionally low power consumption with outstanding Class 1 range via 18 dBm of transmit
power. A broad range of Bluetooth profiles and other vital features make BT730 modules superior to other
Bluetooth modules.
With a compact footprint of 15.29 x 28.71 mm, the modules deliver maximum range with minimum size.
Another integration advantage is the inclusion of a complete Bluetooth v2.0 protocol stack with support for
multi-point connections and numerous Bluetooth profiles including Serial Port Profile (SPP), Dial Up Networking
(DUN), FTP Client plus partial support for Headset (HSP) and HandsFree (HFP). BT730 modules are fully qualified
as Bluetooth end products, enabling designers to integrate the modules in devices without the need for further
Bluetooth qualification.
An integrated AT command processor interfaces to the host system over a serial port using an extensive range of
AT commands. The AT command set abstracts the Bluetooth protocol from the host application, saving many
months of programming and integration time. It provides extremely short integration times for data oriented
Bluetooth applications.
The included firmware provides programming support for multi-point applications that use up to three
simultaneous data connections to and from the robust BT730 module. A low-cost developer’s kit makes it easy
for an OEM to integrate the module and guarantees the fastest route to prototype and then mass production.
Features & Benefits









Application Areas
Bluetooth v2.0
External or internal antennas
Comprehensive AT command set
Bluetooth EPL
Compact footprint
Class 1 output - 18dBm
UART interface with GPIO,
PCM, and ADC lines
Industrial temperature range
Field proven firmware used on
BTM40x and BISM II product ranges
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless





Medical devices
ePOS terminals
Automotive diagnostic equipment
Barcode scanners
Industrial cable replacement
Bluetooth Profiles Support




Serial Port Profile (SPP)
Dial Up Networking (DUN)
FTP Client
partial support for Headset (HSP) and Hands
Free (HFP)
5
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BT730
Datasheet
1 SPECIFICATIONS
Detailed Specifications
Table 1-1: Detailed specifications
Categories
Wireless Specification
Feature
Bluetooth®
Frequency
Bluetooth Transmitter Class
Max Transmit Power
Implementation
V2.0
2.402 - 2.480 GHz
Class 1 (Basic Rate BT)
18 dBm into integrated antenna (BT730-SA)
16 dBm into UFL antenna connector (BT730-SC)
-9 dBm into integrated antenna
-9 dBm into UFL antenna connector
Better than -87 dBm (at 25°C)
Up to 1000m (Line of Sight)
Up to 1.0 Mbps (over the air)
Circa 300 kbps
One UART
TX, RX, DCD, RI, DTR, DSR, CTS, RTS1
Default 9600, n,8, 1
From 1,200 to 921,600 bps
8 configurable lines
Two ADC channels,
8 bit resolution
One PCM interface – see Audio section
PCM_CLK, PCM_IN, PCM_SYNC, PCM_OUT
Serial Port Profile
Dial Up Networking
File Transfer Client Profile
Hands Free & Headset
AT Command Set
Multi-Point API - 3 simultaneous connections
Firmware Upgrade over UART
3 x PCM Channels @ 64 kpbs
SCO and eSCO
Configurable as master or slave
8 bit A-law
8 bit µ-law
13 bit linear
PCM Clock available when in slave mode
3.3 – 5.0 V
On-board regulators and brown-out detection.
GPIO voltages are 3.3V logic.
Min Transmit Power
Host Interface
Receive Sensitivity
Range
Data Rates
UART Data Transfer Rate
UART
GPIO
ADC
PCM
Profiles
Command Interfaces
SPP
DUN
FTP Client
HFP & HSP (Audio Gateway)
Operation Modes
Firmware Upgrade
Audio
Support
SCO Channels
PCM Interface
Supply Voltage
Supply
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BT730
Datasheet
Power Consumption
Various Modes –
Typical values
(see Power Consumption
section for test conditions)
Antenna Options
Internal
External
Connections
Dimensions
Weight
Operating
Storage
Lead Free
Warranty
Development Kit
Bluetooth®
FCC / IC / CE
Physical
Environmental
Miscellaneous
Development Tools
Approvals
Idle mode
1.25 mA
Discoverable
2.7 mA to 55 mA
Inquiry mode
65 mA
Connecting mode
66 mA
Connected mode
6 mA
(no data transfer)
Connected mode
35 mA
(max data transfer)
Sniff mode
1.8 mA
Multilayer ceramic chip - BT730-SA
Connection via u.FL - BT730-SC
Surface Mount Pads (1.2mm pitch)
15.29 mm x 28.71 mm x 2.5 mm
1.5 g
-40°C to +85°C
-40°C to +85°C
Lead-free and RoHS compliant
5-Year Limited Lifetime
Development kit DVK-BT730 and software tools
End Product Listing (EPL)
All BT730 Series
DSR, DTR, RI and DCD are configurable either as GPIO or as modem control lines.
