bm23 bluetooth evaluation board user s guide · bm23 bluetooth evalutation board user’s guide...

Preliminary Edition 2015 Microchip Technology Inc. page 1

BM23 Bluetooth® Evaluation Board User’s Guide

BM23 BLUETOOTH

EVALUTATION BOARD USER’S GUIDE


Index

Preface .................................................................................... Error! Bookmark not defined.

1 OVERVIEW ...................................................................................................................... 5

1.1 INTRODUCTION...................................................................................................................................... 5 1.2 BM23 EVALUATION BOARD FEATURES .............................................................................................. 5 1.3 BM23 EVALUATION BOARD CONTENTS .............................................................................................. 7

2. Getting Started ............................................................................................................. 10

2.1 INTRODUCTION.................................................................................................................................... 10 2.2 HARDWARE REQUIREMENTS ............................................................................................................ 10 2.3 APPLICATION DEMONSTRATION ....................................................................................................... 10 2.4 SOFTWARE/UTILITY REQUIREMENTS .............................................................................................. 13 2.5 MODULE CONFIGURATION ................................................................................................................. 25

APPENDIX A. BM23 AUDIO EVALUATION BOARD SCHEMATICS ............................... 26

APPENDIX B. CLASS D AMPLIFIER DAUGHTER BOARD ............................................ 37

BM23 BLUETOOTH



PREFACE

INTRODUCTION

This chapter contains general information that will be useful to know before using the

Product Name. Items discussed in this chapter include:

Document Layout

Recommended Reading

The Microchip Web Site

Customer Support

Document Revision History

DOCUMENT LAYOUT

This user’s guide describes how to use the BM23 Bluetooth Evaluation Board. The document is organized as

follows:

Chapter 1. “Overview” – This chapter introduces the BM23 Bluetooth Evaluation Board and provides an

overview of various features.

Chapter 2. “Getting Started” – This chapter describes

The hardware components and setup of the BM23 Bluetooth Evaluation Board.

The application demonstrations of the BM23 Bluetooth Evaluation Board.

Software/Utility Requirements of the BM23 Bluetooth Evaluation Board.

Appendix A. “BM23 Audio Evaluation Board Schematics” – This appendix includes a schematic of the

BM23 Bluetooth Evaluation Board.

RECOMMENDED READING

This user’s guide describes how to use the BM23 Bluetooth Evaluation Board. Other useful documents are

listed below. The following Microchip documents are available and recommended as supplemental reference

resources:

STEREO Module Data Sheet (DSxxxxxxxx)

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at http://www.microchip.com. This

web site is used as a means to make files and information easily available to

customers. Accessible by using your favorite Internet browser, the web site contains

the following information:

Product Support – Data sheets and errata, application notes and sample programs, design resources,

user’s guides and hardware support documents, latest software releases and archived software

General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online

discussion groups, Microchip consultant program member listing

Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of

seminars and events, listings of Microchip sales offices, distributors and factory representatives

BM23 BLUETOOTH



CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

Distributor or Representative

Local Sales Office

Field Application Engineer (FAE)

Technical Support

Customers should contact their distributor, representative or Field Application Engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com

DOCUMENT REVISION HISTORY

Revision A (Aug 2015)

This is the initial released version of this document.

BM23 BLUETOOTH



1 OVERVIEW

1.1 INTRODUCTION This user’s guide describes the hardware and software setup for the BM23 Bluetooth® Evaluation Board.

This board contains the hardware needed to evaluate the BM23 Bluetooth module. The BM23 module is

mounted to an evaluation board that demonstrates the module’s key features. The evaluation board

contains:

PIC18 MCU and YAMAHA YDA174 DSP on board

12 push buttons to control audio playback

Status LEDs

The BM23 supports the following Bluetooth profiles: A2DP, AVRCP, and HFP/HSP

A2DP stereo audio (Sink mode support for Sub-Band Coding (SBC)),

AVRCP media player remote control

HFP/HSP for accepting a phone call support.

For data sheet and other details related to BM23 module, refer to the Microchip web

site at http://www.microchip.com.

This chapter discusses the following topics:

BM23 Evaluation Board Features

BM23 Evaluation Board Contents and Part Details

1.2 BM23 EVALUATION BOARD FEATURES The BM23 Evaluation Board has the following features:

Fully qualified Bluetooth version 4.1 module, fully compatible with Bluetooth version 3.0, 2.0, 1.2

system.

