GUBTCR42M laptop Bluetooth module


The GUBTCR42M is designed to provide Bluetooth function on a small form factor. The Bluetooth function is based on CSR BC04-ROM chipset Bluetooth System, which implements the full speed class 2 Bluetooth operations with full 7 slave piconet support. The interface of GUBTCR42M to host system is USB and full compliant with USB ver.2.0.

General information

  • Datasheet : here
  • Main chip : CSR BC04
  • Bluetooth Specification : V1.1, V1.2, V2.0+EDR compliant
  • USB Specification : V2.0 full-speed compliant interface
  • RF module Tx power : 2 dBm typical (maximum 4 dBm for Class 2)
  • RF module sensitivity : -79dbm +/- 1 dBm at 0.1% Bit Error Rate (BER)
  • Bluetooth 2.4GHz~2.4835GHz license-free ISM Band frequency hopping
  • Antenna impedance : 50 Ohm
  • Single onboard Antenna connector support
  • Bluetooth wireless access up to a radius of 32.8 feet (10 Meters)

Supported profiles

  • A2DP (Adv. Audio Dist. Profile)
  • BIP (Basic Imaging Profile)
  • DUN (Dial Up Networking Profile)
  • FAX (Fax Profile)
  • FTP (File Transfer Profile)
  • GOEP (Generic Object Exchange Profile
  • HCRP (Hard Copy Replacement Profile)
  • HID (Human Interface Device Profile)
  • HSP (Headset Profile)
  • OPP (Object Push Profile)
  • PAN (Personal Area Network Profile)
  • SDAP (Service Discovery Application Profile)
  • SPP (Serial Port Profile)
  • SYNCH (Synchronization Profile)

Power consumption (varies depending on environment)

Supply voltage : 3.3v Current
Idle Mode 40mA
TX Continous 63mA
RX 40mA


1 3V ~ +5V Positive supply for whole module
2 GND Ground Pin
3 USB_D- USB Data Minus
4 USB_D+ USB Data Plus
5 LED BT Activity LED indicator
6 Reserved
BT Active indicator output to inform WLAN NIC. Host side should keep it NC if not supported.
7 Reserved
WLAN Active indicator output to from WLAN NIC. Host side should keep it NC if not supported.
8 BT_ON# Active LOW to enable Bluetooth function. High to disable function

Pinout on the module wiring