Microchip Technology RN52 Users manual

Download

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

S interface

and I

• Castellated SMT pads for easy and reliable PCB mounting

• Environmentally friendly, RoHS compliant

• Certifications: FCC, ICS, CE

• Bluetooth SIG certified

RN52 Block Diagram:

RN52

2 LEDs

MIC

PCB Antenna

Bluetooth 3.0 RF Baseband

Audio DSP

16-Bit Stereo

CODEC

RN52-DS

Speake

UART

USB

Applications:

• High-quality, 2-channel audio streaming

• Wireless stereo headsets

I2S

S/PDIF

16-Bit RISC MCU

16-MBit Flash

11 GPIO

Pins

1 AIO

• 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

www.rovingnetworks.com Version 1.1 3/19/13 page 1

Advanced Information

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.

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.

Ta bl e 1 -1 provides the general specifications for the

module. Ta b le 1 -2 and Table 1-3 provide the module’s weight, dimensions, and electrical characteristics.

TABLE 1-1: GENERAL SPECIFICATIONS

Specification Description

Standard 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 1.1 3/19/13 page 2

Advanced Information

FIGURE 1-1: MODULE DIMENSIONS

0.00

2.55

0.85

3.75

4.95

6.15

7.35

8.55

9.75

10.95

12.65

13.50

0.0

26.00

PCB Outline: +/- 0.13 mm PCB Thickness: +/- 0.100 mm

Tolerances:

(Top View)

Dimensions are in millimeters

21.20

21.40

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

(Side View)

26.00

21.40

0.70

0.00

0.80

2.70

0.75

12.75

0.8mm

1.6mm

0.80mm

Dimensions are in millimeters

0.00

2.55

0.85

3.75

4.95

6.15

7.35

8.55

9.75

10.95

12.65

13.50

0.0

26.00

21.20

21.40

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

3.25

4.65

6.05

7.45

8.85

10.25

20.70

Ground Pads

0.8 x 1.0 mm

Host Ground Plane Edge (See Mounting Details)

(Top View)

RN52-DS

FIGURE 1-2: RECOMMENDED PCB FOOTPRINT

www.rovingnetworks.com Version 1.1 3/19/13 page 3

Advanced Information

Figure 1-3 shows the pinout and Ta bl e 1- 4 describes

RN52

Top View

GND

GPIO7

GPIO6

PWREN

VDD

PCM_IN

PCM_OUT

PCM_SYNC

PCM_CLK

GND

GND GPIO3 GPIO2 AICO0 GPIO4 GPIO5 GPIO12 GPIO13 GPIO11 GPIO10 GPIO9 USBDUSBD+ UART_RTS UART_CTS UART_TX UART_RX

GND

SPKR_L+

SPKR_R+

SPKR_L-

SPKR_R-

AGND

MIC_R-

MIC_L-

MIC_R+

MIC_L+

MIC_BIAS

LED0 LED1

SPI_MOSI

SPI_SCK

SPI_MISO

SPI_SS

GND

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17

44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28

19202122232425

5049484746

the module’s pins.

FIGURE 1-3: PIN DIAGRAM

RN52-DS

TABLE 1-4: PIN DESCRIPTION (PART 1 OF 3) Note 1

Pin Symbol I/O Type Description Direction Default

1 GND Ground. Ground. 2 GPIO3 Bidirectional with program-

mable strength internal pull-up/down.

3 GPIO2 Bidirectional with program-

4 AIO0 Bidirectional. Analog programmable input/output line. I/O 5 GPIO4 Bidirectional with program-

mable strength internal pull-up/down.

www.rovingnetworks.com Version 1.1 3/19/13 page 4

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.

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.

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.

Advanced Information

Input Low

Output High

Input Low

RN52-DS

TABLE 1-4: PIN DESCRIPTION (PART 2 OF 3) Note 1

Pin Symbol I/O Type Description Direction Default

6 GPIO5 Bidirectional with program-

mable strength internal pull-up/down.

7 GPIO12 Bidirectional with program-

mable strength internal pull-up/down.

