Users Manual
BT44-291S
Bluetooth Module
Hardware
Datasheet
Rev 1.0
2012-09-27
BT44-291S
Page 1 of 18
Contents
1. Features .....................................................................................................................................1
2. Product Description...................................................................................................................1
3. Applications ..............................................................................................................................1
4. Block Diagram ..........................................................................................................................2
5. Pin Descriptions ........................................................................................................................3
5.1 Device Terminal ............................................................................................................3
5.2 Device Terminal Functions ...........................................................................................3
6. Electrical Specifications............................................................................................................5
6.1 Input/Output Terminal Characteristics ..........................................................................5
6.2 Auxilliary ADC .............................................................................................................6
6.3 Absolute Maximum ratings...........................................................................................6
6.4 Power Consumption ......................................................................................................6
7. Radio Characteristics – Basic Data Rate...................................................................................7
7.1 This antenna Characteristics..........................................................................................7
7.2 Transmitter ....................................................................................................................7
7.3 Receiver ........................................................................................................................8
8. UART Interface.........................................................................................................................9
8.1 UART Bypass..............................................................................................................11
8.2 UART Configuration While RESET is Active ............................................................11
8.3 UART Bypass Mode ...................................................................................................11
8.4 Current Consumption in UART Bypass Mode............................................................11
9. I/O Parallel Ports..................................................................................................................... 11
10. IIC Interface ........................................................................................................................12
11. RESETB..............................................................................................................................13
11.1 Pin States on Reset......................................................................................................13
11.2 Status after Reset.........................................................................................................14
12. Solder Profiles.....................................................................................................................14
13. Physical Dimensions ...........................................................................................................15
14. Guide for Antenna Radiation ..............................................................................................16
15. Warning...............................................................................................................................18
BT44-291S
Page 1 of 18
BT44-291S
Bluetooth Module Class 2
1. Features
1.1 Operating Frequency Band 2.40 GHz~2.48GHz unlicensed ISM Band
1.2 Bluetooth Spec. V2.1+EDR
1.3 Class 2 type Output Power
1.4 UART Host Interface
1.5 Low Voltage Power Supply, 3.1V to 3.6V
1.6 Nominal Supply Voltage at 3.3±0.1V
1.7 Low Power Modes Available: Park, Sniff, Hold and Deep Sleep
1.8 Surface-mount, Size: 30.9×15.2 （unit：mm error = ±0.2mm）
2. Product Description
The BC04 Bluetooth Module BT44-291S is a Class 2 Bluetooth module using
BlueCore4-External chipset from leading Bluetooth chipset supplier, Cambridge Silicon Radio. It
provides a fully compliant Bluetooth system for data. The module and device firmware is fully
compliant with the Bluetooth specification v2.1+EDR.
3. Applications
3.1 PCs, PDAs
3.2 Computer Accessories (CF Cards, RS232 Adaptors, etc.)
BT44-291S
Page 2 of 18
3.3 Mice, Keyboard, Joysticks
3.4 FAX, Printer Adaptors
3.5 Digital Camera
3.6 Access Points to LAN and/or Dial-up network
4. Block Diagram
BT44-291S
Page 3 of 18
5. Pin Descriptions
5.1 Device Terminal
No. Des Des No.
GND 47
1 GND Pio10 46
2 Pio11 Pio9 45
3 Aio1 Pio8 44
4 Aio0 Pio0 43
5 Aio2 Pio1 42
6 RST Pio2 41
7 MISO Pio3 40
8 CSB Pio4 39
9 SCLK Pio5 38
10 MOSI Pio6 37
11 CTS Pio7 36
12 TX UD+ 35
13 RTS UD- 34
14 RX D0 33
15 Vref D1 32
16 VCC D2 31
17 GND
D3 30
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4
18 19 20 21 22 23 24 25 26 27 28 29
5.2 Device Terminal Functions
USB and UART PIN TYPE DESCRIPTION
UD+ 35 Bi-directional USB data plus with selectable internal
1.5kΩ pull-up resistor
UD- 34 Bi-directional USB data minus
CTS 11 CMOS input with weak
internal pull-down
UART clear to send active low
TX 12 CMOS output, tri-state, with weak
internal pull-up
UART data output
RTS 13 CMOS output, tri-state, with weak
internal pull-up
UART request to send active low
RX 14 CMOS input with weak internal
pull-down
UART data input
BT44-291S
Page 4 of 18
PIO Port PIN TYPE DESCRIPTION
Pio0 43
Pio1 42
Pio2 41
Pio3 40
Programmable input/output line
Pio4 39
Programmable input/output line or
Optionally BT_Priority/Ch_Clk
output for co-existence signalling
Pio5 38
Programmable input/output line or
Optionally BT_Active output for
co-existence signalling
Pio6 37
Programmable input/output line or
Optionally WLAN_Active/Ch_Data
input for co-existence signalling
Pio7 36
Pio8 44
Pio9 45
Pio10 46
Pio11 2
Bi-directional with programmable
strength internal pull-up/down
Programmable input/output line
Aio0 4
Aio1 3
Aio2 5
Bi-directional Programmable input/output line
External Memory
Data Interface PIN TYPE DESCRIPTION
D15
～
D0
18
～
33
Bi-directional with weak internal
pull-down
Data line
D15 to 18.
