Texas Instruments TUSB3410UARTPDK User Manual

Application Report

SLLU043B – JANUARY 2006

TUSB3410UARTPDK User’s Guide

Connectivity Solutions

Contents

Overview..........................................................................................................................................2

1

1.1 What’s Included.........................................................................................................................2

1.2 Hardware/Software Requirements for TUSB3410UARTPDK ...................................................2

1.3 TUSB3410UART EVM Board Overview....................................................................................3

2 System Setup and Procedure ........................................................................................................3

2.1 A Note on PIDs for TUSB3410UART EVM...............................................................................6

3 EVM Materials..................................................................................................................................9

3.1 BOM .......................................................................................................................................9

3.2 Layout .....................................................................................................................................10

3.3 Schematic................................................................................................................................10

Figures

Figure 1.

Figure 2. Typical System Setup........................................................................................................4

Figure 3. Enumeration on Windows 98............................................................................................5

Figure 4. Enumeration on Windows 2000/XP ..................................................................................6

TUSB3410UART Evaluation Module.................................................................................3

1

SLLU043B

1 Overview

The TUSB3410UARTPDK is a product design kit (PDK) intended to showcase the TUSB3410
as a compact USB to serial interface bridge. Together with TI’s Virtual COM Port (VCP)
software, it produces a turnkey, configurable USB/serial bridge solution.

TI provides all components necessary to complete the solution:

• the integrated circuit devices

• firmware to run on the device

• drivers (Windows, Mac OS, Linux)

• utilities and instructions necessary for the designer to implement the solution in the end

design.

The information in this kit is subject to change, and software updates are ongoing. For the latest
information pertaining to this kit, please visit http://www.ti.com/rd/tusb3410uart
version of the software, please visit www.ti.com/rd/tusbwinvcp

1.1 What’s Included

. For the latest

.

This kit contains the following:

• “Getting Started” document (SLLU048B)

• TUSB3410UART EVM

• USB cable (certified by the USB-IF)

• Serial cable

• An application note, “Application of TI’s VCP Software Solution” (SLLA170) which walks the

designer through the process of implementing the VCP solution.

The driver/firmware software package must be downloaded from TI’s website (www.ti.com). TI
distributes this software via the web so that you are sure to get the latest build. Please see the
“Getting Started” document for specific instructions in obtaining the software.

1.2 Hardware/Software Requirements for the TUSB3410UARTPDK

The TUSB3410UART EVM is designed for use with a personal computer running a USB–
enabled operating system. The PC should be compliant with the USB 1.1 or 2.0 specifications.
This implies that the BIOS, chipsets, and operating system are all USB specification compliant.

The TUSB3410UARTPDK is primarily intended for evaluation with the Windows version of the
VCP driver. All descriptions provided in this user’s guide assume that Windows is the software
environment. While the Linux and Mac OS versions could be used as well, they may require
additional configuration. Contact TI if you’re interested in these alternate versions of the driver.

2 TUSB3410UARTPDK User’s Guide

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1.3 TUSB3410UART EVM Board Overview

The TUSB3410UART evaluation module (EVM) provided in this kit is specifically designed to
showcase the TUSB3410 as a compact USB to serial interface bridge. TUSB3410 interfaces
full-speed (12Mbps) USB to a high-speed UART. The EVM adds an RS232 driver to interface to
standard serial port devices.

Included in the TUSB3410 EVM design are an I2C serial EEPROM, a 12MHz crystal, and a 5V­to-.3V low-dropout voltage regulator. The EEPROM contains code to boot the TUSB3410’s
internal 8052 micro controller and other configuration parameters while the 12MHz crystal
provides the clock source for the device. The 5V-to-3.3V voltage regulator converts the 5V USB
bus power to 3.3V, which is required by the TUSB3410.

The EVM operates from 5V USB bus power. A TUSB3410 solution may be either self-powered
or bus powered.

The EVM is 3cm by 6cm. See Fig. 1.

Figure 1. TUSB3410UART Evaluation Module

2 System Setup and Procedure

Download the software per the instructions in the “Getting Started” document accompanying this
kit. Install the driver according to the instructions.

