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PDF ( 数据手册 , 数据表 ) LMX9838

零件编号 LMX9838
描述 Bluetooth Serial Port Module
制造商 National Semiconductor
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LMX9838 数据手册, 描述, 功能
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PRELIMINARY
July 2007
LMX9838
Bluetooth® Serial Port Module
1.0 General Description
The National Semiconductor LMX9838 Bluetooth Serial Port
module is a fully integrated Bluetooth 2.0 baseband controller,
2.4 GHz radio, crystal, antenna, LDO and discreets; com-
bined to form a complete small form factor (10 mm x 17 mm
x 2.0 mm) Bluetooth node.
All hardware and firmware is included to provide a complete
solution from antenna through the complete lower and upper
layers of the Bluetooth stack, up to the application including
the Generic Access Profile (GAP), the Service Discovery Ap-
plication Profile (SDAP), and the Serial Port Profile (SPP).
The module includes a configurable service database to fulfil
service requests for additional profiles on the host. Moreover,
the LMX9838 is qualified as a Bluetooth endproduct, ready to
be used in the end application without additional testing and
license cost.
Based on National’s CompactRISC® 16-bit processor archi-
tecture and Digital Smart Radio technology, the LMX9838 is
optimized to handle the data and link management process-
ing requirements of a Bluetooth node.
The firmware supplied in the on-chip ROM memory offers a
complete Bluetooth (v2.0) stack including profiles and com-
mand 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 7 active Bluetooth data links
and one active SCO link.
The on-chip Patch RAM provided for lowest cost and risk, al-
lows the flexibility of firmware upgrade.
The module is lead free and RoHS (Restriction of Hazardous
Substances) compliant. For more information on those quality
standards, please visit our green compliance website at
http://www.national.com/quality/green/
2.0 Features
Complete Bluetooth 2.0 Stack including
Baseband and Link Manager
Protocols: L2CAP, RFCOMM, SDP
Profiles: GAP, SDAP, SPP
High Integration: Includes Antenna, crystal, EEPROM,
LDO
Supporting up to 7 active Bluetooth data links and 1 active
SCO link
Class 2 operation
UART Command/Data port speed up to 921.6kbits/s
Advanced Audio Interface for external PCM codec
Better than -80dBm input sensitivity
FCC certified: FCC ID: ED9LMX9838
IC certified: IC-1520A-LMX9838
CE Self certified
Bluetooth SIG QD ID: B012394
Compact Size: 10mm x 17mm x 2.0mm
3.0 Functional Block Diagram
Bluetooth® is a registered trademark of Bluetooth SIG, Inc. and is used under license by National Semiconductor Corporation.
CompactRISC® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 300279
30027913
www.national.com







LMX9838 pdf, 数据表
Transmitter Performance Characteristics
Symbol
Parameter
Condition
POUTRF
Transmit Output Power
MOD ΔF1AVG
MOD ΔF2MAX (Note 16)
ΔF2AVG/DF1AVG (Note
17)
20 dB Bandwidth
POUT2*fo (Note 18)
Modulation Characteristics
Modulation Characteristics
Modulation Characteristics
PA 2 nd Harmonic Suppression
ZRFOUT (Note 19)
RF Output Impedance/Input
Impedance of RF Port (RF_inout)
2.402 GHz
2.441 GHz
2.480 GHz
Data = 00001111
Data = 10101010
Maximum gain setting:
f0 = 2402 MHz,
Pout = 4804 MHz
Pout @ 2.5 GHz
Min
−4
−4
−4
140
115
0.8
Typ
(Note 13)
0
0
0
165
125
Max
+3
+3
+3
175
1000
-30
47
Unit
dBm
dBm
dBm
kHz
kHz
kHz
dBm
Ω
Note 15: Typical operating conditions are at 2.75V operating voltage and 25°C ambient temperature.
Note 16: ΔF2max 115 kHz for at least 99.9% of all Δf2max.
Note 17: Modulation index set between 0.28 and 0.35.
Note 18: Out-of-Band spurs only exist at 2nd and 3rd harmonics of the CW frequency for each channel.
Note 19: Not tested in production.
Synthesizer Performance Characteristics
Symbol
Parameter
Condition
Min Typ Max Unit
fVCO
tLOCK
Δf0offset (Note 20)
Δf0drift (Note 20)
VCO Frequency Range
Lock Time
Initial Carrier Frequency Tolerance
Initial Carrier Frequency Drift
f0 ± 20 kHz
During preamble
DH1 data packet
DH3 data packet
2402
-75
-25
-40
2480
120
0 75
0 25
0 40
MHz
µs
kHz
kHz
kHz
DH5 data packet
-40
0
40 kHz
Drift Rate
-20 0 20 kHz/50µs
tD - Tx
Transmitter Delay Time
From Tx data to antenna
4
µs
Note 20: Frequency accuracy is dependent on crystal oscillator chosen. The crystal must have a cumulative accuracy of < +/-20ppm to meet Bluetooth
specifications.
Note: All RF parameters are tested prior to the antenna.
11.0 Functional Description
11.1 BASEBAND AND LINK MANAGEMENT
PROCESSORS
Baseband and Lower Link control functions are implemented
using a combination of National Semiconductor’s Com-
pactRISC 16-bit processor and the Bluetooth Lower Link
Controller. These processors operate from integrated ROM
memory and RAM and execute on-board firmware imple-
menting all Bluetooth functions.
11.1.1 Bluetooth Lower Link Controller
The integrated Bluetooth Lower Link Controller (LLC) com-
plies with the Bluetooth Specification version 2.0 and imple-
ments the following functions:
• Adaptive Frequency Hopping
• Interlaced Scanning
• Fast Connect
• Support for 1, 3, and 5 slot packet types
• 79 Channel hop frequency generation circuitry
• Fast frequency hopping at 1600 hops per second
• Power management control
• Access code correlation and slot timing recovery
11.1.2 Bluetooth Upper Layer Stack
The integrated upper layer stack is prequalified and includes
the following protocol layers:
• L2CAP
• RFComm
• SDP
11.1.3 Profile Support
The on-chip application of the LMX9838 allows full stand-
alone operation, without any Bluetooth protocol layer neces-
sary outside the module. It supports the Generic Access
Profile (GAP), the Service Discovery Application Profile
(SDAP), and the Serial Port Profile (SPP).
www.national.com
8







