USB3503 Evaluation Board Manual - Microchip Technology

SMSC USB3503 EVB

USB3503 Evaluation Board Manual

Copyright © 2011 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete informationsufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumedfor inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales officeto obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductordevices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the termsand conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement").The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomalysheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where productfailure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and furthertesting and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may beobtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation (“SMSC”). Product names andcompany names are the trademarks of their respective holders.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OFMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIESARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT,SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THEFORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OROTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HASBEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

USER MANUAL Revision 1.0 (08-22-11)


1 IntroductionThis user manual is for the USB3503 Evaluation board. This board can be used to test and evaluatethe functionality of the USB3503 and is ideal for early system integration and software development.The USB3503 EVB provides access to the HSIC upstream and USB downstream ports, as well as theI2C communication pins.

SMSC also has evaluation software that can be used with the USB3503 EVB connected to a TotalPhase Aardvark adaptor. This software allows the user to configure the USB3503 in different waysbefore enumeration as well as monitor and manipulate select status registers during enumeration. Thesoftware can be used to prototype microprocessor software, evaluate the different configurations, andtest how the desired configuration fits into the entire system.

2 Operation

2.1 Contents of the Kit

The USB3503 EVB includes the basic equipment necessary to evaluate the USB3503. The itemsincluded in the kit are:

1. USB3503 EVB

2. 5V DC Power Supply

3. Documentation and Software CD

The kit does not include any downstream USB devices, I2C master hardware, or other componentsfor board customization.

2.2 Initial Bring Up

The USB3503 EVB has a default configuration that allows it to operate as a stand alone hub. To begin,connect the U.FL connectors to the HSIC host. Then, plug the evaluation board into the 5V powersupply. The USB3503 EVB will enumerate as a Generic USB Hub, with the VID and PID equal to thedefault values found in the USB3503 Datasheet.

The default configuration of the USB3503 is to enumerate as a Self Powered Hub. This means that,according to the USB 2.0 specification, the downstream ports are only allowed to provide 500mA ofcurrent to the downsteam device.

Refer to the next chapters to see the customization options associated with the evaluation kit.

3 HardwareThe USB3503 EVB is a board that demonstrates the capabilities of the USB3503. The board consistsof the HSIC upstream and USB downstream ports, a INT_N LED for visual confirmation of the

SMSC USB3503 EVB 2 Revision 1.0 (08-22-11)USER MANUAL


interrupts configured, a header exposing the I2C pins, and additional circuitry that is used for I2Ccommunication.

3.1 HSIC and USB Ports

The downstream USB ports are mounted on the edges of the USB3503 EVB. The downstream portsuse the standard USB Type A receptacle. The label for the port is located near the receptacle. TheHSIC upstream port uses U.FL connectors for Data and Strobe.

3.2 Test Points, Switches and LEDs

There are multiple test points to confirm that the USB3503 EVB is powered properly. TP1 and TP6connect to GND, TP2 connects to the VBAT pin, and TP3 connects to the VDD_CORE_REG pin.

Figure 3.1 Block Diagram of the USB3503 EVB

Figure 3.2 Upstream and Downstream Ports

USB3503

Upstream HSIC

Downstream USB

Downstream USB

Downstream USB

Digital IO

LED

J2: Data

Downstream3 Downstream2 Downstream1

J3: Strobe



The USB3503 EVB also has three switches to manually control the RESET_N and HUB_CONNECTinputs to the part. Figure 3.3 shows the location of the test points (Red) and switches (Yellow).

The USB3503 SCL, SDA, RESET_N, HUB_CONNECT and INT_B pins are also exposed on the J1header. These pins are compatible with the Total Phase Aardvark pinout, where pin 1 of the Aardvarkconnector connects to pin 1 of header J1 (Refer to Figure 4.1 for the proper way to connect theAardvark). The INT_N pin is also connected to LED1 to indicate that an interrupt has occurred. TheLED remains lit until the interrupt is cleared, as described in the USB3503 datasheet.