8 GPIO13 Bidirectional with program-

mable strength internal pull-up/down.

9 GPIO11 Bidirectional with program-

mable strength internal pull-up/down.

10 GPIO10 Bidirectional with program-

mable strength internal pull-up/down.

11 GPIO9 Bidirectional with program-

mable strength internal pull-up/down.

12 USBD- Bidirectional. USB data minus. I/O 13 USBD+ Bidirectional. USB data plus with selectable internal 1.5-Kohm

14 UART_RTS CMOS output, tri-state, with

weak internal pull-up.

15 UART_CTS CMOS input with weak

internal pull-down.

16 UART_TX CMOS output, tri-state, with

weak internal pull-up.

17 UART_RX CMOS input with weak

internal pull-down.

18 GND Ground. Ground. 19 GPIO7 Bidirectional with program-

mable strength internal pull-up/down.

20 GPIO6 Bidirectional with program-

mable strength internal pull-up/down.

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.

24 PCM_OUT CMOS input, with weak

internal pull down.

25 PCM_SYNC Bidirectional with weak

internal pull down.

26 PCM_CLK CMOS input, with weak

internal pull down.

Programmable I/O. I/O High

When you drive this signal low, the module’s

Input High UART goes into command mode. If this signal floats high, the UART is in data mode. Reserved. Not available for use at runtime.

I/O

pull-up resistor.

UART request to send active low. Output

UART clear to send active low. Input

UART data output. Output

UART data input. Input

Driving this pin low sets the UART baud rate to

I/O High 9,600. By default the pin is high with a baud rate of 115,200.

Programmable I/O. I/O High

Synchronous data input, configurable for SPDIF_IN or SD_IN (I

Synchronous data input, configurable for SPDIF_OUT or SD_OUT (I

S).

Input

Synchronous data sync; WS (I2S). I/O

Synchronous data clock; SCK (I

S). Input

www.rovingnetworks.com Version 1.1 3/19/13 page 5

Advanced Information

RN52-DS

TABLE 1-4: PIN DESCRIPTION (PART 3 OF 3) Note 1

Pin Symbol I/O Type Description Direction Default

27 GND Ground. Ground. 28 SPI_SS CMOS input with weak

internal pull-up.

29 SPI_MISO CMOS output, tri-state, with

weak internal pull-down.

30 SPI_CLK Input with weak internal

pull-down.

31 SPI_MOSI CMOS input, with weak

internal pull-down.

32 LED1 Open drain output. Drives an LED. For the RN-52-EK board, this

33 LED0 Open drain output. Drives an LED. For the RN-52-EK board, this

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). Output 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.

Note 1: All GPIO pins default to input with weak pull-down.

Chip select for Synchronous Serial Interface active low.

Serial Peripheral Interface (SPI) output. Output

SPI clock. Input

SPI input. Input

signal drives the red LED.

signal drives the blue LED.

Input

Output

1.1 Audio Interface Circuit Description

The RN52 audio interface circuit consists of:

• Stereo audio CODEC

• Dual audio inputs and dual outputs

• Configurable S/PDIF and I

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.

www.rovingnetworks.com Version 1.1 3/19/13 page 6

S interface

Advanced Information

1.1.1 STEREO AUDIO CODEC INTERFACE

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 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.

FIGURE 1-4: RN52 AUDIO INTERFACE BLOCK DIAGRAM

SPK_L+

SPK_L-

SPK_R+

SPK_R-

MIC_L+

MIC_L-

MIC_R+

MIC_R-

MIC_BIAS

RN52

Audio

MIC &

Bias

System

Mainboard

S/PDIF & I2S

SPK_L+

SPK_L-

MIC_L+

MIC_L-

Input

Amplier

Output

Amplier

SPK_R+

SPK_R-

MIC_R+

MIC_R-

Input

Amplier

Output

Amplier

ΣΔ-ADC

LP Filter

Digital

Circuitry

DAC

RN52

RN52-DS

FIGURE 1-5: STEREO CODEC AUDIO INPUT/OUTPUT STAGES

www.rovingnetworks.com Version 1.1 3/19/13 page 7

Advanced Information

RN52-DS

–

Gain 0:7Line Mode/Microphone Mode

Microphone Mode Input Impedance = 6 kΩ Line Mode Input Impedance = 6 kΩ to 30 kΩ

Bypass or 24-dB Gain -3 to 18 dB Gain

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

• 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.