Embedded BM23 module with postage-stamp size form factor of 15 x 29 x 2.5 mm (include shielding

case)

Embedded Bluetooth stack profiles: A2DP, AVRCP, and HFP/HSP

Stereo audio output for highest quality audio

Castellated SMT pads for easy and reliable PCB mounting

Environmentally friendly, RoHS compliant

Bluetooth SIG certified

Integrate MCU and DSP on board for easy function and feature demonstration.

BM23 BLUETOOTH



BM23 BLUETOOTH



1.3 BM23 EVALUATION BOARD CONTENTS BM23 Evaluation Board contains the following components as shown in Figure 1-1 which describes the

evaluation board’s interfaces and connectors. Table 1-1 describes the various components of the evaluation

board.

FIGURE 1-1: BM23 EVALUATION BOARD

BM23 BLUETOOTH



MIC (JP23) ICSP (J5)

Pin Description Pin Description

1 MIC_P1 1 Reset

2 AGND 2 ICD3 power

3 MIC_N1 3 GND

4 PGD

5 PGC

6 NC

1 2 3 1 2 3 4 5 6

BM23 BLUETOOTH



TABLE 1-1:BM23 EVALUATION BOARD HARDWARE

Hardware Component Description

BM23 Bluetooth® 4.1 Module

USB Connector USB to UART for EEPROM R/W for BM23.

15V Adapter Jack Connect to 15V adapter (P2) for main power source of whole system.

Amplifier Audio Out External AMP Connector JP6 / 7

Audio In Audio 3.5 mm jack for Mono microphone input(P6) and AUX input(P8)

Status LEDs Red and Blue LEDs show the pairing/connection status

MFB Button Switch to turn on/off BM23 module (SW24)

Play/Pause Button Button to play or pause the audio playback (SW31)

Previous Track Button Button to skip track backwards (SW23)

Next Track Button Button to skip track forwards(SW45)

Volume Up Button Button to increase volume (SW27)

Volume Down Button Button to decrease volume (SW28)

Reset Button Reset BM23 (SW10); Reset MCU (SW1)

BM23 BLUETOOTH



2. Getting Started 2.1 INTRODUCTION This chapter describes how the BM23 Evaluation Board works. Certain hardware and utilities are essential to

support the evaluation/development of demo applications. This chapter discusses the following topics:

Hardware Requirements

Software/Utility Requirements

Module Configuration

2.2 HARDWARE REQUIREMENTS

2.2.1 HARDWARE SETUP To setup the evaluation hardware, perform the following steps:

1. Make sure pin 1 / 2 / 3 of “SW9” in “Off / Off / On” state make .system in application mode.

2. Connect the speaker line to the amplifier output connector (J6 / 7).

2.2.2 USING THE EVALUATION BOARD 1. Connect 15V adapter P2.

2. Click MFB button to turn-on and enter pairing mode. The status LEDs will blink. Now the BM23 Evaluation

board should be discoverable.

3. Turn on Bluetooth device manager on a host device (PC or smartphone), the host device will display a list

of discoverable Bluetooth devices. Select the device and connect with it.

4. If the pairing with the device is successful, BM23 evaluation board can connect to the host device. Once

connected, BM23 evaluation board enables Advanced Audio Distribution Profile (A2DP) for audio

playback and Audio Video Remote Control Profile (AVRCP) for player control.

2.3 APPLICATION DEMONSTRATION

2.3.1 AUDIO DEMONSTRATION In this demonstration, user can play an audio stream on both BM23 evaluation boards using a computer or

smartphone. The following are the steps to perform the demonstration.

1. Connect BM23 evaluation board to a host device (PC or smartphone) that has an audio source.

2. Connect speakers to BM23 evaluation board J6 / 7.

3. Open the audio source on the host device. Microchip recommends using media player.(e.g. Microsoft

Media Player, iTunes, and Android).

4. Start the audio stream on the media player.

When BM23 evaluation board is connected to an audio source compatible with Bluetooth AVRCP, the audio

control buttons are use to:

Control the volume of audio output.

Go to the previous track.

BM23 BLUETOOTH



Go to the next track.

Start / stop playing the current track.

