NEO TELECOM BTM 68D Users Manual

Bluetooth Audio Module BTM-68D

BTM-68D

DATA SHEET

10 June 2012
Version 2.0

SHENZHEN TTK TECHNOLOGY CO.,LTD.

Copyright © TTK Technologies. all rights reserved.

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Bluetooth Audio Module BTM-68D

TABLE OF CONTENTS

1.0 Block Diagram......................................................................................................5

2.0 Electrical Characteristics......................................................................................6

3.0 Device Terminal Functions.................................................................................10

4.0 Example Application Schematic.........................................................................12

5.0 Package Dimensions...........................................................................................13

6.0 Layout Guidelines...............................................................................................14

7.0 Contact Information............................................................................................15

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Bluetooth Audio Module BTM-68D

DESCRIPTION: FEATURES:

BTM-68D is the latest generation of bluetooth ．Plug n' Play Bluetooth Solution for mono

Module. It provides highest level of integration and Stereo Audio Solutions

With integrated 2.4GHz radio, DSP, battery ．Integrated DSP, Stereo Codec , and Battery

Charger, stereo codec, and antenna ready. Charger

Mono and stereo audio applications. ．Integrated Antenna 2402-2480MHz
BTM-68D is also ready to support the latest ．Bluetooth 2.1+EDR Compliant
Bluetooth 2.1 standard and support for secure ．Class II Range up to 10 Meters
Simple pairing. ．Temperature range from -30C to +85C
．Low Power Consumption
．Supported Bluetooth Profiles: A2DP,

AVRCP, HFP, HSP

．Supported 5-band EQ
．High-quality Audio 95dB SNR on DAC

Playback

APPLICATIONS:

．High quality wireless stereo headsets
．Wireless mono headsets
．Wireless speakers
．Hands-free car kits

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Bluetooth Audio Module BTM-68D

REVISION HISTORY

Version Comment

Custom

Date

1.0 Preliminary Datasheet zuoguoqiang 07/2011

2.0 Update Antenna Datasheet zuoguoqiang 06/2012

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Bluetooth Audio Module BTM-68D

1.0 Block Diagram

Block Diagram deleted here. Can be found as confidential exhibit within this FCC Filing (FCC ID: WYHBTM-68D)

Figure 1: Block diagram of BTM-68D

。Bluetooth Version Bluetooth v2.1+EDR
。Operating Frequency 2.4GHz-2.48GHz ISM band
。Modulation GFSK(Gaussian Frequency Shift Keying)
。Transmit Power ≤4dBm, Class 2
。Sensitivity ≤-81dBm at 0.1% BER
。Transmission rate 1.8M/S—2.1M/S
。Security features Authentication and encryption
。Support profiles Hands-Free Profile v1.5 and Headset Profile v1.0

Advanced Audio Distribution Profile v1.2 and
Audio/Video Remote Control Profile V1.0

。Power 3.3V-4.2 LI-batter
。Operating Temperature –20 ~ +55 Centigrade
。Size 20mm x 25mm x 3mm

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Bluetooth Audio Module BTM-68D

2.0 Electrical Characteristics

Recommended operating conditions
Min Typ Max Unit

Operating temperature -20 20 70

℃

VDD_BAT 3.0 3.8 4.2 V
VDD_CHG 4.5 5 6.5 V
VDD_IO 1.7 1.8 1.95 V

Table 1:Recommended operating conditions

Battery charger
Charger Mode(BAT_P rising to 4.2V) Min Typ Max Unit

Supply current(a)
Battery trickle charge current(b)

Maximum battery fast charge
current (I-CTRL = 15)(c) (d)

Minimum battery fast charge
current (I-CTRL = 0)(c) (d)

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Headroom(e) > 0.7V

Headroom = 0.3V
Headroom > 0.7V
Headroom = 0.3V

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--

--

--

--

--

--

4.5 6 mA

4

140

120

40

35

--

--

--

--

--

mA

mA

mA

mA

mA

Bluetooth Audio Module BTM-68D

Trickle charge voltage threshold

Float voltage (with correct trim value set), VFLOAT (f)

Float voltage trim step size(f)
Battery charge termination current, % of fast
charge current

(a) Current into VDD_CHG does not include current delivered to battery (IVDD_CHG - IBAT_P)

(b) BAT_P < trickle charge voltage threshold

(c) Charge current can be set in 16 equally spaced steps

(d) Trickle charge threshold < BAT_P < Float voltage
(e) Where headroom = VDD_CHG - BAT_P
(f) Float voltage can be adjusted in 15 steps. Trim setting is determined in production test and must be loaded into the battery charger by
firmware during boot-up sequence