Test and Debug PIN TYPE DESCRIPTION
RST 6
CMOS input with weak internal
pull-up
internal pull-up Reset if low. Input
debounced so must be low for >5ms to
cause a reset
MISO 7 CMOS output, tri-state, with weak
internal pull-down
Serial Peripheral Interface data output
CSB 8 CMOS input with weak internal
pull-up
Chip select for Synchronous Serial
Interface active low
SCLK 9 CMOS input with weak internal
pull-down
Serial Peripheral Interface clock
MOSI 10 CMOS input with weak internal
pull-down
Serial Peripheral Interface data input
Power Supplies and PIN TYPE DESCRIPTION
BT44-291S
Page 5 of 18
Control
Vref 15 Filter Capacitor for 1.8V
VCC 16 Power Supply +3.3V Power Supply。
GND
1
17
47
GND Ground
6. Electrical Specifications
Recommended Operating Conditions
Operating Condition MIN TYPE MAX
VCC(V) 3.1 3.3 3.6
6.1 Input/Output Terminal Characteristics
Digital Terminals Min Typ Max Unit
Input Voltage Levels
VIL input logic level low 2.7V ≤ Vcc ≤ 3.0V -0.4 - +0.8 V
VIH input logic level high 0.7Vcc - Vcc+0.4 V
Output Voltage Levels
VOL output logic level low
(lo = 4.0mA), 2.7V ≤ Vcc ≤ 3.0V - - 0.2 V
VOH output logic level high
(lo = -4.0mA), 2.7V ≤ Vcc ≤ 3.0V Vcc-0.2 - - V
Input and Tri-state Current with
Strong pull-up -100 -40 -10 μA
Strong pull-down +10 +40 +100 μA
Weak pull-up -5.0 -1.0 -0.2 μA
Weak pull-down +0.2 +1.0 +5.0 μA
I/O pad leakage current -1 0 +1 μA
CI Input Capacitance 1.0 - 5.0 pF
Input threshold
VIL input logic level low - - 0.3Vcc V
VIH input logic level high 0.7Vcc - - V
Input leakage current
0V < VIN < Vcc(1) -1 1 5 μA
CI Input capacitance 2. 5 - 10.0 pF
Output Voltage levels To correctly terminated USB Cable
VOL output logic level low 0.0 - 0.2 V
VOH output logic level high 2.8 - Vcc V
USB Terminals
VIL input logic level low - - 0.3Vcc V
VIH input logic level high 0.7Vcc - - V
VOL output logic level low 0 - 0.2 V
BT44-291S
Page 6 of 18
VOH output logic level high 2.8 - Vcc V
6.2 Auxilliary ADC
Auxiliary ADC Min Typ Max Unit
Resolution - - 8 Bits
Input voltage range (LSB size = Vref/255) 0 - Vref V
Accuracy INL(Guaranteed monotonic) -1 - 1 LSB
Accuracy DNL (Guaranteed monotonic) 0 - 1 LSB
Offset -1 - 1 LSB
Gain Error -0.8 - 0.8 %
Input Bandwidth - 100 - kHz
Conversion time - 2.5 - μs
Sample rate(a) - - 700 Samples/s
6.3 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.
