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TPS65994
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Texas Instruments TPS65994 User Manual

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Table of Contents
User’s Guide
TPS65994 EVM User Guide
ABSTRACT
This document is the user guide for the TPS65994 Evaluation Module. The TPS65994 EVM allows for evaluation of the TPS65994 IC (WCSP and QFN package) functionality as part of a stand-alone testing kit and for development and testing of USB Type-C™ and Power Delivery (PD) end products.
1 About this Manual...................................................................................................................................................................3
2 Items Required for Operation................................................................................................................................................ 3
3 Introduction.............................................................................................................................................................................3
4 Setup........................................................................................................................................................................................4
4.1 Switch, Push Button, Connector, and Test Point Descriptions...........................................................................................4
4.2 LED Indicators Description.................................................................................................................................................9
5 Tiva USB to I2C Bridge Support Integration...................................................................................................................... 10
5.1 Flash Application Firmware to EEPROM......................................................................................................................... 10
5.2 Entering Debug Mode...................................................................................................................................................... 13
6 Using the TPS65994EVM......................................................................................................................................................17
6.1 Powering the TPS65994EVM.......................................................................................................................................... 17
6.2 Firmware Configurations.................................................................................................................................................. 17
7 Connecting the EVM.............................................................................................................................................................18
7.1 Connecting to Various Devices........................................................................................................................................ 18
8 Debugging the EVM..............................................................................................................................................................19
8.1 Connection Not Established.............................................................................................................................................19
8.2 Resetting Behavior...........................................................................................................................................................19
9 TPS65994EVM Schematics.................................................................................................................................................. 20
10 TPS65994EVM Board Layout.............................................................................................................................................27
11 TPS65994EVM Bill of Materials..........................................................................................................................................32
12 TPS65994QFNEVM Schematics........................................................................................................................................ 36
13 TPS65994QFNEVM Board Layout..................................................................................................................................... 44
14 TPS65994QFNEVM Bill of Materials..................................................................................................................................49
15 Revision History................................................................................................................................................................. 53
List of Figures
Figure 4-1. TPS65994 Power Path Jumper Configuration.......................................................................................................... 4
Figure 4-2. ADCIN1 and ADCIN2 Configuration Schematic........................................................................................................5
Figure 4-3. Barrel Jack (J2) Schematic....................................................................................................................................... 5
Figure 4-4. USB Type-C™ Receptacle (J3_PA) Schematic........................................................................................................ 6
Figure 4-5. USB Type-C™ Receptacle (J3_PB) Schematic........................................................................................................6
Figure 4-6. USB Micro-B Receptacle (J6) Schematic..................................................................................................................7
Figure 4-7. Aardvark Connector (J9) Schematic......................................................................................................................... 7
Figure 4-8. Debug Header (J4) Schematic.................................................................................................................................. 8
Figure 4-9. Debug Header (J5) Schematic.................................................................................................................................. 9
Figure 5-1. Application Customization Tool............................................................................................................................... 10
Figure 5-2. I/O Config Register.................................................................................................................................................. 11
Figure 5-3. Flash Project to EEPROM (I2C)..............................................................................................................................12
Figure 5-4. USB to I2C/SPI Adapter Settings............................................................................................................................ 13
Figure 5-5. I2C Addresses.........................................................................................................................................................14
Figure 5-6. Addressing range.................................................................................................................................................... 15
Figure 5-7. Transmit Source Capabilities...................................................................................................................................16
Figure 9-1. TPS65994EVM Block Diagram............................................................................................................................... 20
Figure 9-2. TPS65994EVM PD Controller................................................................................................................................. 21
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Trademarks
Figure 9-3. TPS65994EVM Power Supplies..............................................................................................................................21
Figure 9-4. TPS65994EVM USB Type-C™ Connector.............................................................................................................. 22
Figure 9-5. TPS65994EVM Tiva Debug.................................................................................................................................... 24
Figure 9-6. TPS65994EVM Connectors.................................................................................................................................... 25
Figure 9-7. TPS65994EVM Expansion Connector.................................................................................................................... 26
Figure 10-1. TPS65994EVM Top Silk Screen............................................................................................................................27
Figure 10-2. TPS65994EVM Top Layer.....................................................................................................................................27
Figure 10-3. TPS65994EVM GND Plane 1............................................................................................................................... 28
Figure 10-4. TPS65994EVM High Speed Layer........................................................................................................................28
Figure 10-5. TPS65994EVM GND Plane 2............................................................................................................................... 29
Figure 10-6. TPS65994EVM Power 1 Layer............................................................................................................................. 29
Figure 10-7. TPS65994EVM Power 2 Layer............................................................................................................................. 30
Figure 10-8. TPS65994EVM GND Plane 3............................................................................................................................... 30
Figure 10-9. TPS65994EVM Bottom Layer............................................................................................................................... 31
Figure 10-10. TPS65994EVM Bottom Silk Screen.................................................................................................................... 31
Figure 12-1. TPS65994QFNEVM Block Diagram......................................................................................................................36
Figure 12-2. TPS65994QFNEVM PD Controller....................................................................................................................... 37
Figure 12-3. TPS65994QFNEVM Power Supplies.................................................................................................................... 38
Figure 12-4. TPS65994QFNEVM USB Type-C™ Connector ....................................................................................................39
Figure 12-5. TPS65994QFNEVM Tiva Debug...........................................................................................................................41
Figure 12-6. TPS65994QFNEVM Connectors...........................................................................................................................42
Figure 12-7. TPS65994QFNEVM Expansion Connector...........................................................................................................43
Figure 13-1. TPS65994QFNEVM Top Silk Screen.................................................................................................................... 44
Figure 13-2. TPS65994QFNEVM Top Layer............................................................................................................................. 44
Figure 13-3. TPS65994QFNEVM GND Plane 1........................................................................................................................45
Figure 13-4. TPS65994QFNEVM High Speed Layer................................................................................................................ 45
Figure 13-5. TPS65994QFNEVM GND Plane 2........................................................................................................................46
Figure 13-6. TPS65994QFNEVM Power 1 Layer......................................................................................................................46
Figure 13-7. TPS65994QFNEVM Power 2 Layer......................................................................................................................47
Figure 13-8. TPS65994QFNEVM GND Plane 3........................................................................................................................47
Figure 13-9. TPS65994QFNEVM Bottom Layer........................................................................................................................48
Figure 13-10. TPS65994QFNEVM Bottom Silk Screen............................................................................................................ 48
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List of Tables
Table 4-1. S1 and S2: ADCIN1 and ADCIN2 Switch Settings..................................................................................................... 4
Table 4-2. Port A MUX CTL LED................................................................................................................................................. 9
Table 4-3. Port B MUX CTL LED................................................................................................................................................. 9
Table 11-1. TPS65994EVM BOM.............................................................................................................................................. 32
Table 14-1. TPS65994QFNEVM Bill of Materials...................................................................................................................... 49
Trademarks
USB Type-C™ are trademarks of USB Implementers Forum. All trademarks are the property of their respective owners.
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About this Manual

