Texas Instruments TSU6721EVM User manual

User's Guide
SLVUA77–May 2014
TSU6721EVM Micro-USB Switch Evaluation Module
This document is the user’s guide for the TSU6721EVM micro-USB switch evaluation module (EVM). The
TSU6721EVM is designed to evaluate and demonstrate the functionality of TI’s TSU6721 micro-USB
switch.
This guide contains an introduction, setup instructions, the EVM schematic, top and bottom board layouts,
and a bill of materials.
Contents
1 About This Manual........................................................................................................... 2
1.1 Information about Cautions and Warnings ...................................................................... 2
1.2 Items Required for Operation ..................................................................................... 2
1.3 Items Recommended for Operation.............................................................................. 2
2 Introduction ................................................................................................................... 3
3 Setup .......................................................................................................................... 3
3.1 Header and Jumper Connection Descriptions .................................................................. 3
3.2 LaunchPad Hardware and Firmware Setup .................................................................... 5
3.3 GUI Software Setup ................................................................................................ 8
3.4 Getting Started Using the TSU6721 Micro-USB Switch EVM ................................................ 9
4 Schematic ................................................................................................................... 15
5 Board Layout................................................................................................................ 16
6 Bill of Materials ............................................................................................................. 20
List of Figures
1 TSU6721EVM................................................................................................................ 3
2 Proper Jumper Configuration on the LaunchPad........................................................................ 5
3 Proper Orientation for the TSU6721EVM on the LaunchPad.......................................................... 6
4 TSU6721EVM GUI Without LaunchPad.................................................................................. 9
5 TSU6721EVM GUI After Connecting the LaunchPad to the Computer............................................. 10
6 TSU6721EVM GUI Showing ID Detection of a UART Cable......................................................... 11
7 TSU6721EVM GUI Showing SDP Charger Detection................................................................. 12
8 TSU6721EVM GUI Showing Manual Switching Mode ................................................................ 13
9 TSU6721EVM GUI Showing Manually Closed DM and DP Switches .............................................. 14
10 TSU6721EVM Schematic ................................................................................................. 15
11 PCB Layer 1 (Top Layer).................................................................................................. 16
12 PCB Layer 2 (VBUS) ...................................................................................................... 17
13 PCB Layer 3 (GND)........................................................................................................ 18
14 PCB Layer 4 (Bottom layer)............................................................................................... 19
List of Tables
1 Device and Package Configurations ...................................................................................... 3
2 TSU6721EVM Bill of Materials ........................................................................................... 20
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About This Manual www.ti.com
1 About This Manual
1.1 Information about Cautions and Warnings
The information in a caution or a warning is provided for your protection. Please read each caution and
warning carefully.
CAUTION
This EVM contains components that can potentially be damaged by
electrostatic discharge (ESD). Always transport and store the EVM in its
supplied ESD bag when not in use. Handle while using an antistatic wristband.
Operate on an antistatic work surface. For more information on proper
handling, see the Electrostatic Discharge (ESD) application note (SSYA008).
1.2 Items Required for Operation
The following items are required to use the TSU6721EVM:
• TSU6721EVM
• TSU6721 datasheet (SCDS338) from www.ti.com
• Two power supplies for VBAT and VDDIO
– 3.3 V at 100 mA recommended for each
1.3 Items Recommended for Operation
The following items are recommended for use with the TSU6721EVM:
• MSP430™ LaunchPad™
– Recommended rev 1.5
– MSP430G2553 installed
• USB standard-A to mini-B cable
• Computer running Microsoft®Windows®7 with 2 available USB ports
• TSU6721EVM software, available from the TSU6721EVM webpage
MSP430, LaunchPad are trademarks of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
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www.ti.com Introduction
2 Introduction
The TSU6721EVM can be used as a standalone board or paired with the MSP-EXP430G2 LaunchPad to
facilitate power and I2C communication. When paired with the LaunchPad, The TSU6721EVM graphical
user interface (GUI) can be used to read from or write to internal registers of the TSU6721 micro-USB
switch, allowing the user to observe or control the switching of the device through I2C.
Table 1. Device and Package Configurations
MICRO-USB Switch IC Package
U1 TSU6721YFFR DSBGA-32
Figure 1. TSU6721EVM
3 Setup
This section describes the header and jumper connections on the TSU6721EVM, installation of the
firmware on the MSP430 LaunchPad, installation of the software (GUI) on the computer, and getting
started using the TSU6721EVM.
3.1 Header and Jumper Connection Descriptions
3.1.1 J2, J4, and J7: Power Input Selectors
Header J2 allows VBAT input from the LaunchPad or external supply. The range is 3 V to 4.4 V.