--

4.10 4.15 4.2 V

--

5

2.9

50

--

--

10 20

V

mV

%

Table 2: Battery charger characteristics

Reset

VTH,res threshold voltage
RIRES input resistance

Min Typ Max Unit

0.65 0.85 1.50 V

--

220

--

KΩ

CIRES input capacitance

--

Table 3: Reset terminal characteristics

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220

--

nF

Bluetooth Audio Module BTM-68D

The RESET pin is an active low reset and is internally filtered using the internal low frequency
clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESET being active. It
is recommended that RESET be applied for a period greater than 5ms.BTM-68D has an internal
reset circuitry ,when BTM-68D input 5V charging voltage, Module reset once.
The capacitor discharges through 220 k resistor, which eventually deactivates the reset.
Time constant of the RC circuitry is set in a way that the supply voltage is safely stabilized before
the reset deactivates.

Figure 2: BTM-68D reset circuitry

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Bluetooth Audio Module BTM-68D

MUTE

BTM-68D can output a high level to control the amplifier mute. When bluetooth normal
working, Module output high level to control the amplifier open. Standby, Module output low level
to control the amplifier off.

Figure 3: BTM-68D Mute contorl circuitry

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Bluetooth Audio Module BTM-68D

3.0 Device Terminal Functions

Lead name

1 PIO[0]
2 PIO[1]
3 PIO[2]
4 PIO[3]
5 PIO[9]
6 PIO[11]

Function

PIO port

PIO port

PIO port

PIO port

PIO port

PIO port

Description

Programmable input/output line
Programmable input/output line
Programmable input/output line
Programmable input/output line
Programmable input/output line
Programmable input/output line

7 PIO[12]
8 PIO[13]
9 PIO[14]

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PIO port

PIO port

PIO port

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Programmable input/output line
Programmable input/output line
Programmable input/output line

Bluetooth Audio Module BTM-68D

og

nput

ck

p

put

er

er

po

10 PIO[5]
11 1V8

12 GND

PIO port

1.8V POWER

GND Ground

13 GND GND
14 PIO[4]

PIO port

15 RST# Reset
16 MOSI SPI interface
17 CLK SPI interface
18 CSB SPI interface
19 MISO SPI interface
20 GND GND
21 LED[0]

Status

Programmable input/output line

Positive supply for 1.8V regulated output

ground

Programmable input/output line

L

ic low reset

SPI data i

SPI Clo

Chi

select for SPI

SPI data out

Ground

LED driv

22 LED[1] Status
23 VREG
24

BAT_IN Power Input

POWER ON/OFF

25 5V+ 5V-charger
26 MIC_BIAS
27 MIC+
28 AGND
29 L­30 L+

MIC power Microphone bias

MIC input Microphone input

AGND Analogue ground

L- Speaker output, channel L negative

L+ Speaker output, channel L positive

31 R- R­32 R+ R+

LED driv

Moudle

Lithium ion/polymer battery positive terminal.

Lithium ion/polymer battery charger input

wer on/off active high

Speaker output, channel R negative

Speaker output, channel R positive

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Bluetooth Audio Module BTM-68D

4.0 Example Application Schematic

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Schematic deleted here. Can be found as confidential exhibit within this FCC Filing (FCC ID: WYHBTM-68D)

Bluetooth Audio Module BTM-68D

5.0 Package Dimensions

Unit: mm

13.15

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Bluetooth Audio Module BTM-68D

6.0 Layout Guidelines

6.0.1 Audio Layout
Route audio lines as differential pairs. The positive and negative signals

should run parallel and close to each other until they are converted to single-ended

signals. Use dedicated audio ground plane for entire audio section.

6.0.2 Antenna Design
Do not place GND plane or any metal directly under the antenna of

BTM-68D. To avoid any excess parasitic capacitance in the antenna feed line caused

by the RF test pin on the bottom side of the module, the area underneath the RF test

pin should also be left free from copper. Any metal in close proximity of the antenna

will have an effect on the antenna performance. Thus any metal should be placed as

far from the antenna as possible. The module should be placed to an edge of the PCB.

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Bluetooth Audio Module BTM-68D

7.0 Contact Information

Sales : [e-mail]

Technical Support: [e-mail]

Address: 8th Floor,Southland Building,minzhi hongshan ,
Mei long Road, long hua Town, Bao'an District,shenzhen

Website: WWW.szttk.com

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