3.3 Configuration Resistors

There are eight different resistors used to configure the part when the RESET_N pin transitions fromLow (0V) to High(>1.25V). These resistors are used for the REF_SEL pins. Because these resistorsand pads pull up to the 1.8V regulator, any changes to these resistors will need to be done with theboard unpowered. The resistor pads are laid out in a manner that prevents the pull-up resistors frombeing populated at the same time as the pull-down resistors, as shown in Figure 3.4. The followingtables show the proper configuration resistor population requirements for the desired results, theresistor values should match those found in Section 6, "USB3503 EVB Bill of Materials".

Note: The Y1 Oscillator will need to be replaced with the proper frequency if the REF_SEL pins arealtered. Refer to Section 6, "USB3503 EVB Bill of Materials" for recommended oscillatorspecifications.

Figure 3.3 Test points, Switches, Header and LED

Table 3.1 REF_SEL Options

R18 R21 R27 R30 REFCLK(MHZ)

EMPTY EMPTY INSTALL INSTALL 38.4

EMPTY INSTALL INSTALL EMPTY 26.0 (Default)

INSTALL EMPTY EMPTY INSTALL 19.2

TP2

TP1

J 1

Pin1

LED1HUB_CONNECT

RESETTP3

TP6

NOT USED



3.4 Additional Circuitry

The U1 Regulator provides 3.3V to the VBAT pin, and also supplies power to the 26MHz clockoscillator. If a higher VBAT voltage is desired, remove R1 and supply the power through TP2.

The U2 Regulator provides 1.8V to the VDD_CORE_REG pin as well as providing the pull up voltagefor the digital control pins. To provide external power to the VDD_CORE_REG pin remove R8 andsupply the power through TP3.

The USB3503 can function with a single power supply; to do this remove R8 and place a 0Ohmresistor on R9. This connects the VDD_CORE_REG pin to the VDD33_BYP pin allowing theUSB3503’s internal 3.3V regulator to supply the VDD_CORE_REG voltage.

Below is a summary of the different power options and what resistors need to be populated to supportthese options:

INSTALL INSTALL EMPTY EMPTY 12.0

Figure 3.4 Configuration Resistors

Table 3.2 VBAT and VDD_CORE_REG source control

R1 R8 R9 VBAT SOURCEVDD_CORE_REG

SOURCE

INSTALL INSTALL EMPTY Onboard Regulator Onboard Regulator

EMPTY INSTALL EMPTY External (TP2) Onboard Regulator

EMPTY EMPTY EMPTY External (TP2) External (TP3)

Table 3.1 REF_SEL Options

R18 R21 R27 R30 REFCLK(MHZ)



Below are the locations of the resistors on the back side of the board:

INSTALL EMPTY INSTALL Onboard Regulator VDD33_BYP

EMPTY EMPTY INSTALL External (TP2) VDD33_BYP

Figure 3.5 Regulator resistors

Table 3.2 VBAT and VDD_CORE_REG source control

R1 R8 R9 VBAT SOURCEVDD_CORE_REG

SOURCE

R1

R8

R5

R9

R35



4 SoftwareThe USB3503 EVB comes with a CD that contains evaluation software that can be used with the TotalPhase Aardvark USB-I2C adaptor (not included with the Evaluation Kit). To install the software, runSetup.exe, found on the CD. This will install the USB3503 Evaluation Software, the LabVIEW Run-time engine (to run the executable), and the Total Phase drivers to communicate with the Aardvark.Once the software has been installed, locate and run the USB3503 Evaluation.exe program on thecomputer. Connect the Aardvark to the USB3503 EVB with the red wire facing the power port, as inFigure 4.1.

The software allows the user to control the digital input pins RESET_N and CONNECT. It also canmonitor the INT_N pin for interrupts. There is a section to communicate with the I2C serial port, as wellas some quick configuration and customization options.

Figure 4.1 Aardvark Connection

Figure 4.2 USB3503 Evaluation Screen



4.1 Digital Control

The RESET_N and HUB_CONNECT pins can be controlled in real time with the Digital Control array.Each button in the array corresponds to the pin with the matching name. When the button is orange,the pin is at logic level High. When the button is black the voltage is a logic level Low. Refer to thegreen box in Figure 4.3 for the digital control array location.

Set the RESET_N pin low to reset the part and place it into the lowest power state. If the CONNECTpin is low when the RESET pin transitions from low to high, the USB3503 will remain in a state thatallows the serial interface registers to be manipulated. To enumerate the hub, either write 00h toregister E7h, or drive the CONNECT pin high by pressing the CONNECT button in the Digital Control.Once the USB3503 has enumerated, the serial interface registers should not be modified.

