National Semiconductor LMX9838DONGLE Manuale di installazione

LMX9838DONGLE Hardware User Guide

1.0 Scope

National Semiconductor LMX9838 Bluetooth™serial don-

gle reference design kit is a plug and play serial adapter for

serial cable replacement applications and more. It is able to

support more profiles than just the Serial Port Profile

(including audio support with external codec boards). By

using the enclosed Simply Blue Commander software, it

allows user to develop their own SW applications easily

given the built in interpreter for HEX commands. SBSmart

is a higher level application tool that provides buttons with

the built in commands to easily set up or demonstrate dif-

ferent profile support using the Simply Blue SPP package.

2.0 General Description

2.1 REFERENCE DESIGN KIT CONTENTS

■LMX9838 Bluetooth serial adapter reference board

■USB Dongle and application software stack

■Null modem cable

■Sedona Lite board (Audio CODEC Board)

■110V to 240V AC to 5V DC power adapter and pigtail

■CDROM with design documents and Simply Blue soft-

ware Application tools.

2.2 LMX9838 BLUETOOTH SERIAL

ADAPTER REFERENCE BOARD

Figure 1. Reference Board and Sedona Lite Board

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

September 2006

Revision 0.2

LMX9838DONGLE Hardware User Guide

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LMX9838DONGLE Hardware User Guide

3.0 Requirement and Setup

3.1 BASIC REQUIREMENT

■X86 PC with serial port.

■One of the following operating system is required.

— Windows 2000

— Windows XP

3.2 APPLICATION SOFTWARE

3.2.1 Simply Blue Commander

Application command oriented tool to generate commands

and watch events in the Simply Blue Command interface

window. Reference the Simply Blue Commander User

Guide document for details.

3.2.2 SBSmart

Easy to use Windows based tool to demonstrate additional

profile support of the Simply Blue functionality. Reference

the SBSmart User Guide for additional details.

3.2.3 Patch Programming

LMX9838 allows for patch programming for firmware

update if necessary. Reference the LMX9838 SW User

Guide document for details. Can also be done with the

Simply Blue Commander tool.

4.0 Functional Description

4.1 POWER SUPPLY

■DC Power Jack (6V max)

■Battery Holder (6V max)

4.2 MAIN SYSTEM

■Reset button for manual Reset

■Jumper option for Baud rate selection

4.3 UART INTERFACE

DB9 connector for RS232 standard PC interface using On-

board level shifter IC for handling LMX9838 module’s 3.3V

UART interface.

4.4 ADVANCE AUDIO INTERFACE

■Support Audio applications

■PCM codec interface (support linear and A-law)

■PCM Master or Slave operation (SW configurable)

■Direct connection to Sedona Lite Board (A-law only)

5.0 Design Consideration

5.1 POWER MANAGEMENT

■3.3V output single LDO is used to provide power for

RS232 interface chip and Digital portion of the LMX9838.

Figure 2. System Block Diagram

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LMX9838DONGLE Hardware User Guide

6.0 Layout Consideration

The LMX9838 reference design is split into 2 sections, one

section is RS232 transceiver circuit for PC connection,

another section is LMX9838 main circuit for Host proces-

sor. (Figure 3)

6.1 PCB REQUIREMENT

■2 layers PCB required

■1 mm overall thickness

6.2 LAYERS CLASSIFICATION

■Top layer is the components and main signals layer

■Bottom layer is interface signals and ground plane

■RF circuit requirement

■Large ground plane with ground via’s is must for good

RF performance

7.0 AUDIO CODEC Board

Sedona Lite Board contains an audio codec and two phone

jacks. This board can be used in conjuction with

LMX9838DONGLE to realize audio transmission and

reception. See Table9

8.0 Board components and Pin As-

signments

A summary of the configuration and selection jumpers is

provided in the tables that follow. Reference both the sche-

matic and PCB layout (included on the CD in the kit)

Table 1 Major Components List

Device Description

U1 National LMX9838 Serial Port Module - Refer-

ence the device datasheet.

U3 National LP3985 Low-Dropout Voltage Regula-

tor

U2 Maxim MAX3225 1 Mbps High Speed UART

Driver

Table 2 Connectors Summary

Connector Description Details

J7 Battery Connector

2mm pitch

Maximum input volt-

age is 6V

J6 DC jack Same as above

J8 DP9 serial connec-

tor (male)

See Table 5

J5 External processor

interface

See Table 6

J4 Advance Audio

interface

See Table 7

Table 3 Jumper and Test Point Summary

Jumper /

Test Point Description Details

J1, J2 and

Clock & UART set-

ting jumper

See Table 8

Table 4 Switch and LEDs

Switch/LED Description

S1 Reset button

D1 Operation Status

D2 Data Traffic (TX/RX)

Table 5 J8 DP9 (male) Pin Assignments

Pin # Signal name Description

1 NC No connection

2 RxD Receive Data (input)

3 TxD Transmit Data (output)

4 NC No connection

5 GND Ground

6 NC No connection

7 RTS Ready to send (output)

8 CTS Clear to send (input)

9 NC No connection

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LMX9838DONGLE Hardware User Guide