FIGURE 1-2: BM23 EVALUATION BOARD AUDIO CONTROL BUTTONS

BM23 BLUETOOTH



2.3.2 HSP/HFP DEMONSTRATION In this demonstration, user can explore the hands-free profile setting to receive an incoming voice call from a

paired smartphone. This demonstration requires a microphone. It would be good to use a PC

headset/microphone (with two-plugs). The following are the steps to perform the demonstration.

1. Connect the speakers / microphone to BM23 evaluation board’s audio out connector (J6/7) and MIC

input (P6) respectively.

2. Connect BM23 evaluation board to a smartphone that supports the A2DP and HFP/HSP Bluetooth

profiles.

3. From another one phone, initiate a call to the smartphone that is paired with BM23 evaluation board. The

A2DP stream pauses and the ringtone plays on the speakers.

4. Click button “MFB” on BM23 evaluation board to accept the incoming call.

BM23 BLUETOOTH



2.4 SOFTWARE/UTILITY REQUIREMENTS

2.4.1 UI SETTING Step1. Open UI tool

Step2. Firstly, you can load default UI setting or previous setting file.

BM23 BLUETOOTH



Step3. Click “Edit” to modify the settings meet your needs.

Step4. In the main settings, it can enable or disable supported profile or function which system need.

Click “Next” for other setting.

BM23 BLUETOOTH



Step5. You can do system and functional setting in these pages.

Click “Help” you can get more detail information.

Step6. After finish parameter set up, click “Finish” button and a message will remind you check EEPROM

size on your system.

BM23 BLUETOOTH



Step7. Click “Save” button to save these UI parameter as a “.txt” file

Step8. We will use MPET tool to merge it with EEPROM table and use EEPROM tool load these parameter

to system.

BM23 BLUETOOTH



2.4.2 DSP TOOL SETTING Step1. Open DSP tool

Step2. Select IC version ““IS2020_XXX_SHS” (XXX is the version of chip, e.g. IS2020S-203)

Step3. You can setup all voice and audio function in these pages.

BM23 BLUETOOTH



Step4. Click “Save” button to save these DSP parameter as a “.txt” file after finish all DSP setting. Then use MPET tool to merge it with EEPROM table and use EEPROM tool load these parameter to system.

BM23 BLUETOOTH



2.4.3 MERGE TOOL SETTING Step1. Open MPET tool, click “Next” to set up.

Step2. Select “UI Patch Only” to use full EEPROM table to merge UI and DSP parameter.

BM23 BLUETOOTH



Step3. Select the bin file (full EEPROM table) and click “Next”

Step4. If the bin file had included UI, DSP or patch code parameter, you can see them in block 1 as the figure below. If you want keep the in your new system, you can select the item which you want to keep and use “pull down” button to add them to merge list. If you want to add new parameter (e.g. UI and DSP parameter), click “+” button to add these files into tool for merge with EEPROM table.

BM23 BLUETOOTH



Step5. Select an output path and create a name for the merged EEPROM table.

Step6. Click “Generate” button to generate the new EEPROM table.

BM23 BLUETOOTH



Step7. Select if you want use new setting of these parts.

Step8. Now you have a merged patch file (*.ipf file).

BM23 BLUETOOTH



2.4.4 Procedure to Update EEPROM Parameters

Step 1. Make sure SW9 in “ROM TEST” mode. Step 2. Connect EVB “P1” port and PC by USB cable. LED1 & LED2 on EVB will keep lighting. Step 3. Run the E2PROM_tool.exe program and a window will be come up as below

BM23 BLUETOOTH



Step 4. Specify the COM Port.

Step5. Press ”Browse” to choose the file where you want to write EEPROM table or patch file.

Step6. Press” Write” to write these setting to EEPROM

Step7. After finish data update, remove USB cable and make SW9 to “ROM APP” mode and reboot.

Now EVB can use the new setting after updated EEPROM parameter.

BM23 BLUETOOTH



2.5 MODULE CONFIGURATION

2.5.1 Mode Settings Setting in Mode Switch:

For ROM chip application

Mode SW9 Setting Switch 9 PIN Definition

Test Mode

1: ON (P2_0: LOW) 2: OFF (P2_4: HIGH) 3: ON (EAN: HIGH)

Application Mode

1: OFF (P2_0: HIGH) 2: OFF (P2_4: HIGH) 3: ON (EAN: HIGH)

BM23 BLUETOOTH



APPENDIX A. BM23 AUDIO EVALUATION BOARD SCHEMATICS EVB block diagram

BM23 BLUETOOTH



BM23 BLUETOOTH



MIC

_P

1

MIC1

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u/6

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JP

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JP

1x3

1 2 3C

27

220p/5

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C28

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123 45

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N

P2_4

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STS

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2

5V

R6

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1 2

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Break +3.3V to BAT_IN trace

When 5V insert.

