- 您現在的位置：買賣IC網 > PDF目錄361044 > LMX9820ASMX (NATIONAL SEMICONDUCTOR CORP) Bluetooth Serial Port Module PDF資料下載
參數資料
| 型號： | LMX9820ASMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 通信及網絡 |
| 英文描述： | Bluetooth Serial Port Module |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PBGA116 |
| 封裝： | 10.10 X 14.10 MM, 2 MM HEIGHT, LGA-116 |
| 文件頁數： | 27/44頁 |
| 文件大小： | 579K |
| 代理商： | LMX9820ASMX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
Revision 1.0
27
www.national.com
L
12.0 Command Interface
(Continued)
12.0 Command Interface
The LMX9820A offers Bluetooth functionality through
either a self-contained slave functionality or a simple com-
mand interface. The interface is carried over the UART
interface.
The following sections describe the protocol on the UART
interface between the LMX9820A and the host in com-
mand mode (see Figure 18). In Transparent mode, no data
framing is necessary and the device does not interpret data
carried over the interface as commands.
12.1 FRAMING
The connection is considered “Error free”. But for packet
recognition and synchronization, some framing is used.
All packets sent in both directions are constructed following
the model shown in Table 28.
12.1.1 Start and End Delimiters
The “STX” character is used as the start delimiter: STX =
0x02. ETX = 0x03 is used as the end delimiter.
12.1.2 Packet Type ID
This byte identifies the type of packet. See Table 29 for
details.
12.1.3 Opcode
The opcode identifies the command to execute. The
opcode values can be found within the “LMX9820A Soft-
ware User’s Guide”
included with the LMX9820A Evalua-
tion Board.
12.1.4 Data Length
Number of bytes in the Packet Data field. The maximum
size is 333 data bytes per packet.
12.1.5 Checksum
This is a simple Block Check Character (BCC) checksum
of the bytes “Packet type”, “Opcode”, and “Data Length”.
The BCC checksum is calculated as low byte of the sum of
all bytes (e.g., if the sum of all bytes is 0x3724, the check-
sum is 0x24).
.
Figure 18. Bluetooth Functionality
LMX9820A
UART
Existing device
without Bluetooth
capabilities
UART
Table 28. Packet Framing
Start
Delimiter
Packet
Type ID
Opcode
Data Length
Checksum
Packet Data
End
Delimiter
1 Byte
1 Byte
1 Byte
2 Bytes
1 Byte
<Data Length> Bytes
1 Byte
- - - - - - - - - - - - - Checksum - - - - - - - - - - - - -
Table 29. Packet Type Identification
ID
Direction
Description
0x52
‘R’
REQUEST
(REQ)
A request sent to the Bluetooth module.
All requests are answered by exactly one confirm.
0x43
‘C’
Confirm
(CFM)
The Bluetooth modules confirm to a request.
All requests are answered by exactly one confirm.
0x69
‘i’
Indication
(IND)
Information sent from the Bluetooth module that is not a direct confirm to a request.
Indicating status changes, incoming links, or unrequested events.
0x72
‘r’
Response
(RES)
An optional response to an indication.
This is used to respond to some type of indication message.
相關PDF資料 |
PDF描述 |
|---|---|
| LMX9820A | Bluetooth Serial Port Module |
| LMX9820ASM | Bluetooth Serial Port Module |
| LMX9820 | Bluetooth Serial Port Module |
| LMX9820SB | Bluetooth Serial Port Module |
| LMX9820SBX | Bluetooth Serial Port Module |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX9820ASMX/NOPB | 制造商:Texas Instruments 功能描述:Bluetooth Class II 3.3V 0.704Mbps 116-Pin LTCC T/R 制造商:Texas Instruments 功能描述:MODULE BLUETOOTH SERIAL PORT SMD |
| LMX9820SB | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:MODULE BLUE TOOTH 116-LTCC 制造商:Texas Instruments 功能描述:BLUETOOTH MODULE 2.4GHZ 704KBPS |
| LMX9820SBX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Bluetooth Serial Port Module |
| LMX9830 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:BluetoothTM Serial Port Module |
| LMX9830DONGLE | 功能描述:藍牙/802.15.1 開發工具 LMX9830 BLUETOOTH EVAL KIT RoHS:否 制造商:Panasonic Electronic Components 產品:Bluetooth Evaluation Kit 工具用于評估:PAN1721 頻率:2.4 GHz 接口類型:I2C 工作電源電壓:2 V to 3.6 V |
發布緊急采購，3分鐘左右您將得到回復。