1 About this Manual

This user's guide describes the TPS65994 EVM. The guide consists of an introduction, setup instructions, the EVM schematic, board layouts, component views, internal power (PWR) and ground (GND) plane layouts, and a bill of materials (BOM). Refer to TPS65994QFNEVM schematic, board layouts, component views when evaluating TPS65994 QFN package.

2 Items Required for Operation

The following items are required to use the TPS65994 EVM:
• TPS65994 data sheet
• TPS65994 EVM
• TPS65994 Application Customization Tool
• 20-V barrel jack adapter or DC power supply
• Passive USB Type-C™ cables
• USB Type-A to USB Micro-B cable
• USB Type-A to USB Type-B cable
• Mini-DisplayPort to DisplayPort cables
• DP-Expansion Board
• Notebook with USB 2.0, USB 3.0, and DP capabilities

3 Introduction

The TPS65994 is a stand-alone USB Type-C and Power Delivery (PD) controller providing cable plug and orientation detection at the USB Type-C connector. Upon cable plug and orientation detection, the TPS65994 communicates on the CC line using the USB PD protocol. When cable detection and USB PD negotiation are complete, the TPS65994 enables the appropriate power path and configures external multiplexers and alternate mode settings. This user guide describes how the TPS65994 EVM can be used to test DisplayPort alternate mode as well as USB Data. This guide also contains testing procedures of DP alternate mode as well as various PD power configurations. The EVM is customizable through the TPS65994 Configuration Tool. Additionally, the EVM is equipped with Tiva MCU and Aardvark connector to SPI or I2C interfaces for debugging and development.
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4 Setup

This section describes the various EVM features and how to test these features. Schematic screen shots, pictures, and block diagrams are provided as necessary.