Header J4 allows VDDIO input from the LaunchPad or external supply. The range is 1.65 V to 3.6 V.
Header J7 allows VBUS input from an external supply or input from micro-USB connector J15 (V_USB).
The range is 4 V to 6.5 V.
3.1.2 J1, J3, and J6: External Power Inputs
Terminal J1 is the external supply connector for J2.
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Terminal J3 is the external supply connector for J4.
Terminal J6 is the external supply connector for J7.
3.1.3 J8 and J9: MSP430 LaunchPad Interface Headers
Headers J8 and J9 are the connectors for the MSP430 LaunchPad to the TSU6721EVM.
3.1.4 J12 and J15: USB Device Path
Connector J12 is a mini-USB connector at the output of the TSU6721.
Connector J15 is a micro-USB connector at the input of the TSU6721.
3.1.5 J5 and J22: USB Through-Path
Connectors J5 and J22 are wired as a short-circuit for through-path evaluation.
3.1.6 J13, J14, J17, and J27: USB Connector-Side Test Points
Test point J13 is for the DP pin/lines.
Test point J14 is for the DM pin/lines.
Test point J17 is for the ID pin/lines.
Test point J27 is for the VBUS pin/lines.
3.1.7 J10, J11, J16, and J28: USB Host-Side Test Points
Test point J10 is for the DP_HT pin/lines.
Test point J11 is for the DM_HT pin/lines.
Test point J16 is for the IDBP pin/lines.
Test point J28 is for the OUT pin/lines (indicated as VBUS_HT on the board).
3.1.8 J19, J23, and J26: Non-USB Host-Side Output Test Points
Test point J19 is for the TxD and RxD (UART) pin/lines.
Test point J23 is for the S_L and S_R (Audio) pin/lines.
Test point J17 is for the MIC output pin/lines.
3.1.9 J21 and J24: VBUS OUT Path Jumpers
Header J21 connects the TSU6721’s OUT pin to VBUS_HT on the board.
Header J24 connects the TSU6721’s OUT pin to a green LED.
3.1.10 J20: I2C Interface
Header J20 is for the SDA and SCL I2C lines. They can be used to probe I2C communications between
the TSU6721 and the LaunchPad, or they can be used as I2C inputs/outputs when the LaunchPad is not
present.
3.1.11 J18 and J29: Hardware Interface Output Test Points
Header J18 is for the JIG, BOOT, and ISET hardware outputs.
Test point J29 is for the INTB interrupt output.
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3.2 LaunchPad Hardware and Firmware Setup
If using the TSU6721EVM GUI, the MSP430 LaunchPad board must be configured properly in order to
flash the processor with the TSU6721EVM firmware. The following steps are provided to use the
TSU6721EVM in conjunction with the LaunchPad.
1. With the LaunchPad unplugged, configure the headers on the LaunchPad to be in HW UART mode by
attaching jumpers on the headers indicated by the yellow boxes in Figure 2:
Figure 2. Proper Jumper Configuration on the LaunchPad
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2. Place the TSU6721EVM on top of the LaunchPad (see Figure 3) so that all connectors on J1 and J2
of the LaunchPad are inserted into J8 and J9 of the TSU6721EVM and the mini-USB connectors on
both boards are facing the same direction.
Figure 3. Proper Orientation for the TSU6721EVM on the LaunchPad.
3. The following jumper configurations on the TSU6721EVM are required for power to be supplied from
the LaunchPad:
(a) J2: 3V3 to VBAT
(b) J4: 3V3 to VDDIO
4. Download the firmware (for the MSP430) and graphical user interface (GUI) software in a zipped folder
located on the TSU6721EVM webpage on www.ti.com.
5. Extract the zip folder.
6. Plug the MSP430 LaunchPad into the computer.
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7. Open the Device Manager by typing "devmgmt.msc" into the Start Menu and pressing ENTER.
8. Select the MSP430 Application, right click →Properties, and click Update Driver Software.... The
MSP430 Application may appear either in Ports or Other Devices.
9. Select the Browse... button in the Browse my computer for driver software dialog box.
10. Select the folder where you extracted TSU6721EVM_Software.zip
11. Click the Next button. Click Close after you see the following image:
12. Flash the MSP430 by double-clicking TSU6721_Flasher.bat in the TSU6721EVM LaunchPad files
folder where you extracted TSU6721EVM_Software.zip.