AIL

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BM23 BLUETOOTH



BM23 BLUETOOTH



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BM23 BLUETOOTH



BM23 BLUETOOTH



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SDA17

DVDD1818

IRQ_N19

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PROT_N21

SLEEP_N22

MUTE_N23

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GPIO1044

GPIO1143

TESTb42

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OPEN40

DVSS39

REFA38

AVSS37

R12

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DC

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RF

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P_IR

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P_IC

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P_M

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DS

P_S

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DS

P_IC

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DS

P_P

1_3

DS

P_P

1_2

DS

P_P

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P_P

1_3

DS

P_P

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T_N

DS

P_IR

Q_N

C104

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C30

0.2

2u/1

6V

OU

TM

R

OU

TP

R

L6

L22uH

12

L5

L22uH

12

+

C133

1000u/5

0V

1 2

BM23 BLUETOOTH



BM23 BLUETOOTH



MC

U_P

70

MC

U_P

71

R122

3K

12

R123

3K

12

HC

I_R

XD

HC

I_TXD

G

D

SQ2

STS

2306

312

R126

2K

1 2

R127

1K

1 25V

RS

T_N

RS

T_P

IC18

G

D

SQ3

STS

2306

312

ICD

3_P

WR

RS

T_N

R128

1K

1 2

(Reset PIC18 when connect to USB)

(Reset BT when connect to ICD3)

JP

33

JP

1x2 1

2

PG

D

RE

SE

T

3V

3

PG

C

J5

JP

1x6

1 2 3 4 5 6 ICSP

Board

Nam

e

Siz

eTitle

Rev

Date

:S

heet

of

P/N

MC

U_P

IC18

4.0

BM

23 E

VB

B

78

Wednesday

, July

22,

2015

0360

5F

, N

o.5

, In

dustr

y E

. R

d. V

II, H

sin

chu S

cie

nce P

ark

,

Hsin

chu C

ity

30078,

Taiw

an

TE

L.

886-3

-5778385

ICD

3_P

WR

C4

10p/5

0V

(MFB/RX_IND)

(TX_IND)

(UART_TXD)

(UART_RXD)

