RN52 Bluetooth Audio Module RN52-DS Features:

RN52 Bluetooth Audio Module RN52-DS Features:
RN52-DS
RN52 Bluetooth Audio Module
Features:
• Fully qualified Bluetooth® version 3.0 module,
fully compatible with Bluetooth version 2.1+EDR,
1.2, and 1.1
• Software configurable through commands over
UART console interface
• Dedicated GPIO pins enable MCUs to access
control and status functions efficiently
• Postage-stamp-sized form factor, 13.5 x 26.0 x
2.7 mm
• Embedded Bluetooth stack profiles: A2DP,
AVRCP, HFP/HSP, and SPP
• Dual-channel, differential audio input and output
for highest quality audio
• Supports iAP profile to discover iOS devices and
apps (requires a special firmware build)
• Integrated amplifier for driving 16 Ω speakers
• UART (SPP) data connection interfaces
• External audio CODECs supported via S/PDIF
and I2S interface
• Castellated SMT pads for easy and reliable PCB
mounting
• Environmentally friendly, RoHS compliant
• Certifications: FCC, ICS, CE
• Bluetooth SIG certified
Applications:
•
•
•
•
•
•
•
•
•
High-quality, 2-channel audio streaming
Wireless stereo headsets
Automotive hands free audio
Wireless audio docking station for smartphones
Wireless speakers
Intercom push-to-talk audio connection
Remote control for media player
Medical devices
Computer accessories
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RN52 Block Diagram:
RN52
2 LEDs
PCB Antenna
Speaker
MIC
Bluetooth 3.0
RF Baseband
Speaker
MIC
Audio DSP
16-Bit Stereo
CODEC
UART
USB
I2S
16-Bit RISC MCU
11 GPIO
Pins
S/PDIF
16-MBit Flash
1 AIO
Version 1.1r 3/20/13
Advanced Information
page 1
RN52-DS
1.0
DEVICE OVERVIEW
Roving Network’s RN52 Bluetooth audio module provides a highly integrated solution for delivering highquality stereo audio in a small form factor. It combines
a class 2 Bluetooth radio with an embedded DSP processor. The module is programmed and controlled with
a simple ASCII command language.
TABLE 1-1:
The RN52 module complies with Bluetooth specification version 3.0. It integrates RF, a baseband controller,
etc., making it a complete Bluetooth subsystem. The
RN52 supports a variety of profiles including HSP/HFP,
A2DP, AVRCP, SPP, and iAP. It provides a UART interface, several user programmable I/O pins, stereo
speaker outputs, microphone inputs, and a USB port.
Table 1-1 provides the general specifications for the
module. Table 1-2 and Table 1-3 provide the module’s
weight, dimensions, and electrical characteristics.
GENERAL SPECIFICATIONS
Specification
Standard
Description
Bluetooth 3.0, class 2
Frequency Band
2.4 ~ 2.48 GHz
Modulation Method
GFSK, PI/4-DQPSK, 8 DPSK
Maximum Data Rate
3 Mbps
RF Input Impedance
50 ohms
Interface
UART, GPIO, AIO, USB, SPI, speaker, microphone
Operation Range
10 meters (33 feet)
Sensitivity
-85 dBm at 0.1 % BER
RF TX Power
4 dBm
TABLE 1-2:
WEIGHT & DIMENSIONS
Specification
Description
Dimensions
26.0 mm x 13.5 mm x 2.7 mm
Weight
1.2 g
TABLE 1-3:
ELECTRICAL CHARACTERISTICS
Specification
Description
Supply Voltage
3.0 ~ 3.6 V DC
Working current
Depends on profiles, 30 mA typical
Standby current (disconnected)
< 0.5 mA
Temperature
-40ºC to +85ºC
ESD
JESD22-A224 class 0 product
Humidity
10% ~ 90% non-condensing
Figure 1-1 shows the module’s dimensions and
Figure 1-2 shows recommended landing pattern and
layout.
www.rovingnetworks.com
Version 1.1r 3/20/13
Advanced Information
page 2
RN52-DS
FIGURE 1-1:
MODULE DIMENSIONS
(Side View)
0.75
12.75
(Top View)
26.00
26.00
21.40
21.20
20.00
18.80
17.60
16.40
15.20
14.00
12.80
11.60
10.40
9.20
8.00
6.80
5.60
4.40
3.20
2.00
Tolerances:
PCB Outline: +/- 0.13 mm
PCB Thickness: +/- 0.100 mm
21.40
0.70
0.00
2.70
0.80
0.00
0.00
0.85
2.55
3.75
4.95
6.15
7.35
8.55
9.75
10.95
12.65
13.50
0.0
FIGURE 1-2:
Dimensions are in millimeters
RECOMMENDED PCB FOOTPRINT
3.25
4.65
6.05
7.45
8.85
10.25
(Top View)
0.8mm
1.6mm
26.00
21.40
20.70
21.20
20.00
18.80
17.60
16.40
15.20
14.00
12.80
11.60
10.40
9.20
8.00
6.80
5.60
4.40
3.20
2.00
Host Ground Plane Edge
(See Mounting Details)
Ground Pads
0.8 x 1.0 mm
0.80mm
0.00
0.85
2.55
3.75
4.95
6.15
7.35
8.55
9.75
10.95
12.65
13.50
0.0
Dimensions are in millimeters
www.rovingnetworks.com
Version 1.1r 3/20/13
Advanced Information
page 3
RN52-DS
Figure 1-3 shows the pinout and Table 1-4 describes
the module’s pins.