Table 6 J5 External Processor Interface

Pin # Signal name Description

1 POWER_D# ON/OFF control of LMX9838

2 VCC LDO output (3.3V)

3 GND Ground

4 TXD Transmit Data (output)

5 CTS# Clear to send (input)

6 RXD Receive Data (input)

7 RTS# Ready to send (output)

8 VCC_CORE

_IN

1.8V voltage regulator input/out-

put

9 RESET# Reset (input)

Table 7 J4 Advance Audio Interface

Pin # Signal name Description

1VCC LDO output (3.3V)

2SCLK Advanced Audio Interface Clock

3STD Advanced Audio Interface

Transmit Data

4SFS Advanced Audio Interface Frame

Synchronization

5SRD Advanced Audio Interface

Receive Data

6GND Ground

Table 8 UART interface setting

J2 J3 J1 UART baud rate

Short Short Short 921600bps

Short Open Short 115200bps(default)

Open Short Short 9600bps

Open Open Short NVS (Default 9600bps)

Table 9 J4 (Audio CODEC Board)

Pin # Signal name Description

1Vcc 3.3V Input

2SCLK PCM Clock

3STD PCM Input Data

4SFS PCM Frame Synchronization

5SRD PCM Output Data

6GND Ground

Table 10 Audio Connection

P17 For PC Microphone

P15 For PC Headphone

Figure 3. Top view of Reference board

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LMX9838DONGLE Hardware User Guide

9.0 Bill of materials (Reference Board)

10.0 Bill of Materials (Sedona Lite Board)

Item Name Description Vendor Part Number

C5,C6 Capacitor 22p 0603 C0G 50V MuRata GRM39C0G220J50

C1,C3,C8,

C10 Capacitor 100n 0603 Y5V 50V MuRata GRM39Y5V104Z50

C2,C4,C7 Capacitor 2u2F 0603 Y5V 10V MuRata GRM39Y5V225Z10

C9 Capacitor 100p 0603 C0G 50V MuRata GRM39C0G101J50

C11,C12 TANT CAP 1uF 16V SIZE A Any

C13,C14,C15,

C16,C17 Capacitor 1uF 1206 X7R 25V MuRata GRM42-6X7R105K25

C19 Capacitor 1uF 0603 Y5V 10V MuRata GRM39Y5V105Z10

J7 Battery holder (2mm pitch) Any

S1 TACK SWITCH TS-1135HS RAINBOW

Y1 Tuning fork crystal 32.768KHz Any

J6 DC POWER JACK Morning star limited DC-015

D1 Red Color LED 0603 Size Any

D2 Blue Color LED 0603 Size Any

J8 DB9 (male) serial connector Any

J4 2mm Socket (6 poles) Any

U1 Bluetooth SPP Micro Module National Semiconductor LMX9838SM

U3 Low Dropout Regulator National Semiconductor LP3985IM5X-3.3

U2 High Speed RS232 Transceivers Maxim MAX3225EEAP+

R1,R2,R3 Resistor 0603 Size, 1K Any

R11,R12 Resistor 0603 Size, 10K Any

R6,R7,R8,R9,

R13,R14,R17 Resistor 0603 Size, 0R Any

R4,R5 Resistor 0603 Size, 330R Any

J3,J10 2mm header Any

J1,J2 2mm header (with jumper) Any

Item Name Description Vendor Part Number

C3,C4,C5,C6 Capacitor 100nF Any Ceramic cap

C6 Capacitor 1uF Any Ceramic cap

C12 TANT CAP 10uF, 10V Any

C40 TANT CAP 47uF, 6.3V Any

C11 Not mount

J1 2mm socket (6 poles) Any

J2 2.54mm socket (2 x 4 poles) Any

P15 Socket for speaker (mono) Morning Star MSJ-1537

P17 Socket for microphone (mono) Morning Star MSJ-1537

R10 Resistor 0402 Size, 10R Any

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LMX9838DONGLE Hardware User Guide

11.0 References

■LMX9838 Bluetooth Serial Port Module data sheet

■LMX9838 Bluetooth Serial Port Module - Software Users

Guide

■SBSmart user guide

R13,R14 Resistor 0402 Size, 1K Any

R5,R22 Resistor 0402 Size, 4.7K Any

R3 Resistor 0402 Size, 10K Any

R4,R8,R9 Resistor 0402 Size, 47K Any

U2 Single Rail Codec OKI MSM7717-01MS-K

Item Name Description Vendor Part Number

Figure 4. Sedona Board

LMX9838DONGLE Designer Guide

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or systems which,

(a) are intended for surgical implant into the body, or (b) support

or sustain life, and whose failure to perform, when properly used

in accordance with instructions for use provided in the labeling,

can be reasonably expected to result in a significant injury to the

user.

2. A critical component is any component of a life support device

or system whose failure to perform can be reasonably expected

to cause the failure of the life support device or system, or to af-

fect its safety or effectiveness.

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Tel: 1-800-272-9959

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