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13. Verify that the command window says no errors, the device has been recognized as the MSP430G2,
and TSU6721.txt has been programmed into the MSP430, as seen in the following image. A
successful flash of the firmware results in the following command line prompt:
14. Close the window by pressing any key.
3.3 GUI Software Setup
1. Run setup.exe located in the TSU6721_GUI folder. From now on, the TSU6721 software is available
under the Start menu in Programs →Texas Instruments, Inc →TSU6721.exe.
2. If the GUI does not launch automatically, run the installed TSU6721-EVM GUI program from the Start
Menu.
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3. The GUI looks like Figure 4 when it is opened and the LaunchPad is connected:
Figure 4. TSU6721EVM GUI Without LaunchPad
3.4 Getting Started Using the TSU6721 Micro-USB Switch EVM
3.4.1 Evaluating the TSU6721EVM without the GUI
1. The TSU6721EVM can be powered with or without the LaunchPad. If you have a LaunchPad available
and have completed steps 1–3 in Section 3.2, continue to step 2. If you do not have a LaunchPad,
attach the jumper on J2 from VBAT to EXT, and attach jumper on J4 to VDDIO to EXT. Next, apply 3
V to 4.4 V on J1 and apply 1.65 V to 3.6 V on J3.
2. Connect a 150-kΩresistor between ID (J17) and GND (TP1, TP2, or TP3). By default, the TSU6721
closes the appropriate switches as specified in Table 2 of the TSU6721 (SCDS338) datasheet.
3. While referencing the on-resistance values for each signal path in the TSU6721 datasheet, measure
the following resistance values to verify that the switches have been closed:
(a) DM (J14) to TxD (J19)
(b) DP (J13) to RxD (J19)
4. Remove the 150-kΩresistor.
5. Attach a micro-USB cable from the PC to J15 on the TSU6721EVM. As most PCs are considered USB
Standard Downstream Port (SDP) or Charging Downstream Port (CDP) chargers, the TSU6721 closes
the appropriate switches as specified in Table 4 on the TSU6721 datasheet.
6. While referencing the on-resistance values for each signal path in the TSU6721 datasheet, measure
the following resistance values to verify that the switches have been closed:
(a) DM (J14) to DM_HT (J11)
(b) DP (J13) to DP_HT (J10)
7. Remove the micro-USB cable from the PC.
8. Choose any desired charger type or ID resistor specified in either Table 2 or Table 4 of the TSU6721
datasheet to observe the behavior of the TSU6721 switch. The datasheet describes the switch
behavior for each condition.
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9. The user may develop software that uses I2C to communicate with the internal registers of the
TSU6721. See Standard I2C Interface Details on page 18 of the TSU6721 datasheet.
3.4.2 Evaluating the TSU6721EVM with the GUI
1. After completing the steps in Section 3.2 and Section 3.3, launch the TSU6721EVM software. The
screen looks like Figure 5:
Figure 5. TSU6721EVM GUI After Connecting the LaunchPad to the Computer
2. Connect a 150-kΩresistor between ID (J17) and GND (TP1, TP2, or TP3). The TSU6721 closes the
appropriate switches as specified in Table 2 of the TSU6721 datasheet. The ATTACH interrupt will go
high until its register is read.
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3. The GUI looks like Figure 6. Notice the change in ADC[4] through ADC[0] in register 0x07, as well as
the UART bit going high in register 0x0A.
Figure 6. TSU6721EVM GUI Showing ID Detection of a UART Cable
4. Remove the 150-kΩresistor.
5. Attach a micro-USB cable from the PC to J15 on the TSU6721EVM. As most PCs are considered USB
Standard Downstream Port (SDP) or Charging Downstream Port (CDP) chargers, the TSU6721 closes
the appropriate switches as specified in Table 4 on the TSU6721 datasheet.
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6. Click Read All. When the micro-USB cable is attached to the PC, the GUI looks like Figure 7. Notice
the change in register 0x0A, where the SDP bit has gone high after detection.
Figure 7. TSU6721EVM GUI Showing SDP Charger Detection
7. Disconnect the micro-USB cable from the PC.
8. The TSU6721EVM GUI can write to each register specified as Read/Write in the TSU6721 datasheet.
Click on register 0x02, bit 2 (Manual SW). The box turns grey, which means that 0x02 bit 2 has been
set to 0.
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Figure 8. TSU6721EVM GUI Showing Manual Switching Mode
According to page 23 of the TSU6721 datasheet, the TSU6721 is now in manual switching mode.
Attach VBUS or a valid ID resistance to the TSU6721EVM. The attachment will not determine the
switch status, but it will ensure that the TSU6721 does not enter sleep mode, allowing manual
switching to work properly.