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BT730
Datasheet
2 HARDWARE SPECIFICATIONS
2.1
Block Diagram and Pin-out
Ceramic Chip
Antenna OR
UFL RF connector
Figure 1: Functional Block Diagram
Figure 2: BT730-Sx module pin-out (Top View)
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BT730
Datasheet
2.2
Pin Definitions
Table 2-1: Pin definitions
Pin
1
2
3
4
5
6
7
8
Signal
GND
SPI_MOSI
GPIO6
GPIO7
nRESET
SPI_CLK
PCM_CLK
PCM_SYNC
Description
Comment
SPI bus serial I/P
I/O for host
I/O for host
Module reset I/P
SPI bus clock I/P
PCM clock I/P
PCM sync I/P
See Note 2
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
PCM_IN
PCM_OUT
VCC_IN
GND
VCC_3V3_monitor
Analogue 1
GND
UART_DSR
UART_DCD
GPIO_9
GPIO_8
GND
Analogue 0
UART_RX
UART_TX
UART_RTS
UART_CTS
NC (Reserved USB_D+)
PCM data I/P
PCM Data O/P
3.3 V < VCC_IN < 5.0 V
27
28
NC (Reserved USB_D-)
UART_RI
Not used for AT module variants
Ring Input or Output
29
30
31
32
33
GPIO_3/UART_DTR
GPIO_5
GPIO_4
SPI_CSB
SPI_MISO
I/O for host/UART_DTR
I/O for host
I/O for host
SPI bus chip select I/P
SPI bus serial O/P
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3.3 V Monitor (do not connect)
1.8 V max
See Note 3
See Note 2
See Note 4
See Note 5
UART_DSR I/P
UART_DCD I/P or O/ P
I/O for host
I/O for host
1.8 V max
Receive data I/P
Transmit data O/P
Request to Send O/P
Clear to Send I/P
Not used for AT module variants
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See Note 2
See Note 2
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BT730
Datasheet
Notes:
1. Unused pins may have internal connections and must not be connected.
2. Pins 2, 6, 32, and 33 (SPI related) are only for Laird internal production purposes.
3. Power-on-reset (power cycling and brown out consideration) – The reset circuitry within the BT730
module incorporates a brown-out detector; this may simplify power supply design. The BT730 reset
line is an active low input (Input debounced so must be low for more than 5 ms to cause a reset).
Upon the application of power, the Power On Reset circuit built into the module ensures that the unit
starts correctly. There is no need for an external power reset monitor.
4. Power Supply Consideration – The power supply for the module should be a single voltage source of
VCC within the VCC_IN range of 3.3 V to 5.0 V. It must be able to provide sufficient current in a
transmit burst. This can rise to 200 mA. To limit dissipation it is recommended that you use a voltage
at the lower end of the range.
5. The module includes regulators to provide internal local 3.3 V. This rail is accessible on pin 13 for
monitoring purposes only. Under no circumstances should this pin be used to source current.
2.2.1 COMPATIBILITY NOTE FOR LEGACY DEVICES
If Reset compatibility is required with BTM402 and BTM404: Reset logic must be inverted (on the host PCB), by
using suitable BJT (MMBT3904) with collector connected to Reset pin BT730 module pin 5. A fixed 10k Ohm pull
down resistor to ground (BJT input) then ensures that the BT730 module is out of reset for the condition when
host has yet to control the reset line.
Add a 10 k pull-up to the host PCB on the UART_RX, or the module remains in deep sleep if not driven to high.
Add a 10 k pull-down to the host PCB on the UART_CTS that if it is not connected (which we do not recommend)
then the default state for UART_CTS input will be asserted which means can send data out of UART_TX line.









GPIO lines can be configured through software to be either inputs or outputs with weak or strong pull-ups
or pull-downs. At reset, all GPIO lines are configured as inputs with weak pull-downs.
UART_RX, UART_TX, UART_CTS, UART_RTS, UART_RI, UART_DCD, and UART_DSR are 3.3 V level logic. For
example, when RX and TX are idle they sit at 3.3 V. Conversely, for handshaking pins CTS, RTS, RI, DCD, and
DSR, a 0 V is treated as an assertion.
Pin 28 (UART_RI) is active low. It is normally 3.3 V. When a remote device initiates a connection, this pin
goes low. When this pin is converted to RS232 voltage levels, it has the correct voltage level for assertion.
Pin 17 (UART_DCD) is active low. It is normally 3.3 V. When a connection is live, this pin is low. This means
that when this pin is converted to RS232 voltage levels it has the correct voltage level for assertion.
Pin 16 (UART_DSR) is an input, with active low logic. It should be connected to the DTR output of the host.
When the BTM730 module is in high speed mode (see S Register 507 in the Firmware User manual), this pin
should be asserted by the host to ensure that the connection is maintained. A deassertion means that the
connection should be dropped or an online command mode is being requested.
Pin 13 (VCC_3V3 monitor) may only be used for monitoring (must not be used as a current source).
The GPIO pins can be accessed using S Registers 623 to 629.
GPIO3 is also used for DTR output (active low). See S Register 552 and 553 in the Firmware User manual.
Analogue 0 and 1 should not exceed 1.8 V and S Registers 701 and 702 are used to access them.
