NSC LMX9838SBX, LMX9838 Datasheet

© 2006 National Semiconductor Corporation www.national.com

LMX9838 Bluetooth

TM

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; combined to form a complete small form factor (10
mm x 17 mm x 1.85 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 Application Profile (SDAP), and the Serial
Port Profile (SPP). The module i nclud es a conf igurabl e ser­vice database to fulfil service requests for additional pro­files on the host. Moreover, the LMX9838 is pre-qualified
as a Bluetooth subsystem. Conformance testing through
the Bluetooth qualification program enables a short time to
market after system integration by insuring a high probabil­ity of compliance and interopera bil ity.

Based on National’s CompactRISC

™

16-bit processor
architecture and Digital Smart Radio technology, the
LMX9838 is optimized to handle the data and link manage­ment processing requirements of a Bluetooth node.

The firmware supplied in the on-ch ip ROM me mory offers a
complete Bluetooth (v2.0) s tac k inclu ding pro files an d 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 su pport s up to 7 ac tive Blue tooth dat a
links and one active SCO link.

The on-chip Patch RAM provided for lowest cost and risk,
allows the flexibility of firmware upgrade.

The LMX9838 module is lead free and RoHS (Restriction
of Hazardous Subst ances) com plia nt. For more informa tion
on those quality standards, please visit our green compli­ance website at http://www.national.com/quality/green/

1.1 APPLICATIONS

 Telemedicine/Medical, Industrial and Scientific.
 Personal Digital Assistants
 POS Terminals
 Data Logging Systems
 Audio Gateway applications

October , 2006

Product Brief

LMX9838 Bluetooth™ Serial Port Module

CompactRISC is a trademark of National Semiconductor Corporation.
Bluetooth is a trademark of Bluetooth SIG, Inc. and is used under license by National Semiconductor.

2.0 Functional Block Diagram

Link

Manager

UART

Transport

UART

Bluetooth

TM

Core

Processor

XTAL

ROM

Audio

Port

2.4GHz

TXD
RXD
RTS#
CTS#

SCLK
SFS

STD
SRD

CompactRISC

Combined

System and

Patch RAM

CVSD

Codecs

Config

LFO

OP3
OP4/PG4
OP5

Antenna

Radio

Voltage

Regulator

EEPROM

32KHz

Options

32K+

32k-

RESET#

POR

GPIO

PG6
PG7

POWER_D#

www.national.com 3

LMX9838

3.0 Features

 Compliant with the Bluetooth 2.0 Core Specification
 Better than -80 dBm input sensitivity
 Class 2 operation
 Low power consumption
 High integration:

– Implemented in 0.18 µm CMOS technol ogy
– Includes antenna, Crystal, EEPROM, LDO

3.1 DIGITAL HARDWARE

 Baseband and Link Management processors
 CompactRISC Core
 Embedded ROM and Patch RAM memory
 UART Command/Data Port:

– Support for up to 921.6k baud rate

 Auxiliary Host Interface Ports:

– Link Status
– Transce iver Status (Tx or Rx)

 Advanced Power Management (APM) features
 Advanced Audio Interface for external PCM codec

3.2 FIRMWARE

 Complete Bluetooth Stack including:

– Baseband and Link Manager
– L2CAP, RFCOMM, SDP
–Profiles:

–GAP
–SDAP
– SPP

 Additional Profile support on Host. e.g:

– Dial Up Networking (DUN)
– Facsimile Profile (FAX)
– File Transfer Protocol (FTP)
– Object Push Profile (OPP)
– Synchronization Profile (SYNC)
– Headset (HSP)
– Handsfree Profile (H FP)
– Basic Imaging Profi le (BIP)
– Basic Printing Profile (BPP)

 On-chip application including:

– Default connections
– Command Interface:

– Link setup and configuration (also Multipoint)
– Configuration of the module
– Service database modifications

– UART Transparent mode
– Optimized cable replacement:

– Automatic transpa ren t mode
– Event filter

3.3 DIGITAL SMART RADIO

 Supports low-power mode with:

– Optional 32.768 kHz oscillator

 Synthesizer:

– Integrated crystal oscillator (VCO)
– Provides all clocking for radio and baseband func-

tions

 Embedded antenna
 Integrated transmit/ receiv e switc h (full du plex o peratio n

via antenna port)

 Better than -80 dBm input sensitivity
 0 dBm typical output power

3.4 PHYSICAL

 Compact size - 10 mm x 17 mm x 1.85 mm
 Complete system interface provided in Lead Grid Array

on underside for surface mount assembly

4.0 Order Information

Table1. Order Information

Order Number Spec Shipment Method

LMX9838SB

NOPB

a

388 pcs Tray

LMX9838SBX

NOPB

a

a. NOPB = No Pb (No Lead)

2500 pcs T ape & Reel