9. Connect an ohmmeter between DM (J14) and DM_HT (J11), and connect another ohmmeter between
DP (J13) and DP_HT (J10).
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10. On register 0x13, click DM SW[0] and DP SW[0] (bits 5 and 2). Figure 9 shows that they turn yellow,
indicating they have been set to 1.
Figure 9. TSU6721EVM GUI Showing Manually Closed DM and DP Switches
11. According to page 29 of the TSU6721 datasheet, DP has been connected to DP_HT and DM has
been connected to DM_HT:
While referencing to the specified on-resistance values for each signal path in the TSU6721 datasheet,
measure the following resistance values to verify that the switches have been closed:
(a) DM (J14) to DM_HT (J11)
(b) DP (J13) to DP_HT (J10)
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1
1
2
2
3
3
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6
D D
C C
B B
A A
1 2
TSU6721EVM
4/21/2014
HVL046A.SchDoc
Sheet Title:
Size:
Mod. Date:
File:
Sheet: of
Bhttp://www.ti.com
Contact:http://www.ti.com/support
TSU6721EVMProject Title:
Designed for: Public Release
Assembly Variant: Variant name not interpreted
© Texas Instruments 2014
Drawn By:
Engineer:
Ryan Land
Ryan Land
Texas Instruments and/or its licensors do not warrant the accuracy or completeness of this specification or any information contained therein. Texas Instruments and/or its licensors do not
warrant that this design will meet the specifications, will be suitable for your application or fit for any particular purpose, or will operate in an implementation. Texas Instruments and/or its
licensors do not warrant that the design is production worthy. You should completely validate and test your design implementation to confirm the system functionality for y our application.
Not in version controlSVN Rev:
HVL046Number: Rev: A
micro-USB side
mini-USB (host) side
MSP-430_J9MSP-430_J8
VCC (+3.3V)
Analog In
UART_HW_RX
UART_HW_TX
GPIO (INT)
SPI_A_SCLK
SPI_B_SCLK
GPIO (Cap Touch)
GPIO (Cap Touch)
GPIO (Cap Touch)
GND
Timer Out
GPIO (INT)
Test (SpyBi-Wire)
RESET
SPI_B_SIMO/I2C_SDA
SPI_B_SOMI/I2C_SCL
GPIO (Cap Touch)
GPIO (Cap Touch)
GPIO (Cap Touch)
1 2 3 4 5
6 7 8 9 10 1
1
J22
2 3 41 5
J5
J29
DM
Through path
1
2
3
J2
A B
1
2
3
J4
ISET
BOOT
JIG
J26
TP1 TP2 TP3
GND GND GNDINTB
VDDIO
5
4
1
2
3
6
7
8
9
10
J8
5
4
1
2
3
6
7
8
9
10
J9
GND
GND
VBAT D1
VDDIO A2
VBUS A5
OUT
A4
GND
E5
DP_HT
B1
DM_HT
C1
IDBP
D2
RxD
E1 TxD
E2
VBUS_CAP C3
MIC
B4
GND
D3
GND
D4
S_R
C4 S_L
B3
DM B5
SCL C2
SDA B2
DP C5
ID D5
INTB A1
ISET A3
JIG E4
BOOT E3
U1
TSU6721YFP
GND
1
2
3
4
5
6
7
8
9
10
11
J15
GND
GND
JIG
BOOT
ISET
INTB
2
3
4
1
5
J12
GND
DP_HT
DM_HT
IDBP
21 3
J25
GND
1
2
J23
S_L
S_R
TxD
RxD
S_L
S_R
MIC
VDDIO
VBAT
VBUS
0
R1
J10
J11
Green
D1
1
2
J1
GND
3V3
1
2
J3
GND
VDDIO
VBAT
3V3
1
2
3
J7
1
2
J6
GND
VBUS
V_USB
EXT
VDDIO
3V3
EXT
VBAT
3V3
EXT
VBUS
V_USB
RxD
TxD
INTB
ISET
BOOT
JIG
GND
GND
VBAT
VDDIO
GND
VBUS
SCL
SDA
3V3
GND
SDA
SCL
1
2
3
J18
10k
R5
VBAT
ISET
BOOT
JIG 1
2
J19
RxD
TxD
1
2
J20
SCL
SDA
RxD
TxD
SCL
SDA
INTB
OUT
OUT
VBUS_HT
1
2
J21
J28
1
2
J24
GND
VBUS_HT
VBUS_HT
VBUS_HT
OUT
LED
S_L
S_R
VBUS_HT
MIC
DP
0
R3
J13
0
R4
J14 ID
J17
MIC
J16
VBAT is power input to the board. 3V to 4.4 V.
