LMX9820 National Semiconductor, LMX9820 Datasheet - Page 29

• Manufacturer Part Number: LMX9820
• Description: Bluetooth Serial Port Module
• Manufacturer: National Semiconductor

Revision 1.0
13.0 Usage Scenarios
13.1 SCENARIO 1: POINT-TO-POINT
CONNECTION
LMX9820 acts only as slave, no further configuration is
required.
Example: Sensor with LMX9820; hand-held device with
standard Bluetooth option.
Sensor Device
only “connected” event indicated to controller
Microcontroller
No Bluetooth™ commands necessary
Connected
on Port L
UART
Figure 18. Point-to-Point Connection
Service Response
Release SDP Link
SDP Link Request
Transparent Mode
Inquiry Response
SPP Link Request
SDP Link Accept
Release Confirm
SPP Link Accept
Inquiry Request
Service Browse
LMX9820
Raw Data
29
The SPP conformance of the LMX9820 allows any device
using the SPP to connect to the LMX9820.
Because of switching to Transparent automatically, the
controller has no need for an additional protocol layer; data
is sent raw to the other Bluetooth device.
On default, a PinCode is requested to block unallowed tar-
geting.
Air Interface
The client software only
shows high level functions
with Bluetooth
Standard Device
Get Remote Services
Search for Devices
Establish SPP Link
Link Established
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