4.1 Switch, Push Button, Connector, and Test Point Descriptions

Components described in this section are listed with respect to the EVM from left to right and top to bottom. Related components are listed simultaneously.

4.1.1 Power Path Jumper Configuration

Out of the box, the TPS65994 EVM has jumper configuration for a TPS65994 device. With this configuration, the two internal power paths are configured as Source paths for their respective USB Type-C ports. The two external power paths are configured as Sink paths for their respective USB Type-C ports. When using the TPS65994 EVM, use a TPS65994 template in the TPS65994 Application Customization Tool.
Figure 4-1. TPS65994 Power Path Jumper Configuration

4.1.2 Expansion Ports

J7 and J8 are the connectors for 10G-EXPANSION-EVM Source Board for port A and B respectively. Connect 10G-EXPANSION-EVM Source Board to evaluate DisplayPort and USB 3.2 Data. Both ports can support DP at the same time.
Note
TPS65994 can only support DP_DFP mode. TPS65994 EVM will work with 10G-EXPANSION-EVM Source Board only.

4.1.3 ADCINx Settings

4.1.3.1 S1 and S2: ADCIN1 and ADCIN2
The TPS65994 EVM has a switch (S1) that can be used to configure the ADCIN1 and ADCIN2 pin strapping settings of the TPS65994. ADCIN1 is controlled through S1 and ADCIN2 is controlled through S2. Refer to TPS65994 datasheet to see different ADCINx configurations. Table 4-1 highlights the switch settings to enable the different ADCINx configurations. With all switches on S1 and S2 disabled, switches S4A and S4B can be used to directly short the ADCINx pin to LDO_1V5. The schematic for the ADCIN1 and ADCIN2 configuration switches can be seen in Figure 4-2.
Table 4-1. S1 and S2: ADCIN1 and ADCIN2 Switch Settings
ADCINx Switch Settings
1 2 3 4 Setting
0 0 0 0 0
0 0 1 1 1
0 1 0 1 2
0 1 1 1 3
0 0 1 0 4
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GND
GND
PA_CC1 PA_CC2
PB_ CC1 PB_ CC2
ADCIN2
LDO_3V3
63
1 8
2 7
54
S2
59.0kR22 249kR26 976kR27
GND
All Off Se tting 0
Switch 2 & 4 On S etting 2
Switch 3 & 4 On S etting 1
Switch 2 & 3 & 4 On S etting 3
Switch 3 On Setting 4 Switch 2 On Setting 5 Switch 1 On Setting 6
Switch 1 & 2 On S etting 7
LDO_3V3
ADCIN1
63
1 8
2 7
54
S1
59.0kR12 249kR13 976kR15
GND
LDO_3V3
TP2
TP3
TP4
TP5
2 3
S4B
1 4
S4A
LDO_1V5
LDO_1V5
330pFC1330pF
C2
330pF
C7
330pF
C6
499k
R11
40.2k
R16
499k
R20
40.2k
R28
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0 1 0 0 5
1 0 0 0 6
1 1 0 0 7
Setup
Table 4-1. S1 and S2: ADCIN1 and ADCIN2 Switch Settings (continued)
ADCINx Switch Settings
Figure 4-2. ADCIN1 and ADCIN2 Configuration Schematic

4.1.4 J2: Barrel Jack Power Connector

The barrel jack power connector accepts a 19-V to 20-V DC supply. A standard notebook adapter (or similar adapter) provides the required power. This input provides the PP_EXT power rail 19-V to 20-V.
Figure 4-3. Barrel Jack (J2) Schematic

4.1.5 USB Type-C™ Connector (J3_PA, J3_PB)

The TPS65994 EVM has two full feature USB Type-C receptacles (port A/B) and routes VBUS, SSTX and SSRX pairs, SBU1 and SBU2 pairs, and D+ and D– signals. The TPS65994 device can be used in self-powered and bus-powered configurations for added flexibility. When self-powered, the EVM can provide up to 15 W (5 V, at 3 A) of power per port via the internal PP5V power path. The EVM is also capable of sinking 100 W (20 V, at 5 A) of power via the external PP_EXT power path. The internal power path is used for sourcing power and the external power path is used for sinking power.
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Figure 4-4. USB Type-C™ Receptacle (J3_PA) Schematic
Figure 4-5. USB Type-C™ Receptacle (J3_PB) Schematic