Parameter Min Max Unit
Peak current of power supply 0 75 mA
Voltage at digital pins -0.3 3.6 V
Voltage at POWER pin 2.7 3.6 V
6.4 Power Consumption
Operation Mode Connection
Type
UART
Rate
(kbps)
Average Unit
Page scan - 115.2 0.42 mA
Inquiry and page scan - 115.2 0.76 mA
ACL No traffic Master 115.2 4.60 mA
ACL With file transfer Master 115.2 10.3 mA
ACL No traffic Slave 115.2 17.0 mA
ACL With file transfer Slave 115.2 24.7 mA
ACL 40ms sniff Master 38.4 2.40 mA
ACL 1.28s sniff Master 38.4 0.37 mA
SCO HV1 Master 38.4 39.2 mA
SCO HV3 Master 38.4 20.3 mA
SCO HV3 30ms sniff Master 38.4 19.8 mA
ACL 40ms sniff Slave 38.4 2.11 mA
ACL 1.28s sniff Slave 38.4 0.42 mA
Parked 1.28s beacon Slave 38.4 0.20 mA
SCO HV1 Slave 38.4 39.1 mA
SCO HV3 Slave 38.4 24.8 mA
SCO HV3 30ms sniff Slave 38.4 19.0 mA
BT44-291S
Page 7 of 18
Standby Host connection(a) - 38.4 40 uA
Reset (RESETB low)(a) - - 34 uA
(a) Low power mode on the linear regulator is entered and exited automatically when the chip
enters/leaves Deep Sleep mode .
7. Radio Characteristics – Basic Data Rate
Important Notes
BlueCore4 meets the Bluetooth v2.1 + EDR specification when used in a suitable application
circuit between -40°C and +105°C.
Tx output is guaranteed to be unconditionally stable over the guaranteed temperature range.
7.1 This antenna Characteristics
Band Width Peak Gain Impedance
2450MHz±50MHz -0.5dBi 50Ω
7.2 Transmitter
Radio Characteristics Vcc = 3.3V Temperature = +20°C
Min Typ Max Bluetooth
Specification Unit
Maximum RF transmit power(1)(2) - 2.5 - -6 to +4(3) dBm
Variation in RF power over temperature range with
compensation enabled (±)(4)
- 1.5 - - dB
Variation in RF power over temperature range with
compensation disabled (±)(4)
- 2 - - dB
RF power control range - 35 - ≥16 dB
RF power range control resolution (5) - 0.5 - - dB
20dB bandwidth for modulated carrier - 780 - ≤1000 kHz
Adjacent channel transmit power F=F0 ±2MHz(6)(7) - -40 - ≤-20 dBm
Adjacent channel transmit power F=F0 ±3MHz(6)(7) - -45 - ≤-40 dBm
Adjacent channel transmit power F=F0>±3MHz(6)(7) - -50 - ≤-40 dBm
Δf1avg .Maximum Modulation. - 165 - 140<
Δf1avg
<175
kHz
Δf2max .Minimum Modulation. - 150 - ≥115 kHz
Δf2avg / Δf1avg - 0.97 - ≥0.80 -
Initial carrier frequency tolerance - 6 - ±75 kHz
Drift Rate - 8 - ≤20 kHz
/50μS
Drift (single slot packet) - 7 - ≤25 kHz
Drift (five slot packet) - 9 - ≤40 kHz
2nd Harmonic content - -65 - ≤-30 dBm
3rd Harmonic content - -45 - ≤-30 dBm
Notes:
(1) BlueCore4 firmware maintains the transmit power to be within the Bluetooth v2.1 + EDR
BT44-291S
Page 8 of 18
specification limits.
(2) Measurement made using a PSKEY_LC_MAX_TX_POWER setting corresponds to a
PSKEY_LC_POWER_TABLE power table entry of 63.
(3) Class 2 RF transmit power range, Bluetooth v2.1 + EDR specification.
(4) To some extent these parameters are dependent on the matching circuit used, and its behaviour
over temperature. Therefore these parameters may be beyond CSR’s direct control.
(5) Resolution guaranteed over the range -5dB to -25dB relative to maximum power for Tx Level
>20.
(6) Measured at F0= 2441MHz.
(7) Up to three exceptions are allowed in the Bluetooth v2.1 + EDR specification. BlueCore4 is
guaranteed to meet the ACP performance as specified by the Bluetooth v2.1 + EDR specification.