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BT730
Datasheet
2.3
Electrical Specifications
2.3.1 Absolute Maximum ratings
Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the module are listed
below; exceeding these values will cause permanent damage.
Table 2-2: Absolute Maximum Ratings
Parameter
Peak current of power supply
Voltage at digital pins
Voltage at POWER pin
Min
0
-0.4
2.9
Max
200
3.7
6.0
Unit
mA
V
V
2.3.2 Recommended Operating Parameters
Table 2-3: Power Supply
Signal Name
VCC_IN
Pin No
11
I/O
I
GND
1, 12, 15, 20
VCC_3V3_monitor
13
Note:
O
Voltage level
3.3 V to 5.0 V *
Typ 3.5 V
3.3 V typical
Comments
Ityp = 115 mA
Four (4) ground terminals to be attached in
parallel.
For monitoring only. No current source.
VCC_3V3_monitor refers to internal voltage generated by the LDO inside the module which is typically
3.3 V. So to achieve 3.3 V for VCC_3V3_monitor (at Max Tx Power) requires VCC_IN of 3.5 V. IO
voltage levels follows VCC_3V3_monitor. At minimum VCC_VIN of 3.3 V, the internal LDO generates
3.3 V but when Radio Tx at max Tx power, VCC_3V3_monitor drops a little (to ~3.15 V).
Table 2-4: Signal Levels for Interface, PCM, SPI, and GPIO
Signal Type
Input
Signal level
VILmin= -0.4 V
VILmax=0.8 V
VIHmin=2.3 V
VIHmax=3.7 V
Output
Signal level @ 0 mA load
VOLmax=0.2 V
VOHmin=3.1 V
Table 2-5: UART Interface
Signal Name
UART_TX
UART_RX
UART_CTS
UART_RTS
UART_DSR
UART_DTR
UART_RI
UART_DCD
Pin No
23
22
25
24
16
29
28
17
I/O
O
I
I
O
I
O
I or O
I or O
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Comments
Shared with GPIO3
Direction may be programmed.
Direction may be programmed.
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BT730
Datasheet
Table 2-6: SPI Bus
Signal Name
SPI_MOSI
Pin No
2
I/O
I
SPI_MISO
SPI_CSB
33
32
O
I
SPI_CLK
6
I
Comments
Laird INTERNAL USE ONLY - Used to reprogram Flash in Laird
production.
Table 2-7: PCM Interface
Signal Name
PCM_CLK
PCM_IN
PCM_SYNC
PCM_OUT
Pin No
7
9
8
10
I/O
I or O
I
I or O
O
Comments
If unused keep pins open.
PCM output signals are tri-stated when there is not an active
SCO or eSCO connection.
Table 2-8: General Purpose I/O and ADC
Signal Name
GPIO_3 - 9
Pin No
3, 4, 16, 17, 18, 19, 29,
30, 31
I/O
I or O
Signal level
See 3.3.2.2
Comments
Analogue0, Analogue1
14, 21
I
Range 0 – 1.8 V
8 bit
Table 2-9: Miscellaneous
Signal Name
nRESET
Pin No
5
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I/O
I
Signal level
VILmax=1.0V
VIHmin=2.3V
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Comments
Active LOW. The Reset input
contains a 10 kΩ pull-up resistor
(internal to module).
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BT730
Datasheet
3 IO CHARACTERISTICS
3.1
Power Consumption
The current drain from the VCC power input line is dependent on various factors. The three most significant
factors are the voltage level at VCC, UART baud rate, and the operating mode. The hardware specification for
the module allows for a voltage range of 3.3 to 5.0 at VCC. The unit includes a linear regulator and tests have
shown that there is no significant difference in current draw when VCC changes within the operating limits.
Tests have shown that where power dissipation is an issue, it is best to keep VCC at the lower end of the range.
The UART baud rate has a bearing on power dissipation because, as is normal for digital electronics, the power
requirements increase linearly with increasing clocking frequencies. Because of this, higher baud rates result in a
higher current drain. Finally, the significant operating modes are: idle, waiting for a connection, inquiring,
initiating a connection, sniff, and connected. With connected mode, it is also relevant to differentiate between
no data being transferred and when data is being transferred at the maximum rate possible. The AT command
set document describes how to configure the module for optimal power performance.
3.2
Typical Current Consumption in mA
Table 3-1: Current Consumption
VCC_IN = 3.8 V, Baudrate = 9600 bps
Separation Distance = 15 meters
Idle Mode, S512=1
Wait for Connection Or Discoverable Mode,
AT+BTP
S508=S510=640, S509=S511=320
Typical Average Current (mA)
Wait for Connection Or Discoverable Mode,
AT+BTP
S508=S510=1000, S509=S511=11
Inquiry Mode, AT+BTI
Connecting Mode (ATDxxx)
Connected Mode (No Data Transfer)
Connected Mode (Max Data Transfer)
Sniff Mode
S564=1000, S563=500, S562=50, S561=10
2.7 mA
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1.25 mA
55 mA
65 mA
66 mA
6 mA
35 mA
1.8 mA
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BT730
Datasheet
4 FUNCTIONAL DESCRIPTION
The BT730 Bluetooth module is a self-contained Bluetooth product and requires only power to implement full
Bluetooth communication. The integrated, high performance antenna, together with the RF and base-band
circuitry, provides the Bluetooth wireless link; the UART interface provides a connection to the host system.