PIN DIAGRAM
GND
GND
GND
GND
GND
GND
50
49
48
47
46
45
FIGURE 1-3:
TABLE 1-4:
Pin
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
GND
GND
SPKR_L+
SPKR_R+
SPKR_LSPKR_RAGND
MIC_RMIC_LMIC_R+
MIC_L+
MIC_BIAS
LED0
LED1
SPI_MOSI
SPI_SCK
SPI_MISO
SPI_SS
27
GPIO7
GPIO6
PWREN
VDD
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
19
20
21
22
23
24
25
26
RN52
Top View
GND
GND
GPIO3
GPIO2
AICO0
GPIO4
GPIO5
GPIO12
GPIO13
GPIO11
GPIO10
GPIO9
USBDUSBD+
UART_RTS
UART_CTS
UART_TX
UART_RX
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
PIN DESCRIPTION (PART 1 OF 3) Note 1
Symbol
I/O Type
Description
Direction Default
1
GND
Ground.
Ground.
2
GPIO3
Bidirectional with programmable strength internal
pull-up/down.
This pin enters device firmware update (DFU)
mode at bootup if a USB device powers VBUS.
GPIO3 requires 47 kΩ to ground and 22 kΩ to
the USB VBUS signal if the USB VBUS is supplying power to the main board.
Input
Low
3
GPIO2
Bidirectional with programmable strength internal
pull-up/down.
Reserved, event register. Toggles from high to
low for 100 ms to indicate that the module’s state
has changed. A microcontroller can enter command mode and poll the state register using the
Q action command.
Output
High
4
AIO0
Bidirectional.
Analog programmable input/output line.
5
GPIO4
Bidirectional with programmable strength internal
pull-up/down.
Factory reset mode. To reset the module to the
factory defaults, GPIO4 should be high on
power-up and then toggle low, high, low, high
with a 1 second wait between the transitions.
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Version 1.1r 3/20/13
Advanced Information
I/O
Input
Low
page 4
RN52-DS
TABLE 1-4:
Pin
PIN DESCRIPTION (PART 2 OF 3) Note 1
Symbol
I/O Type
Description
Direction Default
6
GPIO5
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
7
GPIO12
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
8
GPIO13
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
9
GPIO11
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
10
GPIO10
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
11
GPIO9
Bidirectional with programmable strength internal
pull-up/down.
When you drive this signal low, the module’s
UART goes into command mode. If this signal
floats high, the UART is in data mode. Reserved.
Not available for use at runtime.
Input
High
12
USBD-
Bidirectional.
USB data minus.
I/O
13
USBD+
Bidirectional.
USB data plus with selectable internal 1.5-Kohm
pull-up resistor.
I/O
14
UART_RTS CMOS output, tri-state, with UART request to send active low.
weak internal pull-up.
15
UART_CTS CMOS input with weak
internal pull-down.
16
UART_TX
CMOS output, tri-state, with UART data output.
weak internal pull-up.
17
UART_RX
CMOS input with weak
internal pull-down.
18
GND
Ground.
Ground.
19
GPIO7
Bidirectional with programmable strength internal
pull-up/down.
Driving this pin low sets the UART baud rate to
9,600. By default the pin is high with a baud rate
of 115,200.
I/O
High
20
GPIO6
Bidirectional with programmable strength internal
pull-up/down.
Programmable I/O.
I/O
High
21
PWREN
Analog.
Pull high to power up RN52.
22
VDD
3.3-V power input.
3.3v power input.
23
PCM_IN
CMOS input, with weak
internal pull down.
Synchronous data input, configurable for
SPDIF_IN or SD_IN (I2S).
Input
24
PCM_OUT
CMOS input, with weak
internal pull down.
Synchronous data input, configurable for
SPDIF_OUT or SD_OUT (I2S).
Input
25
PCM_SYNC Bidirectional with weak
internal pull down.
26
PCM_CLK
CMOS input, with weak
internal pull down.
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UART clear to send active low.
UART data input.
Synchronous data sync; WS (I2S).
Synchronous data clock; SCK (I2S).
Version 1.1r 3/20/13
Advanced Information
Output
Input
Output
Input
I/O
Input
page 5
RN52-DS
TABLE 1-4:
Pin
PIN DESCRIPTION (PART 3 OF 3) Note 1
Symbol
I/O Type
Description
Direction Default
27
GND
Ground.