4.1.6 USB Micro B Connector (J6)

J6, the micro-B receptacle connects the Tiva to the PC for the TPS65994 Customization GUI. Use a standard USB micro-B to Type-A cable to make this connection. LED D24 turns on when VBUS is present on the Tiva board.
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Setup
Figure 4-6. USB Micro-B Receptacle (J6) Schematic

4.1.7 TP8 (5V), J10 (3.3V), TP7 (SYS_PWR)

Use the TP8, and J10 test points to measure the output voltage of the onboard DC/DC converters. These DC/DC converters produce the required voltage rails for full functionality of the EVM including power delivery, powering internal and external circuits, and so forth. These test points allow the user to verify the system supplies on the TPS65994EVM. LDO_1V5 is internally generated for internal circuitry. Use P3V3 to supply VIN_3V3 which then supplies LDO_3V3. Also, use LDO_3V3 as a low power output for external flash memory. In bus-powered conditions, or self-powered conditions, LDO_3V3 is active. TP7 test point is provided to verify input voltage of barrel jack connector.

4.1.8 Aardvark Connector (J9)

This connector matches the Total Phase® Aardvark that allows the user to access the I2C pins on the TPS65994EVM using the I2C Master capabilities. U6 is used to swap between I2C1 or I2C3 connected to the aardvark connector. S3 is used to control which way the 2 to 1 MUX will be set. If S3 is disabled, by default, I2C1 would be connected to the Aardvark header. When S3 is enabled, I2C3 would be connected to the Aardvark header.
Figure 4-7. Aardvark Connector (J9) Schematic
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4.1.9 TP10, TP11, TP12, TP13: GND Test Points

TP10, TP11, TP12, TP13 GND test points are provided for attaching an oscilloscope or multimeter, as well as for load testing. These test points are connected to the board GND planes through multiple vias.

4.1.10 TP2, TP3, TP4, TP5: CC1 and CC2 Test Points

Test points CC1 and CC2 are used to tie a PD protocol analyzer for PD BMC data or to verify the BMC signal integrity with an oscilloscope (depending on the cable orientation). Use a multimeter or oscilloscope to measure VCONN when an electronically marked USB Type-C cable is connected. Use these test points to attach an external load on VCONN.

4.1.11 TP1, TP6: VBUS Test Points

The VBUS test points are used to measure VBUS at each USB Type-C port A/B connector. With PD power possibly going up to 20 V, use caution when connecting and disconnecting probes on the TPS65994EVM. The VBUS test point is capable of drawing up to 3 A for an external load. Note that a PD power contract with the necessary capability must be negotiated in order to draw current from the VBUS test point.

4.1.12 J4 and J5 (Bottom of EVM): Signal Headers

These headers allow the user to probe many different signals on the TPS65994EVM. Note that some of the header pins are not connected unless a 0-Ω option resistor is placed.
Figure 4-8. Debug Header (J4) Schematic
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Setup
Figure 4-9. Debug Header (J5) Schematic

4.2 LED Indicators Description

The EVM has multiple LEDs to notify the user what type of connection is present. The LEDs are separated into 2 groups: MUX control LEDS and Status LEDs. All LEDs are enabled with general purpose I/O (GPIO); therefore, each must be enabled separately via configuration, if configuring a custom image

4.2.1 MUX Control LEDs

Table 4-2. Port A MUX CTL LED
LED Indicator GPIO Function
D15 - PA_HPD GPIO1 HPD
D17 - PA_USB3 GPIO3 USB 3.0 Event
D18 - PA_DP_Mode GPIO4 DP Mode Select Event
D23 - PA_POL GPIO9 Cable Orientation Event
Table 4-3. Port B MUX CTL LED
LED Indicator GPIO Function
D14 - PB_HPD GPIO0 HPD
D19 - PB_USB3 GPIO5 USB 3.0 Event
D22 - PB_DP_Mode GPIO8 DP Mode Select Event
D16 - PB_POL GPIO2 Cable Orientation Event

4.2.2 Status LEDs

D1 and D2 LEDs indicate when VBUS voltage is present on port A and port B respectively. They also provide a voltage discharge path for high to low PD contracts. D4 LED indicates SYS_PWR, when a barrel jack is connected at J2.
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Tiva USB to I2C Bridge Support Integration
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5 Tiva USB to I2C Bridge Support Integration

The Tiva microcontroller allows for a reliable USB to I2C connection. This section covers how to flash application firmware to EEPROM using the Tiva microcontroller and how to enter the debug mode using the Tiva microcontroller.