Notes: To prevent the Aardvark from driving against another voltage, the Aardvark is running in anOpen/Drain mode, therefore it is important that all switches on the board pull the pins up tothe Vcc value.

4.2 I2C Communication

The application also contains a general I2C register read/write section. The Bit and Descriptiondisplay the serial interface register descriptions found in the USB3503 datasheet. The Register displaycan be used to select the proper serial interface register to manipulate. Click on the Value or Bit boxabove to change the value of the register. Once the desired value and register are selected, press theWrite button to change the value on the part. Click on the Read button and the Value and Bit boxeswill update the current value on the part. Refer to the USB3503 datasheet for a detailed description ofeach register and operation of the device

Figure 4.3 Digital Control (Green) and I2C (Yellow) sections



4.3 Quick Configuration and Customization

The USB3503 Evaluation program also contains some quick configuration and customization optionsthat automatically update the registers to match the desired configuration. The USB3503 canenumerate as a Self Powered or Bus Powered Hub with 1, 2 or 3 downstream ports. The VID, PID,DID and enumeration strings can also be customized to allow the USB3503 to enumerate withwhatever identification is desired.

To change these values; update the configuration section to the desired options, then press theConfigure button. The part will then reset, pull the CONNECT pin low and update the registers asspecified. To go with these options either raise the CONNECT pin, or press the Connect button.

Figure 4.4 Quick Configuration Options



5 USB3503 EVB Schematic

Figure 5.1 USB3503 EVB Schematic

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6 USB3503 EVB Bill of Materials

Figure 6.1 USB3503 EVB Bill of Materials

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es10

1J1

HE

AD

ER

, 2 X

5, 0

.1 IN

CH

, VE

RTI

CA

LS

AM

1030

-05-

ND

SA

MTE

CTS

W-1

05-0

7-L-

DY

es11

J2 J

3C

ON

N R

EC

PT

U.F

LH

9161

CT-

ND

HIR

OS

EU

.FL-

R-S

MT

(10)

Yes

122

J4 J

5H

EA

DE

R, 1

X 2

, 0.1

INC

H, V

ER

TIC

AL

WM

6402

-ND

MO

LEX

22-2

8-40

20Y

esJ4

J5

131

J6C

ON

NE

CTO

R P

OW

ER

JA

CK

2.1

X5.

5MM

HIG

H C

UR

RC

P-0

02A

H-N

DC

UI S

TAC

KP

J-00

2AH

Yes

141

L1FE

RR

ITE

BE

AD

, 120

OH

M, 0

.5A

, 0.1

DC

R, 0

603

P10

750C

T-N

DP

AN

AS

ON

ICE

XC

-3B

P12

1HY

es15

1LE

D1

LED

GR

EE

N S

MT

404-

1005

-1-N

DS

TAN

LEY

BG

1111

C-T

RY

es16

1LE

D2

LED

GR

EE

N 2

X1.

2MM

568

NM

GN

WTR

CLR

SM

D75

4-11

31-1

-ND

Kin

gbrig

htA

PT2

012S

GC

Yes

174

MTH

1 M

TH2

MTH

3 M

TH4

MO

UN

TIN

G P

AD

MTG

250C

140D

183

P1

P2

P3

RE

CE

PTA

CLE

, US

B, S

TYLE

B, R

IGH

T A

NG

LE60

9-10

45-N

DFC

I87

520-

0010

BLF

Yes

191

P4C

ON

NE

CTO

R R

EC

EP

T U

SB

MIN

I AB

5P

OS

RT

AN

GW

M17

122C

T-N

DM

OLE

X56

579-

0576

Yes

P4

200

P5C

ON

NE

CTO

R R

EC

EP

T M

ICR

O U

SB

TY

PE

AB

SM

TA

9779

9CT-

ND

TYC

O E

LEC

TRO

NIC

S19

8158

4-1

Yes

P5

212

R1

R5

R8

R35

RE

SIS

TOR

ZE

RO

OH

M 1

/4W

5%

120

631

1-0.

