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參數資料
| 型號： | LMX9820A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Bluetooth Serial Port Module |
| 中文描述： | 藍牙串行端口模塊 |
| 文件頁數： | 33/44頁 |
| 文件大小： | 579K |
| 代理商： | LMX9820A |
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Revision 1.0
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L
13.0 Usage Scenarios
(Continued)
13.2 SCENARIO 2: AUTOMATIC POINT-TO-POINT
CONNECTION
LMX9820A at both sides.
Example:
Serial Cable Replacement.
Device #1 controls the link setup with a few commands as
described.
If step 5 is executed, the stored default device is connected
(step 4) after reset (in automatic mode only) or by sending
the “Connect to Default Device” command. The command
can be sent to the device at any time.
If step 6 is left out, the microcontroller has to use the “Send
Data” command, instead of sending data directly to the
module.
Figure 20. Automatic Point-to-Point Connection
Microcontroller
LMX9820A
Air
Inquiry
Inquiry Request
Inquiry Response
Inquiry Result
Establish SDP Link
Transparent Mode
SDP Link Request
SDP Link Accept
SDP Link Established
Connected
on Port R
Service Browse
Browse Result
Release SDP Link
SDP Link Released
Service Browse
Service Response
Release SDP Link
Release Confirm
SPP Link Request
SPP Link Accept
Establish SPP Link
Link Established
LMX9820A
Transparent Mode
Serial Device #1
Inquiry
1. Devices in Range
Inquiry Result
2. Choose the Device
3. Which COM Port is
available
Establish SDP Link
SDP Link Established
Service Browse
RFComm Port = R
Release SDP Link
SDP Link Released
4. Create SPP Link
Establish SPP Link
Connected on Port L
to Port R1 on Port L2
Transparent Mode
6. Switch to
to Port R on Port L
Microcontroller
Serial Device #2
5. Connect on Default
Store Default Device
(Optional)
Device Stored
Storing Default Device
Device Stored
1. Port R indicates the remote RFComm channel to connect to. Usually the result of the SDP request.
2. Port L indicates the Local RFComm channel used for that connection.
No Bluetooth commands necessary;
only “connected” event indicated to controller.
Bluetooth device controls link with
a few commands.
Interface
Transparent
Raw Data
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相關代理商/技術參數 |
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|---|---|
| LMX9820ADEV | 制造商:Texas Instruments 功能描述:KIT DEV FOR LMX9820 |
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| LMX9820ASM | 制造商:Texas Instruments 功能描述:BLUETOOTH MODULE, SMD, 9820, FR4129 |
| LMX9820ASM/NOPB | 制造商:Texas Instruments 功能描述:IC MODULE BLUETOOTH 116-LTCC |
| LMX9820ASMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Bluetooth Serial Port Module |
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