LMX9820ASM datasheet(32/44 Pages) NSC

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13.0 Usage Scenarios (Continued)

13.0 Usage Scenarios

13.1 SCENARIO 1: POINT-TO-POINT

CONNECTION

LMX9820A acts only as slave, no further configuration is

required.

Example: Sensor with LMX9820A; hand-held device with

standard Bluetooth option.

The SPP conformance of the LMX9820A allows any device

using the SPP to connect to the LMX9820A.

By switching to transparent mode automatically, the con-

troller 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.

Figure 19. Point-to-Point Connection

Microcontroller

LMX9820A

Standard Device

Air Interface

UART

Search for Devices

Inquiry Request

Inquiry Response

Get Remote Services

Transparent Mode

No Bluetooth commands necessary,

Sensor Device

only “connected” event indicated to controller.

SDP Link Request

SDP Link Accept

Connected

Service Browse

Service Response

Release SDP Link

Release Confirm

SPP Link Request

SPP Link Accept

Establish SPP Link

Link Established

on Port L

The client software only

shows high level functions.

with Bluetooth

Raw Data

LMX9820ASM Datasheet(PDF) 32 Page - National Semiconductor (TI)

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