7.3 Receiver
Radio Characteristics Vcc = 3.3V Temperature = +20°C
Frequency
(GHz) Min Typ Max Bluetooth
Specification Unit
2.402 - -84 -
2.441 - -84 -
Sensitivity at 0.1% BER
for all packet types 2.480 - -85 -
≤-70 dBm
Maximum received signal at 0.1% BER - 10 - ≤-20 dBm
Frequency
(GHz) Min Typ Max Bluetooth
Specification Unit
30 - 2000 - TBD - ≤-10
2000 - 2400 - TBD - ≤-27
2500 - 3000 - TBD - ≤-27
Continuous power required to block Bluetooth
reception (for sensitivity of -67dBm with 0.1%
BER) measured at the unbalanced port of the
balun. 3000 - 3300 - TBD - ≤-10
dBm
C/I co-channel - 6 - ≤11 dB
Adjacent channel selectivity C/I F=F0 +1MHz(1) (2) - -5 - ≤0 dB
Adjacent channel selectivity C/I F=F0 −1MHz(1) (2) - -4 - ≤0 dB
Adjacent channel selectivity C/I F=F0 +2MHz(1) (2) - -38 - ≤-30 dB
Adjacent channel selectivity C/I F=F0 −2MHz(1) (2) - -23 - ≤-20 dB
Adjacent channel selectivity C/I F≥F0 +3MHz(1) (2) - -45 - ≤-40 dB
Adjacent channel selectivity C/I F≤F0 −5MHz(1) (2) - -44 - ≤-40 dB
Adjacent channel selectivity C/I F=FImage(1) (2) - -22 - ≤-9 dB
Maximum level of intermodulation interferers (3) - -30 - ≥-39 dBm
Spurious output level (4) - TBD - - dBm/Hz
Notes:
(1) Up to five exceptions are allowed in the Bluetooth v2.1 + EDR specification. BlueCore4 is
guaranteed to meet the C/I performance as specified by the Bluetooth v2.1 + EDR specification.
(2) Measured at F0 = 2441MHz
(3) Measured at f1-f2 = 5MHz. Measurement is performed in accordance with Bluetooth RF test
RCV/CA/05/c. i.e. wanted signal at -64dBm
(4) Measured at the unbalanced port of the balun. Integrated in 100kHz bandwidth and then
normalized to 1Hz. Actual figure is typically below TBD dBm/Hz except for peaks of -52dBm
BT44-291S
Page 9 of 18
inband at 2.4GHz and ≤80dBm at 3.2GHz
8. UART Interface
BlueCore4-External Universal Asynchronous Receiver Transmitter (UART) interface
provides a simple mechanism for communicating with other serial devices using the RS232
standard(1).
BlueCore4-External
Figure 11.12: Universal Asynchronous Receiver
Four signals are used to implement the UART function, as shown in Figure 11.12. When
BlueCore4-External is connected to another digital device, UART_RX and UART_TX transfer
data between the two devices. The remaining two signals, UART_CTS and UART_RTS, can be
used to implement RS232 hardware flow control where both are active low indicators. All UART
connections are implemented using CMOS technology and have signalling levels of 0V and Vcc.
UART configuration parameters, such as Baud rate and packet format, are set using
BlueCore4-External software.
Notes:
In order to communicate with the UART at its maximum data rate using a standard PC, an
accelerated serial port adapter card is required for the PC.
(1) Uses RS232 protocol but voltage levels are 0V to VDD_USB, (requires external RS232
transceiver chip)
Parameter Possible Values
1200 Baud (≤2%Error)
Minimum 9600 Baud (≤1%Error)
Baud Rate
Maximum 3.0MBaud (≤1%Error)
Flow Control RTS/CTS or None
Parity None, Odd or Even
Number of Stop Bits 1 or 2
Bits per channel 8
Table 11.7: Possible UART Settings
The UART interface is capable of resetting BlueCore4-External upon reception of a break
signal. A Break is identified by a continuous logic low (0V) on the UART_RX terminal, as shown
BT44-291S
Page 10 of 18
in Figure 11.13. If tBRK is longer than the value, defined by the PS Key
PSKEY_HOST_IO_UART_RESET_TIMEOUT, (0x1a4), a reset will occur.
This feature allows a host to initialise the system to a known state. Also, BlueCore4-External
can emit a Break character that may be used to wake the Host.
Note:
The DFU boot loader must be loaded into the Flash device before the UART or USB
interfaces can be used.This initial flash programming can be done via the SPI.
Table 11.3 shows a list of commonly used Baud rates and their associated values for the
Persistent Store Key PSKEY_UART_BAUD_RATE (0x204). There is no requirement to use these
standard values. Any Baud rate within the supported range can be set in the Persistent Store Key
according to the formula in Equation 11.7.
