參數(shù)資料
型號(hào)： LMX9820
廠商： National Semiconductor Corporation
英文描述： Bluetooth Serial Port Module
中文描述： 藍(lán)牙串行端口模塊
文件頁(yè)數(shù)： 31/40頁(yè)
文件大?。?/td> 567K
代理商： LMX9820
Revision 1.0
31
www.national.com
L
13.3 SCENARIO 3: POINT-TO-MULTIPOINT CON-
NECTION
LMX9820 acts as master for several slaves.
Example:
Two sensors with LMX9820; one hand-held
device with implemented LMX9820.
Serial Devices #2 and #3 establish the link automatically as
soon as they are contacted by another device. No control-
ler interaction is necessary for setting up the Bluetooth link.
Both switch automatically into Transparent mode. The host
sends raw data over the UART.
Serial Device #1 is acting as master for both devices. As
the host has to decide to or from which device data is com-
ing from, data must be sent using the “Send data com-
mand”. If the device receives data from the other devices, it
is packaged into an event called “Incoming data event”.
The event includes the device related port number.
If necessary, a link configuration can be stored as default in
the master Serial Device #1 to enable the automatic recon-
nect after reset, power-up, or by sending the “connect
default connection” command.
Figure 20. Point-to-Multipoint Connection
Microcontroller
LMX9820
Connect to Device #2
Connection Request
Transparent Mode
LMX9820
Serial Device #1
Connect to Device #2
Microcontroller
Serial Device #2
see Scenario 2
see Scenario 2
Automatic Link Setup
Connected
on Port L
Send Data Command
Receive Data Event
Send Data to Port L1
Data Received
from Port L1
Link Established
Link Established
on Port L1
Microcontroller
LMX9820
Connection Request
Transparent Mode
Serial Device #3
Automatic Link Setup
Connected
on Port L
Connect to Device #3
Connect to Device #3
see Scenario 2
see Scenario 2
Send Data Command
Receive Data Event
Send Data to Port L2
Data Received
from Port L2
Link Established
Link Established
on Port L2
Air
Interface
Raw Data
Raw Data
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX9820A 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Bluetooth Serial Port Module
LMX9820ADEV 制造商:Texas Instruments 功能描述:KIT DEV FOR LMX9820
LMX9820ADONGLE/NOPB 制造商:Texas Instruments 功能描述:KIT REF DESIGN FOR LMX9820
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
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