• 11.025 kHz

• 16 kHz

FIGURE 1-6: ADC ANALOG AMPLIFIER BLOCK DIAGRAM

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

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.

• 22.05 kHz

• 24 kHz

• 32 kHz

• 44.1 kHz

www.rovingnetworks.com Version 1.1 3/19/13 page 8

Advanced Information

RN52-DS

RN52

Good

Acceptable

Bad

2.0 APPLICATIONS

2.1 Minimizing Radio Interference

When laying out the host PCB for the RN52 module, 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.

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 perfor-

mance, the RN52 module’s antenna end should pro-

trude at least 31 mm beyond any metal enclosure.

Figure 2-2 shows examples of good, bad, and accept-

able positioning of the RN52 on the host PCB.

FIGURE 2-1: MINIMIZING RADIO INTERFERENCE

(Top View)

31 mm

Edge of Ground Plain

4.6 mm

Keep area around antenna (approximately 31 mm) clear of metallic structures for best performance

31 mm

21.4 mm

Dimensions are in millimeters

FIGURE 2-2: PCB EXAMPLE LAYOUT

www.rovingnetworks.com Version 1.1 3/19/13 page 9

Advanced Information

RN52-DS

VDD

LED Forward Voltage, V

Resistor Voltage Drop, V

Pad Voltage, V

PAD

LED

LED0 or LED1

RON = 20 Ω

2.2 LED Interface

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, I LED. The current is also dependent on the external voltage, VDD, as shown in Figure 2-3.

FIGURE 2-3: LED INTERFACE

LED

, in the

2.3 Device Firmware Updates

The module has a device firmware update (DFU) mode

in which you use the USB interface to update the firm-

ware. 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: USB DFU PORT & GPIO3

SCHEMATIC

VBUS (3.3V)

MTAB

GPIO3

R2 47k

22k

10nF

USBDUSBD+

MBR120

VBUS

D-

D+

GND

USB Mini B Connector

(JAE DX2R005HN2E700)

2.4 Restore Factory Defaults with GPIO4

The LEDs can be used to indicate the module’s connection status. Ta bl e 2 -1 describes the LED functions.

TABLE 2-1: STATUS LED FUNCTIONS

Blue LED Red LED Description

Flashing Flashing The RN52 module is discover-

able.

Off Flashing The module is connected.

Flashing Off The module is connectable.

www.rovingnetworks.com Version 1.1 3/19/13 page 10

Advanced Information

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.

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

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 Ta b le 2 - 2 .

Note: Use no-clean flux and DO NOT water

wash

TABLE 2-2: PASTE SOLDER RECOMMENDATIONS

Manufacturer Alpha Metals

http://www.alphametals.com

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 tem-

perature profiles.

