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LMX9820ASM bảng dữ liệu(PDF) 34 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LMX9820ASM
Giải thích chi tiết về linh kiện  Bluetooth Serial Port Module
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nhà sản xuất  NSC [National Semiconductor (TI)]
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34
Revision 1.0
13.0 Usage Scenarios (Continued)
13.3 SCENARIO 3: POINT-TO-MULTIPOINT
CONNECTION
LMX9820A acts as master for several slaves.
Example: Two sensors with LMX9820A; one hand-held
master device with LMX9820A.
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. The
host controls which device is sending data, using the “Send
data” command. If the device receives data from the other
devices, it is packaged into an “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 21. Point-to-Multipoint Connection
Microcontroller
LMX9820A
Connect to Device #2
Connection Request
Transparent Mode
LMX9820A
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
LMX9820A
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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