Ground.
28
SPI_SS
CMOS input with weak
internal pull-up.
Chip select for Synchronous Serial Interface
active low.
29
SPI_MISO CMOS output, tri-state, with Serial Peripheral Interface (SPI) output.
weak internal pull-down.
30
SPI_CLK
Input with weak internal
pull-down.
SPI clock.
Input
31
SPI_MOSI CMOS input, with weak
internal pull-down.
SPI input.
Input
32
LED1
Open drain output.
Drives an LED. For the RN-52-EK board, this
signal drives the red LED.
Output
33
LED0
Open drain output.
Drives an LED. For the RN-52-EK board, this
signal drives the blue LED.
Output
34
MIC_BIAS Analog.
Microphone bias.
Output
35
MIC_L+
Analog.
Microphone input positive, left.
Output
36
MIC_R+
Analog.
Microphone input positive, right.
Output
37
MIC_L-
Analog.
Microphone input negative, left.
Output
38
MIC_R-
Analog.
Microphone input negative, right.
Output
39
AGND
Analog.
Ground connection for audio.
40
SPK_R-
Analog.
Speaker output negative (right side).
41
SPK_L-
Analog.
Speaker output negative (left side).
Output
42
SPK_R+
Analog.
Speaker output positive (right side).
Output
43
SPK_L+
Analog.
Speaker output positive (left side).
Output
44
GND
Ground.
Ground.
45
GND
Ground.
RF ground.
46
GND
Ground.
RF ground.
47
GND
Ground.
RF ground.
48
GND
Ground.
RF ground.
49
GND
Ground.
RF ground.
50
GND
Ground.
RF ground.
Input
Output
Output
Note 1: All GPIO pins default to input with weak pull-down.
1.1
1.1.1
Audio Interface Circuit
Description
The stereo audio CODEC interface has stereo and
mono analog input/output for voice and audio bands. It
supports the IEC-60958 stereo digital audio bus standards, e.g., S/PDIF and AES3/EBU.
The RN52 audio interface circuit consists of:
• Stereo audio CODEC
• Dual audio inputs and dual outputs
• Configurable S/PDIF and I2S interface
The audio input circuitry has a dual audio input that can
be configured as single-ended or fully differential and
programmed for microphone or line input. It has an
analog and digital programmable gain stage so that it
can be optimized for different microphones. See
Figure 1-4.
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STEREO AUDIO CODEC
INTERFACE
The built-in CODEC uses a fully differential architecture
in the analog signal path, which results in low noise
sensitivity and good power supply rejection while effectively doubling the signal amplitude. It operates from a
1.5 V single power supply and uses a minimum of
external components. See Figure 1-5.
Version 1.1r 3/20/13
Advanced Information
page 6
RN52-DS
FIGURE 1-4:
RN52 AUDIO INTERFACE BLOCK DIAGRAM
System
Mainboard
RN52
SPK_L+
SPK_L-
Audio
PA
SPK_R+
SPK_RS/PDIF & I2S
MIC_L+
MIC_L-
MIC &
Bias
MIC_R+
MIC_RMIC_BIAS
FIGURE 1-5:
STEREO CODEC AUDIO INPUT/OUTPUT STAGES
Input
Amplifier
RN52
MIC_L+
ΣΔ-ADC
MIC_LOutput
Amplifier
LP Filter
SPK_L+
DAC
SPK_LDigital
Circuitry
Input
Amplifier
MIC_R+
ΣΔ-ADC
MIC_ROutput
Amplifier
SPK_R+
LP Filter
DAC
SPK_R-
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Version 1.1r 3/20/13
Advanced Information
page 7
RN52-DS
1.1.2
ANALOG-TO-DIGITAL CONVERTER
(ADC)
The ADC consists of two second-order sigma delta
(SD) converters, resulting in two separate channels
with identical functionality. Each ADC supports the following sample rates:
• 8 kHz
• 11.025 kHz
• 16 kHz
FIGURE 1-6:
•
•
•
•
22.05 kHz
24 kHz
32 kHz
44.1 kHz
The ADC analog amplifier is a two-stage amplifier. The
first stage selects the correct gain for either microphone or line input. See Figure 1-6.
ADC ANALOG AMPLIFIER BLOCK DIAGRAM
Bypass or 24-dB Gain
-3 to 18 dB Gain
P
–
–
P
N
+
+
N
Line Mode/Microphone Mode
Gain 0:7
Microphone Mode Input Impedance = 6 kΩ
Line Mode Input Impedance = 6 kΩ to 30 kΩ
1.1.3
DIGITAL-TO-ANALOG CONVERTER
(DAC)
The DAC consists of two third-order SD converters,
resulting in two separate channels with identical functionality. Each DAC supports the following sample
rates:
•
•
•
•
•
•
•
8 kHz
11.025 kHz
16 kHz
22.05 kHz
24 kHz
32 kHz
44.1 kHz
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1.1.4
MICROPHONE INPUT
The RN52 audio input is intended for use from 1 μA at
94 dB SPL to about 10 μA at 94 dB SPL, which requires
microphones with sensitivity between –40 and –60
dBV. MIC_BIAS requires a minimum load to maintain
regulation. MIC_BIAS maintains regulation within
0.199 and 1.229 mA. Therefore, if you use a microphone with specifications below these limits, the microphone output must be pre-loaded with a large value
resistor to ground.