LMX9838 equivalent, schematic
TABLE 17. Packet Type Identification
0x52
'R'
0x43
'C'
0x69
'i'
0x72
'r'
ID
Direction
REQUEST
(REQ)
Confirm
(CFM)
Indication
(IND)
Response
(RES)
Description
A request sent to the Bluetooth module.
All requests are answered by exactly one confirm.
The Bluetooth modules confirm to a request.
All requests are answered by exactly one confirm.
Information sent from the Bluetooth module that is not a direct confirm to a request.
Indicating status changes, incoming links, or unrequested events.
An optional response to an indication.
This is used to respond to some type of indication message.
15.2 COMMAND SET OVERVIEW
The LMX9838 has a well defined command set to:
• Configure the device:
Hardware settings
Local Bluetooth parameters
Service database
• Set up and handle links
Table 18 through Table 28 show the actual command set and
the events coming back from the device. A full documented
description of the commands can be found in the “LMX9838
Software User’s Guide”.
Note: For standard Bluetooth operation only commands from Table 18
through Table 20 will be used. Most of the remaining commands are
for configuration purposes only.
TABLE 18. Device Discovery
Inquiry
Command
Remote Device Name
Event
Inquiry Complete
Device Found
Remote Device Name Confirm
Description
Search for devices
Lists BDADDR and class of device
Get name of remote device
Command
SDAP Connect
SDAP Disconnect
SDAP Service Browse
SDAP Service Search
SDAP Attribute Request
TABLE 19. SDAP Client Commands
Event
SDAP Connect Confirm
SDAP Disconnect Confirm
Connection Lost
Service Browse Confirm
SDAP Service Search Confirm
SDAP Attribute Request Confirm
Description
Create an SDP connection to remote device
Disconnect an active SDAP link
Notification for lost SDAP link
Get the services of the remote device
Search a specific service on a remote device
Searches for services with specific attributes
Command
Establish SPP Link
Set Link Timeout
Get Link Timeout
Release SPP Link
SPP Send Data
Transparent Mode
TABLE 20. SPP Link Establishment
Event
Establishing SPP Link Confirm
Link Established
Incoming Link
Set Link Timeout Confirm
Get Link Timeout Confirm
Release SPP Link Confirm
SPP Send Data Confirm
Incoming Data
Transparent Mode Confirm
Description
Initiates link establishment to a remote device
Link successfully established
A remote device established a link to the local device
Confirms the Supervision Timeout for the existing Link
Get the Supervision Timeout for the existing Link
Initiate release of SPP link
Send data to specific SPP port
Incoming data from remote device
Switch to Transparent mode on the UART
TABLE 21. Storing Default Connections
Command
Connect Default Connection
Store Default Connection
Get list of Default Connections
Delete Default Connections
Event
Connect Default Connection Confirm
Store Default Connection Confirm
List of Default Devices
Delete Default Connections Confirm
Description
Connects to either one or all stored default connections
Store device as default connection
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