0ER

CT-

ND

YA

GE

OR

C12

06JR

-070

RL

Yes

R35

221

R2

RE

S 5

1.0K

OH

M 1

/10W

1%

040

2 S

MD

P51

.0K

LCT-

ND

Pan

ason

ic -

EC

GE

RJ-

2RK

F510

2XY

es23

2R

3 R

7R

ES

30.

1K O

HM

1/1

0W 1

% 0

402

SM

DP

30.1

KLC

T-N

DP

anas

onic

- E

CG

ER

J-2R

KF3

012X

Yes

2415

R4

R10

R11

R13

R14

R15

R

16R

18R

19 R

20 R

21 R

23R

24 R

26 R

27 R

28 R

29R

30R

34

RE

SIS

TOR

10K

OH

M 1

/16W

5%

040

2 S

MD

P10

KJC

T-N

DP

AN

AS

ON

ICE

RJ-

2GE

J103

XY

esR

18 R

23 R

28 R

29

R30

251

R6

RE

S 1

4.3K

OH

M 1

/10W

1%

040

2 S

MD

P14

.3K

LCT-

ND

Pan

ason

ic -

EC

GE

RJ-

2RK

F143

2XY

es

264

R9

R12

R25

R31

R32

R33

R

39 R

40R

ES

ISTO

R Z

ER

O O

HM

1/1

6W 5

% 0

402

SM

D31

1-0.

0JR

CT-

ND

YA

GE

OR

C04

02JR

-070

RL

Yes

R9

R25

R32

R39

R

4027

3R

17 R

22 R

38R

ES

ISTO

R 1

.0K

OH

M 1

/16W

5%

040

2 S

MD

P1.

0KJC

T-N

DP

AN

AS

ON

ICE

RJ-

2GE

J102

XY

es28

1R

36R

ES

ISTO

R 1

2.0K

OH

M 1

/20W

1%

020

1 S

MD

P12

.0K

AB

CT-

ND

PA

NA

SO

NIC

ER

J-1G

EF1

202C

Yes

291

R37

RE

SIS

TOR

330

OH

M 1

/16W

1%

040

2 S

MD

311-

330L

RC

T-N

DY

AG

EO

RC

0402

FR-0

7330

RL

Yes

301

SW

1S

WIT

CH

TA

CTI

LE 6

MM

EX

TEN

D A

CT

160G

FE

G18

61-N

DE

-SW

ITC

HTL

1105

SP

F160

QY

es31

2S

W2

SW

3S

WIT

CH

SLI

DE

SP

DT

SM

D G

ULL

563-

1022

-1-N

DC

OP

AL

ELE

CTR

ON

ICS

CJS

-120

0TB

Yes

322

TP1

TP6

TES

T P

OIN

T LO

OP

CO

MP

AC

T B

LAC

K50

06K

-ND

KE

YS

TON

E50

06Y

es33

2TP

2 TP

3TE

ST

PO

INT

LOO

P C

OM

PA

CT

OR

AN

GE

5008

K-N

DK

EY

STO

NE

5008

Yes

342

TP4

TP5

TES

T P

OIN

T50

15K

CT-

ND

KE

YS

TON

E50

15Y

es35

2U

1 U

2IC

200

MA

LD

O L

INE

AR

RE

G S

OT2

3-6

296-

1530

5-1-

ND

TEX

AS

INS

TRU

ME

NTS

TPS

7930

1DB

VR

Q1

Yes

361

U3

US

B35

03_2

5WLC

SP

SM

SC

US

B35

03Y

es37

1U

4P

OW

ER

SW

ITC

H U

SB

MIC

2026

-1B

576-

2137

-ND

MIC

RE

LM

IC20

26-1

YM

Yes

381

U5

IC S

CH

MIT

T-TR

G IN

V G

ATE

SO

T23-

529

6-10

92-1

-ND

TEX

AS

INS

TRU

ME

NTS

SN

74A

HC

1G14

DB

VR

Yes

391

Y1

OS

CIL

LATO

R P

RO

G 3

.3V

+-5

0PP

M S

MD

AP

3S3E

C-N

DA

BR

AC

ON

AP

3S-2

6.0M

Hz

Yes



7 Revision History

Table 7.1 Customer Revision History

REVISION LEVEL & DATE SECTION/FIGURE/ENTRY CORRECTION

Rev 1.0(7-13-11)

Initial Release


USB3503 Evaluation Board Manual - Microchip Technology

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