Baud Rate = PSKEY_UART_BAUD_RATE / 0.004096
Equation 11.7: Baud Rate
Persistent Store Value
Baud Rate Hex Dec
Error
1200 0x0005 5 1.73%
2400 0x000a 10 1.73%
4800 0x0014 20 1.73%
9600 0x0027 39 -0.82%
19200 0x004f 79 0.45%
38400 0x009d 157 -0.18%
57600 0x00ec 236 0.03%
76800 0x013b 315 0.14%
115200 0x01d8 472 0.03%
230400 0x03b0 944 0.03%
460800 0x075f 1887 -0.02%
921600 0x0ebf 3775 0.00%
1382400 0x161e 5662 -0.01%
1843200 0x1d7e 7550 0.00%
2764800 0x2c3d 11325 0.00%
Table 11.8: Standard Baud Rates
BT44-291S
Page 11 of 18
8.1 UART Bypass
Figure 11.14: UART Bypass Architecture
8.2 UART Configuration While RESET is Active
The UART interface for BlueCore4-External while the chip is being held in reset is tri-state.
This will allow the user to daisy chain devices onto the physical UART bus. The constraint on this
method is that any devices connected to this bus must tri-state when BlueCore4-External reset is
de-asserted and the firmware begins to run.
8.3 UART Bypass Mode
Alternatively, for devices that do not tri-state the UART bus, the UART bypass mode on
BlueCore4-External can be used. The default state of BlueCore4-External after reset is de-asserted,
this is for the host UART bus to be connected to the BlueCore4-External UART, thereby allowing
communication to BlueCore4-External via the UART.
In order to apply the UART bypass mode, a BCCMD command will be issued to
BlueCore4-External upon this, it will switch the bypass to PIO[7:4] as shown in Figure 11.14.
Once the bypass mode has been invoked, BlueCore4-External will enter the deep sleep state
indefinitely.
In order to re-establish communication with BlueCore4-External, the chip must be reset so
that the default configuration takes affect.
It is important for the host to ensure a clean Bluetooth disconnection of any active links
before the bypass mode is invoked. Therefore it is not possible to have active Bluetooth links
while operating the bypass mode.
8.4 Current Consumption in UART Bypass Mode
The current consumption for a device in UART Bypass Mode is equal to the values quoted
for a device in standby mode.
9. I/O Parallel Ports
Fifteen lines of programmable bi-directional input/outputs (I/O) are provided. PIO[11:8] and
PIO[3:0] are powered from Vcc. PIO[7:4] are powered from Vcc. AIO [1:0] are powered from
Vref.
BT44-291S
Page 12 of 18
PIO lines can be configured through software to have either weak or strong pull-ups or
pull-downs. All PIO lines are configured as inputs with weak pull-downs at reset.
PIO[0] and PIO[1] are normally dedicated to RXEN and TXEN respectively, but they are
available for general use.
Any of the PIO lines can be configured as interrupt request lines or as wake-up lines from
sleep modes. PIO[6] or PIO [2] can be configured as a request line for an external clock source.
This is useful when the clock to BlueCore4-External is provided from a system application
specific integrated circuit (ASIC).
BlueCore4-External has three general purpose analogue interface pins, AIO[0], AIO[1].
These are used to access internal circuitry and control signals. One pin is allocated to decoupling
for the on-chip band gap reference voltage, the other three may be configured to provide
additional functionality.
Auxiliary functions available via these pins include an 8-bit ADC and an 8-bit DAC.
Typically the ADC is used for battery voltage measurement. Signals selectable at these pins
include the band gap reference voltage and a variety of clock signals; 48, 24, 16, 8MHz and the
XTAL clock frequency. When used with analogue signals the voltage range is constrained by the
analogue supply voltage (1.8V). When configured to drive out digital level signals (clocks)
generated from within the analogue part of the device, the output voltage level is determined by
Vref (1.8V).
Important Note:
CSR cannot guarantee that terminal functions PIOs remain the same. Please refer to the
software release note for the implementation of these PIO lines, as they are firmware build
specific.
10. IIC Interface
PIO[8:6] can be used to form a Master I2C interface. The interface is formed using software
to drive these lines.Therefore it is suited only to relatively slow functions such as driving a dot
matrix liquid crystal display (LCD),keyboard scanner or EEPROM.