Version 1.1r 3/20/13
Advanced Information
page 8
RN52-DS
2.0
APPLICATIONS
2.1
The following sections provide information on designing with the RN52 module, including restoring factory
defaults, using the LED interface, minimizing radio
interference, solder reflow profile, typical application,
etc.
FIGURE 2-1:
Minimizing Radio Interference
When laying out the host PCB for the RN52 module,
the areas under the antenna and shielding connections
should not have surface traces, ground planes, or
exposed via (see Figure 2-1). For optimal radio performance, the RN52 module’s antenna end should protrude at least 31 mm beyond any metal enclosure.
Figure 2-2 shows examples of good, bad, and acceptable positioning of the RN52 on the host PCB.
MINIMIZING RADIO INTERFERENCE
(Top View)
31 mm
Keep area around antenna
(approximately 31 mm) clear
of metallic structures for
best performance
31 mm
Edge of Ground Plain
4.6 mm
21.4 mm
Dimensions are in millimeters
FIGURE 2-2:
PCB EXAMPLE LAYOUT
RN52
Good
RN52
Bad
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RN52
RN52
Acceptable
Acceptable
Version 1.1r 3/20/13
Advanced Information
page 9
RN52-DS
2.2
LED Interface
2.3
The RN52 includes two pads dedicated to driving the
LED indicators. The firmware can control both terminals, and the battery charger can set LED0. The terminals are open-drain outputs; therefore, the LED must
be connected from a positive supply rail to the pad in
series with a current limiting resistor. You should operate the LED pad (LED0 or LED1 pins) with a pad voltage below 0.5 V. In this case, the pad can be thought of
as a resistor, RON. The resistance—together with the
external series resistor—sets the current, ILED, in the
LED. The current is also dependent on the external
voltage, VDD, as shown in Figure 2-3.
Device Firmware Updates
The module has a device firmware update (DFU) mode
in which you use the USB interface to update the firmware. ImplementingImplementing the DFU feature is
recommended highly because firmware updates offer
new features and enhance the module’s functionality.
Follow the reference design shown in Figure 2-7 to
support this mode.
Note:
A 47 KΩ pull-down resistor (R2 in
Figure 2-4) is required on GPIO3 even if
you do not use the USB for DFU.
FIGURE 2-4:
FIGURE 2-3:
VDD
C4
LED Forward
Voltage, VF
GPIO3
RLED
LED0 or
LED1
Resistor Voltage
Drop, VR
2.4
The LEDs can be used to indicate the module’s connection status. Table 2-1 describes the LED functions.
STATUS LED FUNCTIONS
Blue LED Red LED
Off
Flashing
Description
Flashing The RN52 module is discoverable.
Flashing The module is connected.
Off
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MBR120
J2
1
VBUS
2
D3
D+
5
R2
47k
VBUS
(3.3V)
D1
10nF
USBDUSBD+
Pad Voltage, VPAD
RON = 20 Ω
Flashing
R1
22k
|LED
TABLE 2-1:
USB DFU PORT & GPIO3
SCHEMATIC
LED INTERFACE
6
MTAB
GND
USB Mini B Connector
(JAE DX2R005HN2E700)
Restore Factory Defaults with
GPIO4
You should connect the GPIO4 pin to a switch, jumper,
or resistor so it can be accessed. You can use this pin
to reset the module to its factory default settings, which
is critical in situations where the module has been misconfigured. To reset the module to the factory defaults,
GPIO4 should be high on power-up and then toggle
low, high, low, high with a 1 second wait between the
transitions.
The module is connectable.
Version 1.1r 3/20/13
Advanced Information
page 10
RN52-DS
2.5
Solder Reflow Profile
The lead-free solder reflow temperature and times are:
• Temperature—230° C, 60 seconds maximum,
peak 245° C maximum
• Preheat temperature—165° ± 15° C, 90 to 120
seconds
• Time—Single pass, one time
TABLE 2-2:
To reflow solder the module onto a PCB, use an RoHScompliant solder paste equivalent to NIHON ALMIT
paste or OMNIX OM-310 solder paste from Alpha metals. See Table 2-2.
