LM Technologies LM740 User Manual

LM556 Development Board

1. Overview

®
The LM740 is CSR BlueCore 5
PBAP and HID applications. It also allows to implement advanced functions such as noise cancellation and
multi-media streaming. The LM740 module board is de signed for using with the LM556 Bluetooth module
Evaluation Kit. This user's guide will introduce the settings of LM556 with LM740 module board to implement
wireless stereo headset application.

2. The Settings

LM740 Stereo Loud speakers
Device name：LM740 RX-HIC
Profiles：A2DP-Sink, AVRCP, HFP/HSP
Pin code：0000
Image file: LM740-RX-HIC.zip
Description: These settings enable the LM556 with LM740 module board to receive A2DP streaming from
music audio source as well as answering phone call with HFP/HSP. That is, to implement the wireless stereo
headset application.
When receiving or making a call, the music playback will be automatically paused. The music playback can be
resumes when the call is ended.
Each time the LM740 - RX - HIC is switched on, it will intend to connect to the Bluetooth device that the last it had
connected with.
The LM740 -RX-HIC has battery low detection and protection. When battery low occurred, it will worn by
flashing red LED. If the battery is exhausted, the firmware will switch off the system to protect the Li-ion battery.
®
MM based Bluetooth module and is suitable for A2DP, SPP, DUN, OPP, FTP,
A2DP Streaming
Stereo headset mode
User's Guide
LM740
Running
A2DP, AVRCP
profiles
Rev 1.0