The variety of interfaces and the AT command set allow the BT730 module to be used for a wide variety of long
range wireless applications, from simple cable replacement to complex multipoint applications, where multiple
radio links are active at the same time.
The complexity and flexibility of configuration are made simple for the design engineer by the integration of a
comprehensive set of AT commands, supplemented with a range of “S” registers which are used for non-volatile
storage of system parameters.
To provide the widest scope for integration, a range of different physical host interfaces are provided.
4.1
UART Interface
UART_TX, UART_RX, UART_RTS, and UART_CTS form a conventional asynchronous serial data port with
handshaking. The interface is designed to operate correctly when connected to other UART devices such as the
16550A. The signalling levels are nominal 0 V and 3.3 V and are inverted with respect to the signalling on an
RS232 cable. The interface is programmable over a variety of bitrates; no, even, or odd parity; stop bit and
hardware flow control. The default condition on power-up is pre-assigned in the external flash. Two-way
hardware flow control is implemented by UART_RTS and UART_CTS. UART_RTS is an output and is active low.
UART_CTS is an input and is active low.
These signals operate according to normal industry convention. UART_RX, UART_TX, UART_CTS, UART_RTS,
UART_RI, UART_DCD, and UART_DSR are all 3.3 V level logic. For example, when RX and TX are idle, they sit at
3.3 V. Conversely for handshaking pins CTS, RTS, RI, DCD, and DSR, a 0 V is treated as an assertion.
By writing different values to the relevant S register, the UART_RI can be continuously polled to detect incoming
communication. The UART_RI signal serves to indicate incoming calls.
UART_DSR is an active low input. It should be connected to DTR output of the host. When the module is running
in high speed mode (see definition for S Reg 507 in the Firmware User manual), this pin should be asserted by
the host to ensure connection is maintained. A de-assertion means that the connection should be dropped or an
online command mode is being requested.
The module communicates with the customer application using the following signals:


Port /TXD of the application sends data to the module’s UART_RX signal line
Port /RXD of the application receives data from the module’s UART_TX signal line
BT730
Application - Host
UART_TX
/RXD
UART_RX
/TXD
UART_CTS
/RTS
UART_RTS
/CTS
UART_DSR
/DTR
UART_DTR
/DSR
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BT730
Datasheet
Note:
The serial module output is at 3.3 V CMOS logic levels. Level conversion must be added to interface
with an RS-232 level compliant interface.
Some serial implementations link CTS and RTS to remove the need for handshaking. Laird does not recommend
linking CTS and RTS other than for testing and prototyping. If these pins are linked and the host sends data at the
point that the BT730 deasserts its RTS signal, then there is a significant risk that internal receive buffers will
overflow; this could lead to an internal processor crash. This also leads to a drop in connection and may require
a power cycle to reset the module. Laird recommends that the correct CTS/RTS handshaking protocol be
followed for proper operation.
4.2
SPI Bus
The module is a slave device that uses terminals SPI_MOSI, SPI_MISO, SPI_CLK, and SPI_CSB. This interface is
used for program firmware updates ONLY at the factory. Laird supplies a PC-based utility to allow a firmware
upgrade over the UART port. It is highly recommended that customers use the UART method for updating
firmware.
Note:
4.3
The designer should be aware that no security protection is built into the hardware or firmware
associated with this port, so the terminals should not be permanently connected in a PC application.
PCM Interface
PCM_OUT, PCM_IN, PCM_CLK, and PCM_SYNC carry up to three bi-directional channels of voice data, each at 8
k samples/s. The format of the PCM samples can be 8-bit A-law, 8-bit μ-law, 13-bit linear, or16-bit linear. The
PCM_CLK and PCM_SYNC terminals can be configured as inputs or outputs, depending on whether the module is
the master or slave of the PCM interface. Please contact a Laird FAE for further details.
The module is compatible with the Motorola SSI TM interface and interfaces directly to PCM audio codec chips
including the following:
4.3.1 Compatible Codec Chips
OKI 7702 single channel A-law and μ-law CODEC
Winbond W681360 13 bit linear CODEC
4.4
General Purpose I/O and ADC
4.4.1 GPIO
Seven lines of programmable bi-directional input/outputs (I/O) are provided that can be accessed either via the
UART port or Over-the-Air (OTA) from a second Bluetooth unit. These can be used as data inputs or to control
external equipment. By using these in OTA mode, a BT730 module can be used for control and data acquisition
without the need for any additional host processor. Each of the GPIO[3:9] ports can be independently
configured to be either an input or output. A selection of ports can be accessed synchronously.
The ports are powered from internal VCC_3V3. The mode of these lines can be configured and the lines are
accessed via S Registers 623 to 629.
4.4.2 ADC
The BT730 provides access to two 8-bit ADCs (Analogue 0 and 1). These provide an input range of 0 mV to 1,800
mV, which can be read using the S registers 701 and 702.