Note:
Use no-clean flux and DO NOT water
wash
PASTE SOLDER RECOMMENDATIONS
Manufacturer
Alpha Metals
http://www.alphametals.com
NIHON ALMIT Co. LTD
http://almit.co.jp
Part Number
OMNIX OM-310
LFM-70W INP
Metal Composition
SAC305 (96.5% Sn, 3% Ag, 0.5% Cu)
88% Sn, 3.5% Ag, 0.5% Bi, 8% In
Liquidus Temperature
~220°C
~215°C
Figure 2-5 and Figure 2-6 show the solder reflow temperature profiles.
FIGURE 2-5:
SOLDER REFLOW TEMPERATURE PROFILE
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Version 1.1r 3/20/13
Advanced Information
page 11
RN52-DS
FIGURE 2-6:
SOLDER REFLOW CURVE
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Version 1.1r 3/20/13
Advanced Information
page 12
29
30
31
32
33
34
35
36
37
38
SPI _MI SO
SPI _SCK
SPI _MOSI
L ED1
L ED0
MI C_BI AS
MI C_L +
MI C_R+
MI C_L -
MI C_R-
41
42
43
SPKR_L -
SPKR_R+
SPKR_L +
44
40
SPKR_R-
39
28
SPI _SS
PCM_CL K
PCM_SYNC
PCM_OUT
PCM_IN
27
GND
SPKR_L +
SPKR_R+
SPKR_L-
SPKR_R-
AGND
MIC_R-
MIC_L-
MIC_R+
MIC_L+
MIC_BIAS
L ED0
L ED1
SPI_MOSI
SPI_SCK
SPI_MISO
SPI _SS
GND
26
PCM_CL K
25
45
L ED1
L ED0
24
3.3V
D3
GND
GPIO3
GPIO2
AIO0
GPIO4
GPIO5
GPIO12
GPIO13
GPIO11
GPIO10
GPIO9
USBD-
USBD+
UART_RTS
UART_CTS
UART_TX
PI O3
UART_TX
UART_CTS
UART_RTS
USBD+
USBDPI O9
BTN_VOL DOWN
BTN_PREVI OUS
BTN_PLAY
BTN_NEXT
BTN_VOL UP
PI O4
AI O0
PI O2
PI O3
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
UART_RX
UART_TX
UART_RX
PI O9
S5
Wake
Device
Firmware
Update
USBDUSBD+
22k
10nF
C4
Vol Up
MI C_R-
MI C_L -
S1
Prev
S3
Play / Pause
S4
2
4
6
8
10
12
14
16
6
AI O0
47nF
C10
C8
47nF
C9
47nF
C12
1uF
S6
Next
S2
Vol Down
47nF
C11
MI C_BI AS
3.3V
PCM_I N
PCM_OUT
PCM_SYNC
PCM_CL K
VBUS
J3
EXT Connector
1
3
5
7
9
11
13
15
MI C_L +
MI C_R+
3.3V
GND
MTAB
VBUS
USB Mini B / RSVD USB
5
J2
1
VBUS
2
D3
D+
MBR120
D1
MI C_R
MI C_L
R7
2k2
BTN_PREVI OUS
BTN_NEXT
BTN_PL AY
BTN_VOL DOWN
BTN_VOL UP
R6
2k2
MI C_R
MI C_L
SPKR_RSPKR_L SPKR_R+
SPKR_L +
VBUS
J6
1
2
J8
MI CR
1
2
MI CL
J7
1
3
5
7
9
Battery
1
2
J11
VBUS
2
4
6
8
10
C6
1uF
Mic
1
Vin
TC1262- 3.3V
4J5
3
5
2
1
3.3V
PI O2
PI O4
BTN_VOLUP
BTN_NEXT
BTN_PLAY
BTN_PREVI OUS
BTN_VOLDOWN
PI O7
PI O6
PWREN
MI C_L +
MI C_R+
MI C_L MI C_RMI C_BI AS
Vout
3
U2
3.3V
UART_RX
UART_TX
J10
1
2
3
4
5
6
7
8
9
10
11
12
3.3V
1uF
C13
1uF
SPI _MI SO
SPI _MOSI
SPI _SCK
SPI _SS
C7
1uF
1uF
C21
C18
2k2
1uF
C14
1uF
C22
UART_CTS
UART_RTS
R70
SPKR_R-
SPKR_R+
SPKR_L +
SPKR_L -
22
CBUS0
21
CBUS1
10
CBUS2
11
CBUS3
9
CBUS4
30
TXD
2
RXD
32
RTS
8
CTS
31
DTR
6
DSR
7
DCD
3
RI
SPI MASTER
1
2
3
4
5
6
J4
VBUS
100nF
C2
22k
R12
22k
R13
47k
R11
47k
R16
22k
R17
22k
R15
8
7
4
3
IN2-
IN2+
BYPASS
IN1+
IN1-
C15
10uF
2
VBUS
47k
R14
10
Vo1
47k
R10
OSCO
OSCI
RESET
USBDP
USBDM
28
27
18
14
15
U1
FT232RQ
100nF
100nF
C1
C3
9
U4
TPA6112
Vo2
6
1
C16
100nF
SHUTDOWN
V DD
R1
17
PI O7
PI O6
R2
47k
M1
RN52 Module
Red LED
D2
PWREN
R9
470
UART_RX
Blue LED
R8
47R
PCM_OUT
46
PCM_SY NC
21
GND
23
GND
22
PCM_IN
47
GND
48
V DD
GND
18
GND
19
GPIO7
20
PWR E N
GND
49
GPIO6
GND
50
GND
2
T ab
4
19
V CC
1
V CCIO
20
GND
17
GND
4
GND
24
A GND
33
T HPA D
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26
GND
5
PA D
11
www.rovingnetworks.com
16
VBUS
GND
MTAB
6
Headphones
1J9
2
5
3
4
USB Mini B / CSR UART
5
J1
1
VBUS
2
D3
D+
100uF
100uF
C19
C17
100uF
100uF
C23
C20
FIGURE 2-7:
3V 3OUT
2.6
T E ST
3.3V
RN52-DS
Typical Application Schematic
Figure 2-7 shows a typical application circuit with LDO,
stereo audio/microphone PA, USB/UART, AVRCP
switches, and LED0/LED1.