Please run the installer included in the driver package rather than allowing Windows to conduct
the installation. While it is possible to do a proper install by first attaching the EVM and allowing

Windows to complete the installation, running the installer is more automated. The installer
seeks out and resolves any conflicts that could prevent the driver from working properly.

Be sure to run the appropriate version of the installer depending on your version of Windows
(Windows 98/ME or Windows 2000/XP). The installer places both the driver and a firmware file
that will be downloaded to the EVM when it is attached.

Fig. 2 shows the typical system setup.

TUSB3410UARTPDK User’s Guide 3

SLLU043B

Figure 2. Typical System Setup

Attach a serial device to the TUSB3410UART EVM using the serial cable and attach the EVM to
the PC using the USB cable. The first time you attach the EVM to the host PC, Windows
displays “bubble” information in the lower right corner, showing text that originates in the
EEPROM device located on the board. This is information you can customize for your product.

Also located in the EEPROM is a device descriptor containing a Vendor ID (VID) and Product ID
(PID). For the TUSB3410UART EVM, these values are 0x0451 (the VID assigned to TI by the
USB Implementers Forum) and 0x341A (the PID TI has assigned to this EVM), respectively.
The operating system uses the VID/PID combination to identify the type of device that has been
attached, and therefore what driver it needs to load. The VCP driver is configured to respond to
the 0451/341A VID/PID pair.

Furthermore, the EEPROM includes a string descriptor containing a serial number for this EVM.
The operating system uses the combination of the VID, PID, and serial number to distinguish
this particular EVM from other instances off this EVM. For example, COM port settings will be
associated with that particular combination of VID, PID, and serial number. Windows presents
the “Found New Hardware” dialog whenever it sees a new combination of these three values.

If the VCP installer setup was run before attaching the EVM, the installation will occur
automatically. If the installer was not run first, guide Windows to the correct INF files within the
installer directory.

4 TUSB3410UARTPDK User’s Guide

SLLU043B

Note that Windows may state that the driver is not certified by Microsoft. TI has verified that the
driver passes Microsoft’s HCT test setup, but to date has not submitted the driver for
certification. Any certification TI acquires will have to be performed again by target companies
prior to their specific product release due to regulations by Microsoft and the USB IF.
Nevertheless, TI is pursuing certification in the first quarter of 2005.

Because the VCP driver architecture contains two modules, one for the USB functionality and
one for the COM port functionality, Windows will present the “Found New Hardware” dialog
twice. For the same reason, you should be able to see the solution enumerate in two places in
the Windows Device Manager when installation is complete. For the Windows 9x driver, it
enumerates as a “VCP device” and also as a new COM port, as shown in Fig. 3.

Figure 3. Enumeration on Windows 98

For the Windows 2000/XP driver, it enumerates as a “multiport serial adapter”, and also as a
new COM port, as shown in Fig. 4.

TUSB3410UARTPDK User’s Guide 5

SLLU043B

Figure 4. Enumeration on Windows 2000/XP

The serial device should now be accessible.

2.1 A Note on PIDs for TUSB3410UART EVM

Prior to March 2005, the EVM shipped without an EEPROM device in socket U5. As a result,
the TUSB3410 reported its default VID, PID, and serial number to the host, and the INF files for
the VCP driver were configured to associate with these values. TI provides another driver
(AppLoader) that associates with this same VID/PID pair and has found that many users have
run into conflicts due to having both drivers installed on the same host machine. In addition, TI
is planning to release a new utility in 2Q05 that also uses the default VID/PID.

In order to resolve these common conflicts, as well as enable the use of both the VCP software
and the new utility on the same machine, TI has changed the PID reported by the EVM to
“341A”. An EEPROM is now included on each TUSB3410UART EVM to implement this change.

6 TUSB3410UARTPDK User’s Guide

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NOTE: Starting with v104 of the driver, TI is removing PID “3410” from the VCP driver INF files.
Prior versions of the VCP driver are able to recognize either “3410” or “341A”; v104 and later
versions only recognize “341A”. (See Sec. 2.2 for instructions on determining which version is
installed.)