C125

0.1

u/2

5V

C126

0.1

u/2

5V

X4

XTA

L-3

2.7

68K

HZ

12

3

DP

1D

P-4

21

C114

15p/5

0V

C120

15p/5

0V

T1O

SO

T1O

SI

DP

2D

P-4

21

C3

10p/5

0V

PIC18F85J10

U13

PIC

18F

85J10

RH

2/A

18

1

RH

3/A

19

2

RE

1/A

D9/W

R/P

2C

3

RE

0/A

D8/R

D/P

2D

4

RG

0/E

CC

P3/P

3A

5

RG

1/T

X2/C

K2

6

RG

2/R

X2/D

T2

7

RG

3/C

CP

4/P

3D

8

MC

LR

9

RG

4/C

CP

5/P

1D

10

VS

S11

VD

DC

OR

E/V

CA

P12

RF

7/S

S1

13

RF

6/A

N11

14

RF

5/A

N10/C

VR

EF

15

RF

4/A

N9

16

RF

3/A

N8

17

RF

2/A

N7/C

1O

UT

18

RH

7/A

N15/P

1B

19

RH

6/A

N14/P

1C

20

RH5/AN13/P3B21

RH4/AN12/P3C22

RF1/AN6/C2OUT23

ENVREG24

AVDD25

AVSS26

RA3/AN3/VREF+27

RA2/AN2/VREF-28

RA1/AN129

RA0/AN030

VSS31

VDD32

RA5/AN433

RA4/T0CKI34

RC1/T1OSI/ECCP2/P2A35

RC0/T1OSO/T13CKI36

RC6/TX1/CK137

RC7/RX1/DT138

RJ4/BA039

RJ5/CE40

RJ2/W

RL

60

RJ3/W

RH

59

RB

0/I

NT0/F

LT0

58

RB

1/I

NT1

57

RB

2/I

NT2

56

RB

3/I

NT3/E

CC

P2/P

2A

55

RB

4/K

BI0

54

RB

5/K

BI1

53

RB

6/K

BI2

/PG

C52

VS

S51

OS

C2/C

LK

O50

OS

C1/C

LK

I49

VD

D48

RB

7/K

BI3

/PG

D47

RC

5/S

DO

146

RC

4/S

DI1

/SD

A1

45

RC

3/S

CK

1/S

CL1

44

RC

2/E

CC

P1/P

1A

43

RJ7/U

B42

RJ6/L

B41

RH1/A1780

RH0/A1679

RE2/AD10/CS/P2B78

RE3/AD11/P3C77

RE4/AD12/P3B76

RE5/AD13/P1C75

RE6/AD14/P1B74

RE7/AD15/ECCP2/P2A73

RD0/AD0/PSP072

VDD71

VSS70

RD1/AD1/PSP169

RD2/AD2/PSP268

RD3/AD3/PSP367

RD4/AD4/PSP4/SDO266

RD5/AD5/PSP5/SDI2/SDA265

RD6/AD6/PSP6/SCK2/SCL264

RD7/AD7/PSP7/SS263

RJ0/ALE62

RJ1/OE61

C127

0.1

u/2

5V

RE

SE

T

DS

P_P

RO

T_N

DS

P_IR

Q_N

DSP_P1_3

MC

U_P

44

MC

U_P

45

MC

U_P

46

DSP_MUTE

DSP_P1_2

SW

1S

W-T

AC

T

12

34

RESET

3V

3

C128

0.1

u/2

5V

R112

100/1

%

12

DSP_SLEEP

MCU_P72

P77

DSP_IC_N

MF

B

P0_0

(Audio AMP Enable)

(RESET_n)

P3_0

P1_5

(LINE_IN_DET)

3V

3

3V

3

3V

3

X3

X4P

-16M

HZ

4132

C129

0.1

u/2

5V

3V

3P

GD

PG

C

P20

C130

0.1

u/2

5V

P17

C131

10u/1

6V

R113

10K

/1%

12

RS

T_P

IC18

T1OSOT1OSI

BM23 BLUETOOTH



BM23 BLUETOOTH



P77

SOUND

EFFECT

PAIRING

P77

R3

P77

MC

U_

P7

1M

CU

_P

71

MFB

VOL-

PLAY/PAUSE

VOL+

C1

BU

TT

ON

MC

U_

P4

5

MC

U_

P7

0

MC

U_

P7

2

R1

R0

R2

MC

U_

P7

1

MC

U_

P7

2

MC

U_

P7

0

R1

141

0K

/1%

12

C6

11

u/1

6V

MC

U_

P7

0

<< PRV

C0

MC

U_

P7

2

MC

U_

P4

4

C1

32

1u

/16

V

R1

16

10

K/1

%1

2

SW

22

TS

08

M-P

F

21

SW

23

TS

08

M-P

F

21

SW

24

TS

08

M-P

F

21

SW

34

TS

08

M-P

F

21

SW

27

TS

08

M-P

F

21

SW

31

TS

08

M-P

F

21

SW

28

TS

08

M-P

F

21

SW

35

TS

08

M-P

F

21

SW

39

TS

08

M-P

F

21

SW

45

TS

08

M-P

F

21

SW

40

TS

08

M-P

F

21

SW

38

TS

08

M-P

F

21

SW PT

P77

C2

MC

U_

P7

0

R1

151

0K

/1%

12

MC

U_

P7

1

C6

31

u/1

6V

FWD >>

MC

U_

P7

2

MC

U_

P4

6

3V

33V

33V

3

Bo

ard

Na

me

Siz

eT

itle

Re

v

Da

te:

Sheet

of

P/N

MC

U_B

UT

TO

N4

.0

BM

23 E

VB

A

88

Mo

nd

ay

, Ju

ly 2

7,

20

15

0360

5F

, N

o.5

, In

dustr

y E

. R

d. V

II, H

sin

chu S

cie

nce P

ark

,

Hsin

ch

u C

ity

30

07

8,

Ta

iwa

nT

EL

.

88

6-3

-57

78

38

5

bm23 bluetooth evaluation board user s guide · bm23 bluetooth evalutation board user’s guide...

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