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Suitable external scaling and over-voltage protection should be incorporated in your design. The module
provides five samples per second at the UART with a baud rate of 115,200 or above.
4.5
BT730-SA On-board Chip Antenna Characteristics
The BT730-SA on-board chip monopole antenna radiated performance depends on the host PCB layout.
BT730 carrier board was used for BT730-SA development and antenna performance evaluation. To obtain
similar performance, follow the guidelines in PCB Layout on Host PCB for BT730-SA to allow the on-board
antenna to radiate and reduce proximity effects due to nearby host PCB GND copper or metal covers.
BT730-SA on-board antenna datasheet can be accessed from the following link:
http://www.acxc.com.tw/product/at3216/AT3216-B2R7HAA_071204.pdf
5 HARDWARE INTEGRATION SUGGESTIONS
5.1
Circuit
The BT730 series module is easy to integrate requiring no external components on the customer’s board apart
from those required by customer for development and in customer’s end application.
Checklist (for the schematic):






5.2
VCC_IN: External power source within the operating range specification of BT730-Sx. Add decoupling (or
bulk) capacitors for filtering (or reservoir) the external source. Power-on reset circuitry within BT730-Sx
series module incorporates brown-out detector, thus simplifying power supply design. Upon application of
power, the internal power-on reset ensures module starts correctly.
AIN (ADC) and GPIO (or UART) pin IO voltage levels: BT73-Sx GPIO voltage levels are at VCC_3V3_monitor
pin (see section 2.3). Ensure input voltage levels into GPIO pins are at VCC_3V3 _monitor voltage levels.
Ensure ADC pin maximum input voltage (1.8 V) for damage is not violated.
UART: Is required. Add connector to allow UART to be interfaced to PC (via UART –RS232 or UART- USB).
UART_RX and UART_CTS: Add a 10 k pull-up to the host PCB on the UART_RX, otherwise the module
remains in deep sleep if not driven to high. The pull-up prevents the module from going into deep sleep
when UART_RX line is idling.
Add a 10 k pull-down to the host PCB on the UART_CTS that, if it is not connected (which we do not
recommend) then the default state for UART_CTS input will be asserted which means can send data out of
UART_TX line.
nRESET pin (active low): Hardware reset. Wire out to push button or drive by host. If used external reset
must be exerted for a minimum of 5 mS. By default, the module is out of reset when power is applied to the
VCC pin.
PCM: All four PCM signals are routed directly from chipset to external BT730-Sx module pins. It is then up
to customer to configure appropriately. A 4.7 k pull down resistor to ground on PCM_OUT may help resolve
audio noise problems when chipset PCM_OUT line tristates.
PCB Layout on Host PCB - General
Checklist (for PCB):



MUST locate the BT730-SA module close to the edge of PCB (mandatory for BT730-SA for on-board chips
antenna to radiate properly).
Use solid GND plane on inner layer (for best EMC and RF performance).
Place GND vias as close to module GND pads as possible.
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


5.3
Unused host PCB area on surface layer can be flooded with copper but place GND vias regularly to connect
copper flood to inner GND plane. If GND flood copper underside the module then connect with GND vias to
inner GND plane.
Route traces to avoid noise being picked up on VCC_IN supply, Analogue and GPIO (digital) traces.
Ensure there is no exposed copper on the underside of the module (refer to land pattern drawing of BT730Sx).
PCB Layout on Host PCB for BT730-SA
5.3.1 Antenna keep-out on host PCB
The BT730-SA has an integrated chip antenna and its performance is sensitive to the host PCB. It is critical to
locate the BT730-SA on the edge of the host PCB (or corner) for proper radiation. Refer to guidelines in the
section PCB Land Pattern and Antenna Keep-out area for BT730-SA. Some guidelines are repeated below.




Ensure there is no copper in the antenna keep-out area on any layers of the host PCB. Keep all mounting
hardware and metal clear of the area to allow proper antenna radiation.
For best antenna performance, place the BT730-SA module on the edge of the host PCB, preferably in the
corner with the antenna facing the corner. An example shown in Figure 3.
A different host PCB thickness dielectric will have small effect on antenna (the BT730 carrier development
board (used for antenna performance evaluation) thickness was 0.78 mm).
The antenna-keep-out defined in PCB Land Pattern and Antenna Keep-out area for BT730-SA applies when
the BT730-SA is placed in the corner of the host PCB. When BT730-SA cannot be placed as such, it must be
placed on the edge of the host PCB and a modified antenna keep out must be observed. This antenna
keep-out modification is shown in Figure 4 (antenna keep-out is extended by 8 mm on both sides).
Figure 3: BT730-SA placement in the corner of host PCB.
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Figure 4: BT730-SA placement in the edge (not corner) of host PCB (with modified antenna keep-out).
Note:
Copper cut-away on all layers in “antenna keep-out” area under BT730-SA module on host PCB. Refer
to “antenna keep-out” defined in section 6.4 PCB Land Pattern and Antenna Keep-out for BT730-SA.
