1.  Introduction
GOC-MD-502B , be of Bluetooth v2.0+EDR system, combines radio frequency, Bluetooth Baseband
controller and Bluetooth antenna together into a small close box to make cost down and save space as well .
GOC-MD-502B can be the same with instructions of HFP, HSP, OPP, SPP, A2DP and so on, and is
easy to apply the module into your own product design .
It uses CSR chip Bc5 Low-cost Stero Headset Solution .
In addition , GOC-MD-502B can help users customize soft well based on abundance in extra soft well
design.
深圳顾凯（文强）科技有限公司 GOC-MD-502B规格书
Goodocom Technologies Confidential  3
2.  Fieldsfor application
A、 、、 、Car view-sound system
B、 、、 、Bluetooth stereo earphone
C、 、、 、Bluetooth GPS equipment
D、 、、 、Car acoustics
E、 、、 、A/V USB DONGLE
F、 、、 、LCD TV
G、 、、 、Skype Phone
深圳顾凯（文强）科技有限公司 GOC-MD-502B规格书
Goodocom Technologies Confidential  4
3.  Main Specificationinstruction
Table 1: Main Specifications
Production  Bluetooth Heart Module
Type  GOC-MD-502B
Standard  Bluetooth2.0+EDR, Class II
Frequency Range  2.4~2.48GHz
Modulation Method  GFSK, 1Mbps, 0.5BT Gaussian
Max speed for transfer
Asynchronous: 723.2kbps/57.6kbps
Synchronous: 433.9kbps/433.9kbps
Hop  1600hops/sec, 1MHz channel space
Output impedance  50 ohms
Crystal Frequency  26MHz
Outer interface  UART,PIO,, Speaker, Microphone
Apply to Bluetooth
instructions
OPP,OBEX,SPP, A2DP, AVRCP,
Handset and Handsfree Profiles
Range for working
distance
10 meters (33 feet)
Receiving Sensitivity  -90dBm@0.1%BER
Emissive power  <6dBm
Connect Method  Point to Multi-Point
Audio Function
Audio Coding  16bits
SNC  >90dB
Accounting Audio
coding
128bits
Size  20mm X 13mm X 1mm
POWER Voltage  3.3V supply voltage
Working Current
Talk
50mA Typical at DH5
Standby Current  <0.4mA
Working condition
Temperature Range  -40ºC to +80ºC
Humidity Range  10%~90% Non-Condensing
Certificates  BQB,CE,FCC
深圳顾凯（文强）科技有限公司 GOC-MD-502B规格书
Goodocom Technologies Confidential  5
4.  Chart
Figure 1: GOC-MD-502B system chart
GOC-MD-502B integrate all the parts of Bluetooth：

  Be of Bluetooth 2.0+EDR Spec

  SUPPORT Piconet, up to 7 Slaves

  UART interface makes users control Bluetooth working condition by AT COMMAND

  Support HS/HF, A2DP , AVRCP Profiles

  Make and Receive Call

  Accept/Reject/End Call

  Call Waiting

  Last Number Redial

  Caller ID

  Call Progress Information

  Phonebook download

  ROHS compliant
深圳顾凯（文强）科技有限公司 GOC-MD-502B规格书
Goodocom Technologies Confidential  6
5.  Size and Pin definition
Figure 2: GOC-MD-502B size and pin
a)  SIZE
The size of GOC-MD-502B is :  13.0mm X 20.0mm X 1.0mm
b)  PIN definition
Table 2: PIN definition
PIN  Symbol  I/O  Description
1  GND  GND  Ground
2  RF-IO   RF input
3  GND  GND  Ground
4  SPK_L_N  Analogue  Speaker output ,negative
5  SPK_L_P  Analogue  Speaker output ,positive
深圳顾凯（文强）科技有限公司 GOC-MD-502B规格书
Goodocom Technologies Confidential  7
6  SPK_R_N  Analogue  Speaker output ,negative
7  SPK_R_P  Analogue  Speaker output ,positive
8  GND  GND  Ground
9  MIC_L_N  Analogue  Microphone input ,positive
10  MIC_L_P  Analogue  Microphone input ,negative
11  NC  /  /
12  NC  /  /
13  PIO5  I/O  Programmable input/output line
14  NC  /  /
15  NC  /  /
16  NC  /  /
17  NC  /  /
18  NC  /  /
19  NC  /  /
20  NC  /  /
21  GND  GND  Ground
22  3V3  POWEN SUPPLY  POWER Input with 3.3V
23  NC  /  /
24  NC  /  /
25  PD1   SWIM data interface
26  NC  /  /
27  TXD   UART data OUTPUT
28  RXD   UART data INPUT
29  NC  /  /
30  GND  GND  Ground
31  NC  /  /
32  RST  External reset input pin Active Low  33  PB4/SCL   I2C clock,true open drain I/O
34  PB5/SDA   I2C data, true open drain I/O
35  MOSI  CMOS Input  Serial Peripheral Interface DataInput
36  CSB  CMOS Input  Chip Select For Synchronous Serial
Interface (Active Low)
37  CLK  CMOS Output  Serial Peripheral Interface Clock
38  MISO  CMOS Output  Serial Peripheral Interface Data OUTPUT
39  PC7  I/O  Programmable input/output line
40  PIO4  I/O  Programmable input/output line
41  PC6  I/O  Programmable input/output line
42  PC5  I/O  Programmable input/output line
43  PC4  I/O  Programmable input/output line
44  PIO2  GND  Ground
45  PIO1  I/O  Programmable input/output line
46  PIO0  I/O  Programmable input/output line
47  GND  GND  Ground