VDDIO is logic power input to the board. 1.65 V to 3.6 V.
VBUS is secondary USB power to the board. 4 V to 6.5 V.
OUT
J27
VBUS
VBUS
10k
R7
10k
R8
0
R2
330
R9
GND
GND
V_USB
Maximum VBUS to OUT current is programmable (2 A default)
0.1µF
C4
1µF
C3
0.1µF
C2
1µF
C1
0.1µF
C6
1µF
C5
75.0
R6
10µF
C7
www.ti.com Schematic
4 Schematic
Figure 10 shows the schematic for the TSU6721EVM.
Figure 10. TSU6721EVM Schematic
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Board Layout www.ti.com
5 Board Layout
Figure 11 through Figure 14 illustrate the PCB layout drawings for this EVM.
Figure 11. PCB Layer 1 (Top Layer)
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Figure 12. PCB Layer 2 (VBUS)
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Figure 13. PCB Layer 3 (GND)
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Figure 14. PCB Layer 4 (Bottom layer)
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Bill of Materials www.ti.com
6 Bill of Materials
Table 2 lists the BOM for the TSU6721EVM.
Table 2. TSU6721EVM Bill of Materials
Designator Qty. Value Description Package Reference Part Number Manufacturer
PCB1 1 Printed Circuit Board HVL046 Any
C1, C3 2 1uF CAP, CERM, 1µF, 16V, ±10%, X5R, 0603 603 GRM188R61C105KA93D Murata
C2, C4 2 0.1uF CAP, CERM, 0.1µF, 16V, ±10%, X7R, 0402 402 GRM155R71C104KA88D Murata
C5 1 1uF CAP, CERM, 1µF, 50V, ±10%, X7R, 0805 805 GRM21BR71H105KA12L Murata
C6 1 0.1uF CAP, CERM, 0.1µF, 100V, ±10%, X7R, 0603 603 GRM188R72A104KA35D Murata
C7 1 10uF CAP, CERM, 10µF, 16V, ±10%, X5R, 0805 805 GRM21BR61C106KE15L Murata
D1 1 Green LED, Green, SMD 1.6x0.8x0.8mm LTST-C190GKT Lite-On
J1, J3, J6 3 2x1 Conn Term Block, 2POS, 3.81mm, TH PhoenixConact_1727010 1727010 Phoenix Contact
J2, J4, J7, J18 4 Header, TH, 100mil, 3x1, Gold plated, 230 mil above TSW-103-07-G-S TSW-103-07-G-S Samtec, Inc.
insulator
J5, J12 2 Conn Rcpt Mini USB2.0 Type B 5POS SMD USB Mini Type B 1734035-2 TE Connectivity
J8, J9 2 Receptacle 100mil 10x1, Tin, TH Receptacle, 10x1, 100mil, Tin PPTC101LFBN-RC Sullins Connector
Solutions
J10, J11, J13, J14, 10 Header, TH, 100mil, 1pos, Gold plated, 230 mil above Testpoint TSW-101-07-G-S Samtec, Inc.
J16, J17, J26–J29 insulator
J15, J22 2 Receptacle, Micro-USB-B, Right Angle, SMD 105017-0001 Molex
J19–J21, J23, J24 5 Header, TH, 100mil, 2x1, Gold plated, 230 mil above TSW-102-07-G-S TSW-102-07-G-S Samtec, Inc.
insulator
J25 1 Connector, Audio Jack, 3.5mm, Stereo, SMD Audio Jack SMD SJ-3523-SMT CUI Inc.
R1–R4 4 0 RES, 0 Ω, 5%, 0.063W, 0402 402 CRCW04020000Z0ED Vishay-Dale
R5, R7, R8 3 10k RES, 10 kΩ, 5%, 0.1W, 0603 603 CRCW060310K0JNEA Vishay-Dale
R6 1 75 RES, 75.0 Ω, 1%, 0.1W, 0603 603 CRCW060375R0FKEA Vishay-Dale
R9 1 330 RES, 330 Ω, 5%, 0.1W, 0603 603 CRCW0603330RJNEA Vishay-Dale
SH-J1–SH-J4 4 1x2 Shunt, 100 mil, Gold plated, Black Shunt 969102-0000-DA 3M
TP1–TP3 3 Black Test Point, TH, Multipurpose, Black Keystone5011 5011 Keystone
U1 1 MCPC Compatible USB Port Multimedia Switch YFP0025_TSU2721 TSU6721YFP Texas Instruments
Supports USB, UART, Audio, ID, MIC, and Load
Switch, custom YFP0025
FID1–FID3 0 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A
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