Note:
PIO[7:6] dual functions, UART bypass and EEPROM support, therefore devices using an
EEPROM cannot support UART bypass mode PIO lines need to be pulled-up through 2.2kΩ
resistors.
For connection to EEPROMs, refer to CSR documentation on I2C EEPROMS for use with
BlueCore. This provides information on the type of devices which are currently supported.
BT44-291S
Page 13 of 18
Figure 11.31: Example EEPROM Connection
11. RESETB
BlueCore4-External may be reset from several sources: RESETB pin, power on reset, a
UART break character or via a software configured watchdog timer.
The RESETB pin is an active low reset and is internally filtered using the internal low
frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESETB
being active. It is recommended that RESETB be applied for a period greater than 5ms.
The power on reset occurs when the VDD_CORE supply falls below typically 1.5V and is
released when VDD_CORE rises above typically 1.6V.
At reset the digital I/O pins are set to inputs for bi-directional pins and outputs are tri-stated.
The PIOs have weak pull-downs.
Following a reset, BlueCore4-External assumes the maximum XTAL_IN frequency, which
ensures that the internal clocks run at a safe (low) frequency until BlueCore4-External is
configured for the actual XTAL_IN frequency. If no clock is present at XTAL_IN, the oscillator in
BlueCore4-External free runs, again at a safe frequency.
11.1 Pin States on Reset
Table 11.15 shows the pin states of BlueCore4-External on reset.
Pin Name State: BlueCore4-External
PIO[11:0] Input with weak pull-down
UART_TX Output tri-stated with weak pull-up
UART_RX Input with weak pull-down
UART_RTS Output tri-stated with weak pull-up
UART_CTS Input with weak pull-down
SPI_CSB Input with weak pull-up
SPI_CLK Input with weak pull-down
SPI_MOSI Input with weak pull-down
SPI_MISO Output tri-stated with weak pull-down
AIO[1:0] Output, driving low
RESETB Input with weak pull-up
Table 11.15: Pin States of BlueCore4-External on Reset
BT44-291S
Page 14 of 18
11.2 Status after Reset
The chip status after a reset is as follows:
z Warm Reset: Baud rate and RAM data remain available
z Cold Reset(1): Baud rate and RAM data not available
Note:
(1) Cold Reset constitutes one of the following:
z Power cycle
z System reset (firmware fault code)
z Reset signal, see Section “RESETB”
12. Solder Profiles
Composition of the solder ball: Sn 95.5%, Ag 4.0%, Cu 0.5%
Typical Lead-Free Re-flow Solder Profile
Key features of the profile:
z Initial Ramp = 1-2.5°C/sec to 175°C±25°C equilibrium
z Equilibrium time = 60 to 180 seconds
z Ramp to Maximum temperature (250°C) = 3°C/sec max.
z Time above liquidus temperature (217°C): 45-90 seconds
z Device absolute maximum reflow temperature: 260°C
Devices will withstand the specified profile. Lead-free devices will withstand up to three reflows
to a maximum temperature of 260°C.
Notes：They need to be baked prior to mounting。
BT44-291S
Page 15 of 18
13. Physical Dimensions
A B C D E F G H J K L
600 1186 220 70 50 96 80 90 32 28 40 mil
15.24 30.12 5.59 1.78 1.27 2.44 2.03 2.29 0.81 0.71 1.02 mm
BT44-291S
Page 16 of 18
14. Guide for Antenna Radiation
In order to achieve longest communication range, please keep the area surrounding antenna
free of grounding or metal housing.
BT44-291S
Page 17 of 18
BT44-291S
Page 18 of 18
15. Warning
FCC ID statement
This equipment complies with Part 15 of the FCC Rules.
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.
Any changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
IC statement
Disclaimer:
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.
RF exposure warning
This equipment must be installed and operated in accordance with provide instructions and the
antenna used for this transmitter must be installed to provide a separation distance of at least 20
cm from all persons and must not be co-located or operation in conjunction with any other antenna
or transmitter. End-users and installers must be provide with antenna installation instructions and
transmitter operating conditions for satisfying RF exposure compliance.
Information to be supplied to the end user by the OEM or Integrator
The following regulator and safety notices must be published in documentation supplied to the end
user of the product or system incorporating an adapter in compliance with local regulation. Host
system must be labeled as following:
“Contains transmitter module FCC ID: VMTBT44-291S, IC: 8941A- BT44291S”