2.2 Identifying Version of VCP Driver

The firmware and Windows driver are characterized by the same versioning nomenclature.
Although there are no known conflicts when the driver/firmware versions do not match, it is
recommended to use matching versions when possible. For example, the v103 driver should be
used with the v103 firmware. If firmware is not included in the EEPROM – as is the case with
the TUSB3410UART EVM – then firmware is downloaded from the host, and this ensures that
the driver and firmware are of the same version.

To determine the version of the Windows 2000/XP driver, locate the “Multi-port serial” device in
the Device Manager, double-click, and click on the “Driver” tab. Look at the last subfield in the
value of the “Driver Version” field (the number after the last decimal).

Figure 5. Windows Driver Properties

TUSB3410UARTPDK User’s Guide 7

SLLU043B

In Fig. 5, this value is “3”. This indicates version v103 of the driver. A “4” would indicate v104,
and so forth.

Prior to v100, there were two digits in this subfield. For example, a “96” indicated v096 of the
driver. (Only two digits are allowed in the field, and the leading 0 is dropped. As a result, this
number rolled to 0 with v100 of the driver.)

Text files within the driver installer also document the version of the driver.

8 TUSB3410UARTPDK User’s Guide

3 EVM Materials

3.1 BOM

Item Reference Designator Part Part Number

1 CN1 Connector-DB9 DB9-HM

SLLU043B

8 C1, C13, C14, C15,

C16, C17, C18, C21
1 C2 4.7 µF C3216X7R1C475M SMT_0805
4 C3, C6, C8, C10 0.1 µF C1608X7R1H104K SMT_0603
2 C4, C5 0.01 µF C1608X7R1H103K SMT_0603
2 C9, C7 0.001 µF C1608X7R1H102K SMT_0603
2 C11, C12 22 pF C1608C0G1H220J SMT_0603
2 C20 ,C19 33 pF C1608C0G1H330J SMT_0603
1 D1 sot-23-Diode BAS21ZXCT-ND SOT23-DIODE
1 D2 LED 160-1421-1-ND SMT_0805
1 F2 TDK MPZ2012S331A MPZ2012S331A MPZ2012
2 JP1, JP2 Jumper HDR1X2
1 R1 90.9 kΩ P100KCCT-ND SMT_0603
1 R2 100 kΩ P100KCCT-ND SMT_0603
1 R3 1.5 kΩ P1.50KCCT-ND SMT_0603
2 R4, R5 RES 33.2 OHM 1/10W 1% P33.2HTR-ND 0603 SMD
3 R9, R10, R15 1 kΩ P1.00KCCT-ND SMT_0603

1 µF C2012X7R1C105M SMT_0805

1 R11 RES 32.4K OHM 1/10W 1% P32.4KHTR-ND 0603 SMD
1 R12 10 kΩ P10.0KCCT-ND SMT_0603
1 R13 15 kΩ P15.0KCCT-ND SMT_0603
1 R20 10 kΩ P1.50KCCT-ND SMT_0603
1 SW1 Switch 7914G-1-000E MOM-SW
7 TP1, TP2, TP3, TP4,

TP5, TP6, TP9
2 TP7, TP8 Test point small TP52
1 U1 TUSB3410 TUSB3410 LQFP-32
1 U2 TPS76933 TPS76933DBVT SOT-5P
1 U3 Type B USB–shield AE1085-ND 4P-B-RECEP
1 U4 SN75LV4737A SN75LV473A SN75LV4737ADB
1 U5 8–pin socket for 24LCxx A400-ND DIP8_SKT

T point R HDR1X1 TP52

TUSB3410UARTPDK User’s Guide 9

SLLU043B

1 Y1 12–MHz crystal HC49SMD P-16695 CRYSTEK

3.2 Layout

3.3 Schematic

10 TUSB3410UARTPDK User’s Guide

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

SUSPEND

ESR=0.2ohm

Voltage Divider Network

TUSB3410 UART Demo
Board 6/04/2002

A

1

2

Sheet of

SIZE

SCALE: NONE

DWG NO:

GPIO1_RXD

X2

GPIO3

NCTS

SDA

SIN

NDTR

X1

SOUT

NDCD
NDSR

GPIO4

GPIO2_TXD

ENn

RI/CP

NRTS

RSTIn

SUSP

SUSP

EARTHGND

DM0

DP0

+1V8

/RW

CLK

SUSP

SIN
RI/CP

SOUT

NDTR

NDCD

NRTS

NCTS

NDSR

+3V3

+3V3

+3V3

+5V

+3V3

+3V3

TP4

1

R2

100k

C11

22pF

TP3

1

TP1

1

SW1

R20

10K

C2033pF

U2

TPS76933

2

3

1 5

4

GND

EN

IN OUT

NC/FB

C12
22pF

R1

90.9k

JP1

12

TP7

1

TP8

1

C2

4.7uF

+5V

DM

DP

GND

U3

Type B USB-Shield

3

1
2

45

6

TP9

1

U5

8pin Socket for 24LCxx

8

5

1
2
3
4

6

7

Vcc

SDA

A0
A1
A2
Vss

SCL

WP

D1

3

1

C1933pF

R3 1.5K

F2

TDK MPZ2012S331A

1 2

12

R12
10K

Y1

12 MHz Crystal HC49SMD

U1

TUSB3410

9

6
7

3

5

2

26

27

28

23
24

1

4

21
20
19
17
16
15
14
13

25

32
31
30

10

11

18

8

29

22

12

RESET

DP0
DM0

VCC

PUR

SUSP

X2

X1/CLKI

GND

TEST0
TEST1

VREGEN

VDD1V8

DTR
RTS

SOUT/IR_SOUT

SIN/IR_SIN

RI/CP

DCD
DSR
CTS

VCC

P3_0
P3_1
P3_3

SDA

SCL

GND

GND

P3_4

CLKOUT

WAKEUP

R10
1K

TP6

1

R15

1K

R9
1K

D2

12

R13
15K

JP2

12

R11

32K

R4

33

TP2

1

R5
33

C21
1uF

C1
1uF

TP5

1

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

RS-232
Male
CONNECTION

+1V8

LDO

I2C

SDA

D+

SCL

+3V3

TUSB3410

CRYSTAL

I2C
EPROM

USB Full
Speed

TUSB 3410 Demo
BLOCK DIAGRAM

+5V Bus Power

D-

32-Pin LQFP

RS-232

VDD18

12Mhz

TUSB3410 UART Demo Board 6/04/2002

A

22

Title

Size Document Number Rev

Date: Sheet

of

NDSR2

NCTS2

RI2

SIN2
NRTS2
NDTR2

SOUT2

NDSR

NRTS2

SOUT

NCTS2

SOUT2

NCTS

RI2

NDTR2

NDSR2

NDTR

SIN2
NDCD2

SIN

NDCD2

NRTS

NDCD

RI/CP

SUSP

NDTR
NRTS
SOUT
SIN
NDCD

NCTS

NDSR
RI/CP

+1V8

+1V8 +1V8

+3V3

+3V3 +3V3 +3V3

+3V3 +3V3

C10

0.1uF

C9

0.001uF

C3

0.1uF

U4

SN75LV4737A

2

1

6

3
4

8

28

7

5

9
10
11
12
13
14

27
26
25
24
23
22
21
20
19
18
17
16
15

C2+

VDD

C1+

VCC
C2-

DIN2

C3+

DIN1

EN

DIN3
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5*

GND

C3-

VSS

C1-

STBY
DOUT1
DOUT2
DOUT3

RIN1
RIN2
RIN3
RIN4

RIN5*

C4

0.01uF

C15

1uF

C14

1uF

C13

1uF

C7

0.001uF

C17

1uF

CN1

Connector-DB9

1
2

3

4

5

6
7
8
9

10

11

C8

0.1uF

C18

1uF

C6

0.1uF

C16

1uF

C5

0.01uF

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