5.3.2 Antenna Keep-out and Proximity to Metal or Plastic
Checklist (for metal /plastic enclosure):





Figure 5 and Figure 6 show the recommended and not recommended locations for metal with respect to a
BT730-SA module on-board antenna.
Minimum safe distance for metals without seriously compromising the antenna (tuning) is 40 mm
top/bottom and 30 mm left or right.
Metal close to the BT730-SA chip monopole antenna (bottom, top, left, right, any direction) will have
degradation on the antenna performance. The amount of degradation is entirely system dependent which
means some testing by customer is required (in their host application).
Anything metal closer than 20 mm starts to significantly degrade performance (S11, gain, radiation
efficiency).
It is best that the customer tests the range with a mock-up (or actual prototype) of the product to assess
effects of enclosure height (and material, whether metal or plastic).
Figure 5: Recommended BT730-SA placement on host PCB and proximity to metal cover
Figure 6: Not recommended BT730-SA placement on host PCB and proximity to metal cover
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5.4
External Antenna Integration with BT730-SC
Refer to the regulatory sections for FCC, IC, and CE, for details of use of BT730-SC with external antennas in each
regulatory region.
The BT730-SC family has been designed to operate with the antennas listed below with a maximum gain of 2
dBi. The required antenna impedance is 50 ohms.
External antennas improve radiation efficiency.
Item
1
2
Part Number
MAF94045
WRR2400- IP04B(MAF94019)
Mfg.
Laird
Laird
Type
Gain (dBi)
Internal
2
Dipole
1.5
Connector Type
UFL
UFL
3
4
WTC2450-IP04-K(MAF94006)
S181FL-L-RMM-2450S
Laird
Nearson
(Laird)
Dipole
Dipole
UFL
UFL
Note 1:
2
2
Integral RF co-axial cable with UFL connector.
Antenna manufacturer Laird contact information:
Email: [email protected]
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6 MECHANICAL DETAILS
6.1
BT730-SC Mechanical Details
Figure 7: BT730-SC mechanical details
6.2
BT730-SA Mechanical Details
Figure 8: BT730-SA mechanical details
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6.3
BT730 Pad Definitions – Mechanical Drawing
Figure 9: BT7xx Mechanical Drawing
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6.4
PCB Land Pattern and Antenna Keep-out for BT730-SA
Unit is mm.
Figure 10: PCB Land Pattern and Antenna Keep-out for BT730-SA
APPLICATION NOTES
1.
Ensure there is no copper in the antenna ‘keep out area’ on any layers of the host PCB. Also keep all
mounting hardware or any metal clear of the area to reduce effects of proximity detuning the antenna
and to help antenna radiate properly. Refer to section 5.3.2 for more information.
2.
For BT730-SA (with on-board chip antenna) best antenna performance, the module BT730-SA must be
placed on the edge of the host PCB and preferably in the corner with the antenna facing the corner
(see Figure 3 in section 5.3.1). The module is placed in the corner of host PCB above the keep-out
area. If the BT730-SA is not placed in corner but on edge of host PCB, the antenna keep-out area must
be modified (see Figure 4 in section 5.3.1).
3.
Ensure that there is no exposed copper under the module on the host PCB.
4.
The user may modify the PCB land pattern dimensions based on their experience and capability.
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7 APPLICATION NOTE FOR SURFACE MOUNT MODULES
7.1
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 will be updated as new information is presented.
The modules are designed to meet the needs of a number of commercial and industrial applications. The
modules are designed to be easily manufactured and conform to current automated manufacturing processes.
7.2
Shipping
Modules are shipped in ESD (Electrostatic Discharge) safe trays that can be loaded into most manufacturers pick
and place machines. Layouts of the trays are provided in Figure 11.
Figure 11: BT730 shipping tray details
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7.3
Reflow Parameters
Laird surface mount modules are designed to be easily manufactured including reflow soldering to a PCB. It is
ultimately 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 Technologies’ surface mount
modules conform to J-STD-020D1 standards for reflow temperatures.
Important: During reflow, modules should not be above 260° and not for more than 30 seconds.
Figure 12: Recommended reflow temperature
Temperatures should not exceed the minimums or maximums presented in Table 7-1.
Table 7-1: Recommended Maximum and minimum temperatures
Specification
Value
Unit
Temperature Inc./Dec. Rate (max)
Temperature Decrease rate (goal)
Soak Temp Increase rate (goal)
Flux Soak Period (Min)
Flux Soak Period (Max)
Flux Soak Temp (Min)
Flux Soak Temp (max)
Time Above Liquidous (max)
Time Above Liquidous (min)
Time In Target Reflow Range (goal)
Time At Absolute Peak (max)
Liquidous Temperature (SAC305)
Lower Target Reflow Temperature
1~3
2-4
.5 - 1
70
120
150
190
70
50
30
5
218
240
°C / Sec
°C / Sec
°C / Sec
Sec
Sec
°C
°C
Sec
Sec
Sec
Sec
°C
°C
Upper Target Reflow Temperature
Absolute Peak Temperature
250
260
°C
°C
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8
REGULATORY STATEMENTS
8.1
FCC
Family
BT7x0
US/FCC
SQGBT700
PART #
BT730-SA-XX
BT730-SC-XX
FORM FACTOR
Surface Mount
Surface Mount
CANADA/IC
3147A-BT700
TX OUTPUT
18 dBm
16 dBm
ANTENNA
Ceramic
U.FL
*Last two slots "XX" in Part # are used for production firmware release changes. Can be
values 01-99, aa-zz
The BT730 family has been designed to operate with the antennas listed below with a maximum gain of 2dBi.
