參數(shù)資料
型號(hào)： LMX9830
廠商： National Semiconductor Corporation
英文描述： BluetoothTM Serial Port Module
中文描述： 藍(lán)牙串口模塊
文件頁(yè)數(shù)： 14/46頁(yè)
文件大?。?/td> 664K
代理商： LMX9830
www.national.com
14
L
8.0 Functional Description
(Continued)
8.1.8 Access.bus interface
In case the firmware is configured by the option pins to use
an access.bus or i
2
c compatible EEPROM, the LMX9830
will activate that interface and try to read out data from the
EEPROM. The external memory needs to be compatible to
the reference listed in Table 11 on page 14.
The largest size EEPROM supported is limited by the
addressing format of the selected NVM. The device must
have a page size equal to N x 32 bytes.
The device uses a 16 bit address format. The device
address must be “000”.
8.2 TRANSPORT PORT - UART
The LMX9830 provides one Universal Asynchronous
Receiver Transmitter (UART). The UART interface consists
out of Receive (RX), Transmit (TX), Ready-to-Send (RTS)
and Clear-to-Send signals. RTS and CTS are used for
hardware handshaking between the host and the
LMX9830. Since the LMX9830 acts as gateway between
the bluetooth and the UART interface, National Semicon-
ductor recommends to use the handshaking signals espe-
cially for transparent operation. In case two signals are
used CTS needs to be pulled to GND. Please refer also to
“LMX9830 Software User’s Guide” for detailed information
on 2-wire operation.
The UART interface supports formats of 8-bit data with or
without parity, with one or two stop bits. It can operate at
standard baud rates from 2400bits/s up to a maximum
baud rate of 921.6kbits/s. DMA transfers are supported to
allow for fast processor independent receive and transmit
operation.
The UART baudrate is configured during startup by check-
ing option pins OP3, OP4 and OP5 for reference clock and
baudrate. In case Auto baud rate detect is chosen, the
firmware check the NVS area if a valid UART baudrate has
been stored in a previous session. In case, no useful value
can be found the device will switch to auto baud rate detec-
tion and wait for an incoming reference signal.
The UART offers wakeup from the power save modes via
the multi-input wakeup module. When the LMX9830 is in
low power mode, RTS# and CTS# can function as
Host_WakeUp and Bluetooth_WakeUp respectively. Table
12 on page 14 represents the operational modes sup-
ported by the firmware for implementing the transport via
the UART.
8.3 AUDIO PORT
8.3.1 Advanced Audio Interface
The Advanced Audio Interface (AAI) is an advanced ver-
sion of the Synchronous Serial Interface (SSI) that pro-
vides a full-duplex communications port to a variety of
industry-standard 13/14/15/16-bit linear or 8-bit log PCM
codecs, DSPs, and other serial audio devices.
The interface allows the support one codec or interface.
The firmware selects the desired audio path and interface
configuration by a parameter that is located in RAM
(imported from non-volatile storage or programmed during
boot-up). The audio path options include the Motorola
MC145483 codec, the OKI MSM7717 codec, the Winbond
W681360/W681310 codecs and the PCM slave through
the AAI.
In case an external codec or DSP is used the LMX9830
audio interface generates the necessary bit and frame
clock driving the interface.
Table 13 on page 15 summarizes the audio path selection
and the configuration of the audio interface at the specific
modes.
The LMX9830 supports one SCO link.
Table 11. 24C64 EEPROM 8kx8
Parameter
Value
Supplier
Atmel
Supply Voltage
1
1.
Parameter range reduced to requirements of National
reference design
2.7 - 5.5 V
Interface
2 wire serial interface
Memory Size
8K x 8, 64kbit
Clock Rate
1
100 KHz
Access
32 Byte Page Write Mode
Table 12. UART Operation Modes
Item
Range
Default at Power-Up
With Auto-Detect
Baud Rate
2.4 to 921.6 kbits/s
Either configured by option pins, NVS
parameter or auto baud rate detection
2.4 to 921.6 kbits/s
Flow Control
RTS#/CTS# or None
RTS#/CTS#
RTS#/CTS#
Parity
Odd, Even, None
None
None
Stop Bits
1,2
1
1
Data Bits
8
8
8
相關(guān)PDF資料
PDF描述
LMX9830SM BluetoothTM Serial Port Module
LMX9830SMX BluetoothTM Serial Port Module
LMX9838 Bluetooth Serial Port Module
LMX9838SB Bluetooth Serial Port Module
LMX9838SBX Bluetooth Serial Port Module
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX9830DONGLE 功能描述:藍(lán)牙/802.15.1 開發(fā)工具 LMX9830 BLUETOOTH EVAL KIT RoHS:否 制造商:Panasonic Electronic Components 產(chǎn)品:Bluetooth Evaluation Kit 工具用于評(píng)估:PAN1721 頻率:2.4 GHz 接口類型:I2C 工作電源電壓:2 V to 3.6 V
LMX9830DONGLE/NOPB 制造商:Texas Instruments 功能描述:Evaluation Kit For Bluetooth Serial Port Module
LMX9830SM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:BluetoothTM Serial Port Module
LMX9830SM/NOPB 功能描述:射頻收發(fā)器 RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
LMX9830SMX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:BluetoothTM Serial Port Module
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