TYPICAL APPLICATION CIRCUIT FOR A2DP AUDIO STREAMING & AVRCP
REMOTE CONTROL
page 13
RN52-DS
3.0
REGULATORY APPROVAL
This section outlines the regulatory information for the
RN52 module for the following countries:
•
•
•
•
•
United States
Canada
Europe
Australia
New Zealand
3.1
Contains Transmitter Module FCC ID: T9J-RN52
or
Contains FCC ID: T9J-RN52
United States
The RN52 module has received Federal Communications Commission (FCC) CFR47 Telecommunications,
Part 15 Subpart C “Intentional Radiators” modular
approval in accordance with Part 15.212 Modular
Transmitter approval. Modular approval allows the end
user to integrate the RN52 module into a finished product without obtaining subsequent and separate FCC
approvals for intentional radiation, provided no
changes or modifications are made to the module circuitry. Changes or modifications could void the user’s
authority to operate the equipment. The end user must
comply with all of the instructions provided by the
Grantee, which indicate installation and/or operating
conditions necessary for compliance.
The finished product is required to comply with all applicable FCC equipment authorizations regulations,
requirements and equipment functions not associated
with the transmitter module portion. For example, compliance must be demonstrated to regulations for other
transmitter components within the host product; to
requirements for unintentional radiators (Part 15 Subpart B “Unintentional Radiators”), such as digital
devices, computer peripherals, radio receivers, etc.;
and to additional authorization requirements for the
non-transmitter functions on the transmitter module
(i.e., Verification, or Declaration of Conformity) (e.g.,
transmitter modules may also contain digital logic functions) as appropriate.
3.1.1
installed must also display a label referring to the
enclosed module. This exterior label can use wording
as follows:
LABELING AND USER
INFORMATION REQUIREMENTS
The RN52 module has been labeled with its own FCC
ID number, and if the FCC ID is not visible when the
module is installed inside another device, then the outside of the finished product into which the module is
This device 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
A user’s manual for the product should include the following statement:
This equipment has been 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 will 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 try 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 receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV
technician for help.
Additional information on labeling and user information
requirements for Part 15 devices can be found in KDB
Publication 784748 available at the FCC Office of Engineering and Technology (OET) Laboratory Division
Knowledge Database (KDB) http://apps.fcc.gov/oetcf/
kdb/index.cfm.
3.1.2
RF EXPOSURE
All transmitters regulated by FCC must comply with RF
exposure requirements. OET Bulletin 65, Evaluating
Compliance with FCC Guidelines for Human Exposure
www.rovingnetworks.com
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page 14
RN52-DS
to Radio Frequency Electromagnetic Fields, provides
assistance in determining whether proposed or existing
transmitting facilities, operations or devices comply
with limits for human exposure to Radio Frequency
(RF) fields adopted by the Federal Communications
Commission (FCC). The bulletin offers guidelines and
suggestions for evaluating compliance.
If appropriate, compliance with exposure guidelines for
mobile and unlicensed devices can be accomplished
by the use of warning labels and by providing users
with information concerning minimum separation distances from transmitting structures and proper installation of antennas.
The following statement must be included as a CAUTION statement in manuals and OEM products to alert
users of FCC RF exposure compliance:
To satisfy FCC RF Exposure requirements for mobile
and base station transmission devices, a separation
distance of 20 cm or more should be maintained
between the antenna of this device and persons during operation. To ensure compliance, operation at
closer than this distance is not recommended.
The antenna(s) used for this transmitter must not be
co-located or operating in conjunction with any other
antenna or transmitter.
If the RN52 module is used in a portable application
(i.e., the antenna is less than 20 cm from persons during operation), the integrator is responsible for performing Specific Absorption Rate (SAR) testing in
accordance with FCC rules 2.1091.