The required antenna impedance is 50 ohms.
Item
1
2
3
4
5
Note:
8.2
Part Number
AT3216-B2R7HAAT
MAF94045
WRR2400- IP04-B(MAF94019)
WTC2450-IP04-K(MAF94006)
S181FL-L-RMM-2450S
Mfg.
ACX
Laird
Laird
Laird
Nearson (Laird)
Type
Chip
Internal
Dipole
Dipole
Dipole
Gain (dBi)
0.5
2
1.5
2
2
The OEM is free to choose another vendor’s antenna of like type and equal or lesser gain as an
antenna appearing in the table and still maintain compliance. Reference FCC Part 15.204(c)(4) for
further information on this topic. To reduce potential radio interference to other users, the antenna
type and gain should be chosen so that the equivalent isotropic radiated power (EIRP) is not more
than that permitted for successful communication.
Power Exposure Information
In general, there are two agency classifications for RF radiation exposure in wireless applications; portable and
mobile.
Mobile – A mobile device is defined as a transmitting device designed to be used in such a way that a separation
distance of at least 20 centimeters is normally maintained between the transmitter's radiating structures and
the body of the user or nearby persons. The BT730 is fully modular approved for mobile and fixed applications.
Reference FCC Part 2.1091 for further details on mobile devices.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Portable – Portable is a classification of equipment where the user, in general, will be within 20 cm of the
transmitting antenna. Portable equipment is further broken down into two classes; within 2.5 cm of human
contact and beyond 2.5 cm. The BT730 does not hold a portable approval classification due to its peak output
power and modular approval restrictions. Further RF evaluation is required by customers who want to use the
BT730 in portable applications. Contact a qualified test house or a Laird Technologies representative for further
information on this topic. Reference FCC Part 2.1093 for further details on portable devices.
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Maximum Permissible Exposure report has been created which shows the minimum distances for Public and
Occupational use of the BT730.
Note:
Occupational Limit Minimum Distance = 1.5 cm. Public Limit Minimum Distance = 3 cm
Note:
This equipment was tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference does
not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna
- Increase the separation between the equipment and the receiver
- Connect the equipment to an outlet on a circuit that is different from that to which the receiver
is connected.
- Consult the dealer or an experienced radio/TV technician for help
CAUTION: THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES AND INDUSTRY CANADA LICENSE-EXEMPT
RSS STANDARD(S). OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT
CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
CAUTION: The OEM should have the device incorporating with the BT740 tested by a qualified test house to
verify compliance with FCC Part 15 Subpart B limits for unintentional radiators.
CAUTION: Any changes or modifications not expressly approved by Laird could void the user’s authority to
operate the equipment.
8.3
OEM Responsibilities
This device is intended only for OEM integrators under the following conditions:
1)
The antenna must be installed such that 20 cm is maintained between the antenna and users.
2)
The transmitter module may not be co-located with any other transmitter or antenna
As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM
integrator is still responsible for testing their end-product for any additional compliance requirements required
with this module installed
IMPORTANT NOTE:
In the event that these conditions can not 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 can not 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.
End Product Labeling
This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm
may be maintained between the antenna and users. The final end product must be labeled in a visible area with
the following: “Contains FCC ID: SQGBT700”.
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Manual Information to the End User
The OEM integrator has to be aware not to provide information to the end user regarding how to install or
remove this RF module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning as show in this manual.
8.4
Industry Canada (IC) Warning:
Radiation Exposure Statement:
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
Déclaration d'exposition aux radiations:
Cet équipement est conforme aux limites d'exposition aux rayonnements IC établies pour un environnement
non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre la source
de rayonnement et votre corps.
This device is intended only for OEM integrators under the following conditions: (For module device use)
1) The antenna must be installed such that 20 cm is maintained between the antenna and users.
2) The transmitter module may not be co-located with any other transmitter or antenna.
As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM
integrator is still responsible for testing their end-product for any additional compliance requirements required
with this module installed.
Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes: (Pour utilisation
de dispositif module)
1)
L'antenne doit être installée de telle sorte qu'une distance de 20 cm est respectée entre l'antenne et les
utilisateurs.
2)
Le module émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne.
Tant que les 2 conditions ci-dessus sont remplies, des essais supplémentaires sur l'émetteur ne seront pas
nécessaires. Toutefois, l'intégrateur OEM est toujours responsable des essais sur son produit final pour toutes
exigences de conformité supplémentaires requis pour ce module installé.
IMPORTANT NOTE:
In the event that these conditions can not be met (for example certain laptop configurations or co-location with
another transmitter), then the Canada authorization is no longer considered valid and the IC ID can not 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 Canada authorization.
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.
