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參數(shù)資料
| 型號(hào)： | LMX9820A |
| 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)： | 5/44頁(yè) |
| 文件大小： | 579K |
| 代理商： | LMX9820A |
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Revision 1.0
5
www.national.com
L
5.0 Pad Descriptions
Table 2. System Interface Signals
Pad Name
Pad
Location
Direction
Description
Clk-
B8
Input
Xtal g or Negative Clock Input.
Typically connected along with
XTAL_D to an external surface-mount AT-cut crystal. Leave not con-
nected in case Clk+ is connected to external crystal oscillator.
Clk+
B9
Input
Xtal d or Positive Clock Input.
Typically connected along with
XTAL_G to an external surface-mount AT-cut crystal. Can also be con-
figured as a frequency input when using an external crystal oscillator.
When configured as a frequency input, typically connected to an exter-
nal Temperature Compensated Crystal Oscillator (TCXO) through an
Alternating Current (AC) coupling capacitor.
32kHz_CLKI
B13
Input
32 kHz Clock input.
Not supported by LMX9820A. Connect to ground.
Pad required for mechanical stability.
32kHz_CLKO
C13
Output
32 kHz Clock Output.
Not supported by LMX9820A. Treat as no con-
nect. Pad required for mechanical stability.
RF_inout
H8
Input/Output
RF Antenna Port.
50
nominal impedance. Typically connected to an
antenna through a 6.8 pF capacitor.
ISEL2
H13
Input
Module Interface Select Input Bit 1
ISEL1
J13
Input
Module Interface Select Input Bit 0
Table 3. USB Interface Signals (not supported by LMX9820A firmware)
Pad Name
Pad
Location
Direction
Description
USB_VCC
F12
Input
USB Transceiver Power Supply +
1
USB_D+
E11
Input/Output
USB Data Positive
1
USB_D-
E12
Input/Output
USB Data Negative
1
USB_Gnd
G12
Input
USB Transceiver Ground
. Connect to GND.
1.
Treat as no connect. Pad required for mechanical stability.
Table 4. UART Interface Signals
Pad Name
Pad
Location
Direction
Description
Uart_tx
D9
Output
UART Host Control Interface Transport, Transmit Data
Uart_rx
C9
Input
UART Host Control Interface Transport, Receive Data
Uart_rts#
C10
Output
UART Host Control Interface Transport, Request to Send
1
Uart_cts#
D10
Input
UART Host Control Interface Transport, Clear to Send
2
1.
2.
Treat as no connect if not used. Pad required for mechanical stability.
Connect GND if not used.
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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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