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PDF LMX9820A Data sheet ( Hoja de datos )
| Número de pieza | LMX9820A | |
| Descripción | Bluetooth Serial Port Module | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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www.DataSheet4U.com
APRIL 2005
Revision 1.0
LMX9820A
Bluetooth® Serial Port Module
1.0 General Description
The National Semiconductor LMX9820A Bluetooth Serial
Port module is a highly integrated radio, baseband control-
ler, and memory device implemented on an FR4 substrate.
All hardware and firmware is included to provide a com-
plete solution from antenna from the complete lower and
upper layers of the Bluetooth stack, up to the application
support layers including the Generic Access Profile (GAP),
the Service Discovery Application Profile (SDAP), and the
Serial Port Profile (SPP). The module includes a config-
urable service database to fulfill service requests for addi-
tional profiles on the host. The LMX9820A features a small
form factor (10.1 x 14.1 x 2.0 mm) design, which solves
many of the challenges associated with compact system
integration. Moreover, the LMX9820A is pre-qualified as a
Bluetooth Integrated Component. Conformance testing
through the Bluetooth qualification program enables a fast
time to market after system integration by ensuring a high
degree of compliance and interoperability.
Based on National’s CompactRISC™ 16-bit processor
architecture and Digital Smart Radio technology, the
LMX9820A is optimized to handle the data and link man-
agement processing requirements of a Bluetooth node.
The firmware supplied with this device offers a complete
Bluetooth (v1.1) stack including profiles and command
interface. This firmware features point-to-point and point-
to-multipoint link management supporting data rates up to
the theoretical maximum over RFComm of 704 kbps. The
internal memory supports up to three active Bluetooth data
links and one active SCO link.
1.1 APPLICATIONS
■ Personal Digital Assistants
■ POS Terminals
■ Data Logging Systems
■ Audio Gateway applications
2.0 Functional Block Diagram
LINK
MGMNT
PROCESSOR
(LMP)
FIRMWARE
(INCLUDES
PROFILES AND
COMMAND
INTERFACE)
UART
LNA
TR
SW
PA
DIGITAL
SMART
RADIO
SYNTHESIZER
BASEBAND
CONTROLLER
COMPACTRISC™
CORE
AUX
PORTS
FLASH
RAM
ADVANCED
AUDIO INTERFACE
JTAG
INTERFACE
SELECT
VOLTAGE
REGULATORS
ANALOG
DIGITAL
CRYSTAL/OSCILLATOR
AAI_STD
AAI_SFS
AAI_SRD
AAI_SCLK
VCC
DIG_GND[1:2]
UART_RX
UART_TX
UART_RTS#
UART_CTS#
IOVCC
TX_SWITCH_P
ENV0
ENV1
LSTAT_0
LSTAT_1
HOST_WU
RESET_B#
RESET_5100#
ISEL1
ISEL2
VDD_ANA_OUT
VDD_DIG_OUT
VDD_DIG_PWR_D#
CompactRISC is a trademark of National Semiconductor Corporation.
Bluetooth is a registered trademark of Bluetooth SIG, Inc. and is used under license by National Semiconductor.
© 2005 National Semiconductor Corporation
www.national.com
1 page  
5.0 Pad Descriptions
Pad Name
Clk-
Clk+
32kHz_CLKI
32kHz_CLKO
RF_inout
ISEL2
ISEL1
Pad
Location
B8
B9
B13
C13
H8
H13
J13
Table 2. System Interface Signals
Direction
Description
Input
Input
Input
Output
Input/Output
Input
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.
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.
32 kHz Clock input. Not supported by LMX9820A. Connect to ground.
Pad required for mechanical stability.
32 kHz Clock Output. Not supported by LMX9820A. Treat as no con-
nect. Pad required for mechanical stability.
RF Antenna Port. 50Ω nominal impedance. Typically connected to an
antenna through a 6.8 pF capacitor.
Module Interface Select Input Bit 1
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. Treat as no connect if not used. Pad required for mechanical stability.
2. Connect GND if not used.
Revision 1.0
5 www.national.com
5 Page 
6.0 Electrical Specifications (Continued)
4. The f0 = -64 dBm Bluetooth modulated signal, f1 = -39 dbm sine wave, f2 = -39 dBm Bluetooth modulated signal,
f0 = 2f1 - f2, and |f2 - f1| = n x 1 MHz, in which n is 3, 4, or 5. For the typical case, n = 3.
Table 15. Transmitter Performance Characteristics
Symbol
Parameter
Condition
Min Typ1 Max Unit
POUTRF 2
Transmit Output Power
2.402 GHz
2.441 GHz
-3 +1 +4 dBm
-3 +1 +4 dBm
2.480 GHz
-3 +1 +4 dBm
Power Density 5 Power Density
-4 1
2 dBm
MOD ∆F1AVG
Modulation Characteristics
Data = 00001111
140 165 175 kHz
MOD ∆F2MAX 3 Modulation Characteristics
Data = 10101010
115 125
kHz
∆F2AVG/∆F1AVG 4 Modulation Characteristics
0.8
20 dB Bandwidth
1000 kHz
ACP 5
Adjacent Channel Power
(In-band Spurious)
|M-N|=2
|M-N|>3
-48 -20 dBm
-51 -40 dBm
POUT2*fo 6
PA 2nd Harmonic
Suppression
Maximum gain setting:
f0 = 2402 MHz,
Pout = 4804 MHz
-30 dBm
POUT3*fo 5
ZRFOUT
PA 3rd Harmonic
Suppression
RF Output Impedance/Input
Impedance of RF Port
(RF_inout)
Maximum gain setting:
f0 = 2402 MHz,
Pout = 7206 MHz
Pout @ 2.5 GHz
-32 dBm
50 Ω
Return Loss 5
Return Loss
-14 dB
1. Typical operating conditions are at VCC = 3.3V, IOVCC = 3.3V operating voltage and 25°C ambient temperature.
2. The output power is measure at the device interface.
3. ∆F2max > 115 kHz for at least 99.9% of all ∆f2max.
4. Modulation index set between 0.28 and 0.35.
5. Not tested in production.
6. Out-of-Band spurs only exist at 2nd and 3rd harmonics of the CW frequency for each channel.
Symbol
fVCO
tLOCK
∆f0offset 1,2
∆f0drift 2,3
tD-Tx
Table 16. Synthesizer Performance Characteristics
Parameter
Condition
Min
VCO Frequency Range
Lock Time
f0 + 20 kHz
Initial Carrier Frequency Tolerance During preamble
-75
Initial Carrier Frequency Drift
Transmitter Delay Time
DH1 data packet
DH3 data packet
DH5 data packet
Drift Rate
From Tx data to antenna
-25
-40
-40
-20
Typ
5000
120
0
0
0
0
0
4
Max
75
25
40
40
20
Unit
MHz
µs
kHz
kHz
kHz
kHz
kHz/50µs
µs
Revision 1.0
11 www.national.com
11 Page | ||
| Páginas | Total 44 Páginas | |
| PDF Descargar | [ Datasheet LMX9820A.PDF ] | |
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