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End Product Labeling
This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm
may be maintained between the antenna and users. The final end product must be labeled in a visible area with
the following: “Contains IC: ”.
Plaque signalétique du produit final
Ce module émetteur est autorisé uniquement pour une utilisation dans un dispositif où l'antenne peut être
installée de telle sorte qu'une distance de 20cm peut être maintenue entre l'antenne et les utilisateurs. Le
produit final doit être étiqueté dans un endroit visible avec l'inscription suivante: "Contient des IC: ".
Manual Information To the End User
The OEM integrator has to be aware not to provide information to the end user regarding how to install or
remove this RF module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning as show in this manual.
Manuel d'information à l'utilisateur final
L'intégrateur OEM doit être conscient de ne pas fournir des informations à l'utilisateur final quant à la façon
d'installer ou de supprimer ce module RF dans le manuel de l'utilisateur du produit final qui intègre ce module.
Le manuel de l'utilisateur final doit inclure toutes les informations réglementaires requises et avertissements
comme indiqué dans ce manuel.
8.5
CE Regulatory
The BT730 has been tested for compliance with relevant standards for the EU market. 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.
The BT730 was tested with a 2dBi dipole antenna. The OEM is free to use any manufacturer’s antenna and type
of antenna but it must be <2dBi to remain in compliance with the Laird reports.
Reference the Declaration of Conformities listed below for a full list of the standards that the modules were
tested to. Test reports are available upon request.
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9 EU DECLARATION OF CONFORMITY
Manufacturer:
Laird
Products:
BT730 / BT740
EU Directives:
Conformity Assessment:
1999/5/EC – R&TTE
2006/95/EC – Low Voltage directive (LVD)
2004/108/EC – Electromagnetic compatibility (EMC)
2014/30/EU – EMC
Annex IV
Reference standards used for presumption of conformity:
Article Number
3.1a
3.1b
3.2
Requirement
2006/95/EC
Low voltage equipment safety
Reference standard(s)
EN 609501:2006+A11:2009+A1:2010+A12:2011+A2:2013
2006/95/EC
RF Exposure
EN 62311:2008
2004/108/EC
Protection requirements with respect
to electromagnetic compatibility
1999/5/EC
Means of the efficient use of the radio
frequency spectrum
EN 301 489-1 v1.9.2 (2011-09)
EN 301 489-17 v2.2.1 (2012-09)
EN 300 328 v1.9.1 (2015-02)
EN 301 893 v1.8.1(2015-03)
Declaration:
We, Laird, declare under our sole responsibility that the essential radio test suites have been carried out and
that the above product to which this declaration relates is in conformity with all the applicable essential
requirements of Article 3 of the EU Directive 1999/5/EC, when used for its intended purpose.
Place of Issue:
Laird
W66N220 Commerce Court, Cedarburg, WI 53012 USA
tel: +1-262-375-4400 fax: +1-262-364-2649
Date of Issue:
August 2016
Name of Authorized Person:
Thomas T Smith, Director of EMC Compliance
Signature of Authorized Person:
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
29
© Copyright 2015 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT730
Datasheet
10 BLUETOOTH SIG QUALIFICATION
The BT730 module is listed on the Bluetooth SIG website as qualified End Products.
Design Name
Owner
BT730
Laird
Technologies
Declaration
ID
B020652
Link to listing on the SIG website
https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=20
652
It is a mandatory requirement of the Bluetooth Special Interest Group (SIG) that every product implementing
Bluetooth technology has a Declaration ID. Every Bluetooth design is required to go through the qualification
process, even when referencing a Bluetooth Design that already has its own Declaration ID. The Qualification
Process requires each company to registered as a member of the Bluetooth SIG – 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. The fees for the Declaration ID will depend on
your membership status, please refer to the following webpage:
https://www.bluetooth.org/en-us/test-qualification/qualification-overview/fees
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 Reference a Qualified Design and enter 20652 in the End Product table entry. You can then
select your pre-paid Declaration ID from the drop down menu or go to the Purchase Declaration ID page, (please
note that unless the Declaration ID is pre-paid or purchased with a credit card, it will not be possible to proceed
until the SIG invoice is paid.
Once all the relevant sections of step 1 are finished, complete steps 2, 3, and 4 as described in the help
document. Your new Design will be listed on the SIG website and you can print your Certificate and DoC.
For further information please refer to the following training material:
https://www.bluetooth.org/en-us/test-qualification/qualification-overview/listing-process-updates
10.1 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: [email protected]
Phone: Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
Web:
http://www.lairdtech.com/bluetooth
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
30
© Copyright 2015 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
BT730
Datasheet
11 ORDERING INFORMATION
Part Number
BT730-SA
Description
Class 1 Bluetooth V2.0 Module (internal antenna)
BT730-SC
DVK – BT730-SA
Class 1 Bluetooth v2.0 Module (uFL for external antenna)
Development board with BT730-SA module soldered in place
DVK – BT730-SC
Development board with BT730-SC module soldered in place
11.1 General Comments
This is a preliminary datasheet. Please check with Laird Technologies for the latest information before
commencing a design. If in doubt, ask.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
31
© Copyright 2015 Laird. All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
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