3.1.3
HELPFUL WEB SITES
Federal
Communications
http://www.fcc.gov
Commission
(FCC):
FCC Office of Engineering and Technology (OET) Laboratory Division Knowledge Database (KDB):
http://apps.fcc.gov/oetcf/kdb/index.cfm
3.2
Canada
The RN52 module has been certified for use in Canada
under Industry Canada (IC) Radio Standards Specification (RSS) RSS-210 and RSSGen. Modular approval
permits the installation of a module in a host device
without the need to recertify the device.
3.2.1
LABELING AND USER
INFORMATION REQUIREMENTS
Labeling Requirements for the Host Device (from Section 3.2.1, RSS-Gen, Issue 3, December 2010): The
host device shall be properly labeled to identify the
module within the host device.
www.rovingnetworks.com
The Industry Canada certification label of a module
shall be clearly visible at all times when installed in the
host device, otherwise the host device must be labeled
to display the Industry Canada certification number of
the module, preceded by the words “Contains transmitter module”, or the word “Contains”, or similar wording
expressing the same meaning, as follows:
Contains transmitter module IC: 6514A-RN52
User Manual Notice for License-Exempt Radio Apparatus (from Section 7.1.3 RSS-Gen, Issue 3, December
2010): User manuals for license-exempt radio apparatus shall contain the following or equivalent notice in a
conspicuous location in the user manual or alternatively on the device or both:
This device complies with Industry Canada licenseexempt RSS standard(s). 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) l'appareil ne doit pas produire
de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même
si le brouillage est susceptible d'en compromettre le
fonctionnement.
Transmitter Antenna (from Section 7.1.2 RSS-Gen,
Issue 3, December 2010): User manuals for transmitters shall display the following notice in a conspicuous
location:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type
and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio
interference to other users, the antenna type and its
gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that
necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec
une antenne d'un type et d'un gain maximal (ou
inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il
faut choisir le type d'antenne et son gain de sorte
que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne dépasse pas l'intensité nécessaire à
l'établissement d'une communication satisfaisante.
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RN52-DS
The above notice may be affixed to the device instead
of displayed in the user manual.
3.2.2
HELPFUL WEB SITES
Industry Canada: http://www.ic.gc.ca/
3.3
Europe
The RN52 module is an R&TTE Directive assessed
radio module that is CE marked and has been manufactured and tested with the intention of being integrated into a final product.
3.3.2
ANTENNA REQUIREMENTS
From R&TTE Compliance Association document Technical Guidance Note 01:
Provided the integrator installing an assessed
radio module with an integral or specific antenna
and installed in conformance with the radio module manufacturer’s installation instructions
requires no further evaluation under Article 3.2
of the R&TTE Directive and does not require further involvement of an R&TTE Directive Notified
Body for the final product. [Section 2.2.4]
The RN52 module has been tested to R&TTE Directive
1999/5/EC Essential Requirements for Health and
Safety (Article (3.1(a)), Electromagnetic Compatibility
(EMC) (Article 3.1(b)), and Radio (Article 3.2) and are
summarized in Table 3-1: European Compliance Testing. A Notified Body Opinion has also been issued. All
test reports are available on the RN52 product web
page at http://www.microchip.com.
3.3.3
The R&TTE Compliance Association provides guidance on modular devices in document Technical Guidance Note 01 available at http://www.rtteca.com/html/
download_area.htm.
Additional helpful web sites are:
Note:
To maintain conformance to the testing
listed in Table 3-1, the module shall be
installed in accordance with the installation instructions in this data sheet and
shall not be modified.
When integrating a radio module into a
completed
product
the
integrator
becomes the manufacturer of the final
product and is therefore responsible for
demonstrating compliance of the final
product with the essential requirements of
the R&TTE Directive.
3.3.1
HELPFUL WEB SITES
A document that can be used as a starting point in
understanding the use of Short Range Devices (SRD)
in Europe is the European Radio Communications
Committee (ERC) Recommendation 70-03 E, which
can be downloaded from the European Radio Communications Office (ERO) at: http://www.ero.dk/.
• Radio and Telecommunications Terminal Equipment (R&TTE):
http://ec.europa.eu/enterprise/rtte/index_en.htm
• European Conference of Postal and Telecommunications Administrations (CEPT):
http://www.cept.org
• European Telecommunications Standards Institute (ETSI):
http://www.etsi.org
• European Radio Communications Office (ERO):
http://www.ero.dk
• The Radio and Telecommunications Terminal
Equipment Compliance Association (R&TTE CA):
http://www.rtteca.com/
LABELING AND USER
INFORMATION REQUIREMENTS
The label on the final product which contains the RN52
module must follow CE marking requirements. The
R&TTE Compliance Association Technical Guidance
Note 01 provides guidance on final product CE marking.