NIHON ALMIT Co. LTD http://almit.co.jp

FIGURE 2-5: SOLDER REFLOW TEMPERATURE PROFILE

www.rovingnetworks.com Version 1.1 3/19/13 page 11

Advanced Information

FIGURE 2-6: SOLDER REFLOW CURVE

RN52-DS

www.rovingnetworks.com Version 1.1 3/19/13 page 12

Advanced Information

RN52-DS

VBUS

RESET

3V3O UT

USBDP

USBDM

GND

CBUS210CBUS1

VCCIO

CBUS311CBUS4

CBUS0

GND

RI3DCD7DSR6DTR31CTS8RTS32RXD2TXD

VCC

OSCI

OSCO

AGND

TEST

GND

THPAD

FT232RQ

GND5D+3D-2VBUS

MTAB

USB Mini B / CSR UART

12345

SPI MASTER

SPI_MI SO

SPI_MOSI

SPI_SCK

SPI_SS

3.3V

UART_RX

UART_TX

UART_CTS

UART_RTS

Vin

GND

Vout

Tab

TC1262-3.3V U2

1uF

VBUS 3.3V

100nFC3100nF

100nF

Blue LED

Red LED

Vol Down

Play / Pause

Vol Up

BTN_VOL UP

BTN_VOL DOWN

BTN_NEXT

BTN_PL AY

BTN_PREVI OUS

47R

470

3.3V

GND5D+3D-2VBUS

MTAB

USB Mini B / RSVD USB

GPIO45GPIO5

GPIO127GPIO138GPIO119GPIO10

GPIO9

USBD-

USBD+

UART_RTS

UART_CTS

UART_TX

PCM_CL K

SPI_SS28SPI_MISO29SPI_SCK

PCM_IN

VDD

LED033MIC_BIAS34MIC_L+35MIC_R+36MIC_L-37MIC_R-

PCM_OUT

GPIO7

PCM_SY NC

SPI_MOSI31LED1

PWRE N

GPIO6

UART_RX

AIO0

GPIO2

AGND39SPKR_R-

GND

GPIO3

SPKR_L-

GND

SPKR_R+42SPKR_L +

RN52 Module

PIO7

PIO6

LED0

LED1

LED0

LED1

VBUS

USBD-

USBD+

SPI_MI SO

SPI_MOSI

SPI_SCK

SPI_SS

3.3V

SPKR_R-

SPKR_L -

SPKR_R+

SPKR_L +

Wake

3.3V

PCM_CLK

PCM_SYNC

PCM_OUT

PCM_IN

SPKR_R-

SPKR_L -

SPKR_R+

SPKR_L +

VBUS

47k

22k

PIO3

1uF

C21

1uF

C22

1uF

C13

1uF

C14

1uF

C12

2k2

47nFC847nF

C10

47nF

C11

47nF

MIC_L

MIC_R

1uF

C18

22k

R17

22k

R15

47k

R11

22k

R13

47k

R14

47k

R10

47k

R16

22k

R12

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

EXT Connector

PCM_CL K

PCM_SYNC

PCM_OUT

PCM_I N

3.3V

IN1+3IN1-

Vo2

BYPASS4IN2-8IN2+

SHUTDOWN

GND

VDD

Vo1

PAD

TPA6112

100uF

C23

100uF

C20

100uF

C17

100uF

C19

10uF

C15

100nF

C16

MBR120

10nF

VBUS

PIO9

3.3V

BTN_VOLDOWN

BTN_PREVIOUS

BTN_PLAY

BTN_NEXT

BTN_VOLUP

PIO2

PIO6

PIO7

MICL

MICR

MIC_L

MIC_R

J11

Battery

VBUS

1234567891011

J10

1 2

3 4

5 6

7 8

9 10

PIO4

PWREN

SPKR_R-

SPKR_L -

SPKR_R+

SPKR_L +

MIC_BI AS

MIC_L +

MIC_R+

MIC_L -

MIC_R-

MIC_ L +

MIC_R+

MIC_ L -

MIC_R-

MIC_B I AS

AI O0

UART_RX

UART_TX

UART_CTS

UART_RTS

USBD-

USBD+

BTN_VOLUP

BTN_VOLDOWN

BTN_NEXT

BTN_PLAY

BTN_PREVIOUS

PIO3

PIO9

PIO2

PIO4

AI O0

MIC_L +

MIC_R+

MIC_L -

MIC_R-

MIC_BI AS

35421

Mic

35421

Headphones

2k2R70

UART_RX

UART_TX

Device

Firmware

Update

2.6 Typical Application Schematic

Figure 2-7 shows a typical application circuit with LDO,

stereo audio/microphone PA, USB/UART, AVRCP switches, and LED0/LED1.