www.rovingnetworks.com
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RN52-DS
TABLE 3-1:
EUROPEAN COMPLIANCE TESTING
Certification
Safety
Standards
Article
Laboratory
Report Number
Date
EN 60950-1:2006+A11:2009+A1:2010 (3.1(a))
Health
EN 50371:2002-03
EMC
EN 301 489-1 V1.8.1 (2008-04)
Radio
EN 300 328 V1.7.1 (2006-10)
(3.1(b))
EN 301 489-17 V2.1.1 (2009-05)
(3.2)
Notified Body
Opinion
DoC
3.4
Australia
The Australia radio regulations do not provide a modular approval policy similar to the United States (FCC)
and Canada (IC). However, RN52 module RF transmitter test reports can be used in part to demonstrate compliance
in
accordance
with
ACMA
Radio
communications “Short Range Devices” Standard
2004 (The Short Range Devices standard calls up the
AS/NZS 4268:2008 industry standard). The RN52
module test reports can be used as part of the product
certification and compliance folder. For more information on the RF transmitter test reports, contact Microchip Technology Australia sales office.
To meet overall Australian final product compliance, the
developer must construct a compliance folder containing all relevant compliance test reports e.g. RF, EMC,
electrical safety and DoC (Declaration of Conformity)
etc. It is the responsibility of the integrator to know what
is required in the compliance folder for ACMA compliance. All test reports are available on the RN52 product
web page at http://www.microchip.com. For more information on Australia compliance, refer to the Australian
Communications and Media Authority web site
http://www.acma.gov.au/.
3.4.1
Information on the New Zealand short range devices
license can be found in the following web links:
http://www.rsm.govt.nz/cms/licensees/types-oflicence/general-user-licences/short-range-devices
and
http://www.rsm.govt.nz/cms/policy-and-planning/spectrum-policy-overview/legislation/gazette-notices/product-compliance/radiocommunications-radiostandardsnotice-2010.
To meet overall New Zealand final product compliance,
the developer must construct a compliance folder containing all relevant compliance test reports e.g. RF,
EMC, electrical safety and DoC (Declaration of Conformity) etc. It is the responsibility of the developer to
know what is required in the compliance folder for New
Zealand Radio communications. For more information
on New Zealand compliance, refer to the web site
http://www.rsm.govt.nz/.
3.5.1
HELPFUL WEB SITES
The Australian Communications and Media Authority:
www.acma.gov.au/.
3.5
as part of the product certification and compliance
folder. All test reports are available on the RN52 product web page at http://www.microchip.com. For more
information on the RF transmitter test reports, contact
Microchip Technology sales office.
HELPFUL WEB SITES
Radio Spectrum Ministry of Economic Development:
http://www.rsm.govt.nz/.
New Zealand
The New Zealand radio regulations do not provide a
modular approval policy similar to the United States
(FCC) and Canada (IC). However, RN52 module RF
transmitter test reports can be used in part to demonstrate compliance against the New Zealand “General
User Radio License for Short Range Devices”. New
Zealand Radio communications (Radio Standards)
Notice 2010 calls up the AS / NZS 4268:2008 industry
standard. The RN52 module test reports can be used
www.rovingnetworks.com
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RN52-DS
4.0
ORDERING INFORMATION
Table 4-1 provides ordering information for the RN52
module.
TABLE 4-1:
ORDERING INFORMATION
Part Number
RN52-I/RM
Description
Standard application firmware (A2DP/AVRCP/SPP) master and slave).
For other configurations, contact Roving Networks directly.
Go to http://www.rovingnetworks.com for current pricing and a list of distributors carrying Roving Networks
products.
5.0
DOCUMENT REVISION
HISTORY
5.1
Version 1.1
• Updated pin information.
• Added more details on RN52 layout o host PCB.
5.2
Version 1.0
Initial release.
This device has not been authorized
as required by the rules of the Federal
Communications Commission. This
device is not, and may not be, offered
for sale or lease, or sold or leased,
until authorization is obtained.
Copyright © 2013 Roving Networks. All rights reserved. Roving Networks
is a registered trademark of Roving Networks. Apple Inc., iPhone, iPad,
iTunes, Made for iPhone are registered trademarks of Apple Computer.
Roving Networks reserves the right to make corrections, modifications,
and other changes to its products, documentation and services at any
time. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
Roving Networks assumes no liability for applications assistance or customer’s product design. Customers are responsible for their products and
applications that use Roving Networks components. To minimize customer product risks, customers should provide adequate design and operating safeguards.
Roving Networks, Inc.
102 Cooper Court
Los Gatos, CA 95032
+1 (408) 395-5300
www.rovingnetworks.com
www.rovingnetworks.com
Roving Networks products are not authorized for use in safety-critical
applications (such as life support) where a failure of the Roving Networks
product would reasonably be expected to cause severe personal injury or
death, unless officers of the parties have executed an agreement specifically governing such use.
Version 1.1r 3/20/13
Advanced Information
page 18
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