FIGURE 2-7: TYPICAL APPLICATION CIRCUIT FOR A2DP AUDIO STREAMING & AVRCP

REMOTE CONTROL

www.rovingnetworks.com Version 1.1 3/19/13 page 13

Advanced Information

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 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 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

installed must also display a label referring to the enclosed module. This exterior label can use wording as follows:

Contains Transmitter Module FCC ID: T9J-RN52

Contains FCC ID: T9J-RN52

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 Version 1.1 3/19/13 page 14

Advanced Information

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 Commission (FCC):

http://www.fcc.gov

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.

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.

www.rovingnetworks.com Version 1.1 3/19/13 page 15

Advanced Information

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.

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.

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.

Note: To maintain conformance to the testing

listed in Ta bl e 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.

3.3.2 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]

3.3.3 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/.

Additional helpful web sites are:

• 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/

3.3.1 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 Version 1.1 3/19/13 page 16

Advanced Information

RN52-DS

TABLE 3-1: EUROPEAN COMPLIANCE TESTING

Certification Standards Article Laboratory Report Number Date

Safety 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) (3.1(b))

EN 301 489-17 V2.1.1 (2009-05)

Radio EN 300 328 V1.7.1 (2006-10) (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 HELPFUL WEB SITES

The Australian Communications and Media Authority:

www.acma.gov.au/.

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.

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

Radio Spectrum Ministry of Economic Development:

http://www.rsm.govt.nz/.

3.5 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 Version 1.1 3/19/13 page 17

Advanced Information

4.0 ORDERING INFORMATION

Ta bl e 4 - 1 provides ordering information for the RN52

module.

TABLE 4-1: ORDERING INFORMATION

Part Number Description

RN52-I/RM 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

RN52-DS

• 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 Version 1.1 3/19/13 page 18

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.

Advanced Information

Microchip Technology RN52 Users manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Features:

RN52 Block Diagram:

Applications:

1.0 DEVICE OVERVIEW

FIGURE 1-1: MODULE DIMENSIONS

FIGURE 1-2: RECOMMENDED PCB FOOTPRINT

FIGURE 1-3: PIN DIAGRAM

1.1 Audio Interface Circuit Description

1.1.1 STEREO AUDIO CODEC INTERFACE

FIGURE 1-4: RN52 AUDIO INTERFACE BLOCK DIAGRAM

FIGURE 1-5: STEREO CODEC AUDIO INPUT/OUTPUT STAGES

1.1.2 ANALOG-TO-DIGITAL CONVERTER (ADC)

FIGURE 1-6: ADC ANALOG AMPLIFIER BLOCK DIAGRAM

1.1.3 DIGITAL-TO-ANALOG CONVERTER (DAC)

1.1.4 MICROPHONE INPUT

2.0 APPLICATIONS

2.1 Minimizing Radio Interference

FIGURE 2-1: MINIMIZING RADIO INTERFERENCE

FIGURE 2-2: PCB EXAMPLE LAYOUT

2.2 LED Interface

FIGURE 2-3: LED INTERFACE

2.3 Device Firmware Updates

2.4 Restore Factory Defaults with GPIO4

2.5 Solder Reflow Profile

FIGURE 2-5: SOLDER REFLOW TEMPERATURE PROFILE

FIGURE 2-6: SOLDER REFLOW CURVE

2.6 Typical Application Schematic

3.0 REGULATORY APPROVAL

3.1 United States

3.1.1 LABELING AND USER INFORMATION REQUIREMENTS

3.1.2 RF EXPOSURE

3.1.3 HELPFUL WEB SITES

3.2 Canada

3.2.1 LABELING AND USER INFORMATION REQUIREMENTS

3.2.2 HELPFUL WEB SITES

3.3 Europe

3.3.2 ANTENNA REQUIREMENTS

3.3.3 HELPFUL WEB SITES

3.3.1 LABELING AND USER INFORMATION REQUIREMENTS

3.4 Australia

3.4.1 HELPFUL WEB SITES

3.5.1 HELPFUL WEB SITES

3.5 New Zealand

4.0 ORDERING INFORMATION

5.1 Version 1.1

5.2 Version 1.0