5.1 Flash Application Firmware to EEPROM

This section provides the steps to flash the application firmware to EEPROM.
1. Open the Application Customization Tool and Start a New Project
Figure 5-1. Application Customization Tool
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Tiva USB to I2C Bridge Support Integration
2. Create a project by modifying the registers according to your needs. For example, I/O Config (register 0x5c) allows for user-defined GPIOs.
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Figure 5-2. I/O Config Register
TPS65994 EVM User Guide 11
Tiva USB to I2C Bridge Support Integration
3. After defining the registers, use the Device tab and flash app firmware to EEPROM to load the new configurations to the device. Ensure that the correct adapter is selected. For this case, select the Tiva adapter.
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Figure 5-3. Flash Project to EEPROM (I2C)
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Tiva USB to I2C Bridge Support Integration

5.2 Entering Debug Mode

This section provides the steps for using Debug mode.
1. Ensure the USB to I2C/SPI adapter is selected accordingly with the device being used. In this case select the Tiva adapter. Sweep I2C address range to discover the port addresses.
Figure 5-4. USB to I2C/SPI Adapter Settings
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Tiva USB to I2C Bridge Support Integration
2. I2C address sweep results.
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Figure 5-5. I2C Addresses
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Tiva USB to I2C Bridge Support Integration
3. Once on debug mode, ensure that I2C_ADDR is within the required range for the addresses.
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Figure 5-6. Addressing range
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Tiva USB to I2C Bridge Support Integration
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4. Ensure that the registers are defined as expected by navigating through the Configuration Registers tab. The Debug Registers tab provides the run-time information on the registers. Finally, the Commands tab allows for the execution of defined commands in run-time. The following example shows the Transmit Source Capabilities (register 0x32) information.
Figure 5-7. Transmit Source Capabilities
For more information about how to use the Application Customization Tool, refer to the GUI user's guide.
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Using the TPS65994EVM

6 Using the TPS65994EVM

This section discusses the pre-loaded or recovery firmware, getting started, and debugging the EVM.

6.1 Powering the TPS65994EVM

The main power supply for the EVM is the barrel jack (J2), which accepts 19 V to 20 V via a barrel jack adapter. The EVM can also be powered with an external power supply on SYS_PWR (TP7). The input voltage can range from 5 V to 20 V, but the appropriate power profile for PP_EXT should be configured in the firmware using the configuration tool. The EVM can also be bus-powered from the USB Type-C connector and accepts 5 V to 20 V on VBUS, depending on the sink configuration.

6.2 Firmware Configurations

Out of the box, the TPS65994EVM is configured to emulate a dual-port laptop computer. For each port, the internal power switch is configured for sourcing, and the external high current power switch is configured for sinking. Both ports are configured for data DFP.
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Connecting the EVM
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7 Connecting the EVM

7.1 Connecting to Various Devices

Various USB Type-C cables can be used to connect the EVM to a legacy Type-A device, legacy Type-A host, or USB Type-C device or host.

7.1.1 Connecting to a Legacy Type-A Device

Using a USB Type-C to Type-A cable allows for connection to a legacy USB device, such as a flash-drive. The TPS65994 can act as a host passing the DP or USB connection by using the SS MUX and USB HUB present on the DP-Expansion board.. Figure Below shows how the notebook, DP and USB receptacle, TPS65988EVM, cable, and flash drive are connected.

7.1.2 Connecting to USB Type-C™ Devices

Using a USB Type-C cable allows for connection to USB and DP devices. When a TPS65994EVM is used with a TPS6598x-EVM as DP source and sink boards respectively, a complete USB Type-C system can be verified. The test setup requires a DP and USB source to provide data to the sink board, and a DP-Expansion board. A DP monitor and USB device can now be connected to the sink board. Note that USB and DisplayPort video quality may degrade due to the use of multiple connectors and cables. Figure Below highlights this feature.

7.1.3 Testing DisplayPort Alternate Mode and USB 2.0 and USB 3.0

The DisplayPort alternate mode can be tested with a non-USB Type-C notebook, allowing the user to simulate a DisplayPort DFP_D (video source) or UFP_D (video sink).
7.1.3.1 Required Hardware
The following hardware is required to test the DP alternate mode and USB 3.0:
• A Microsoft® Windows® PC with a USB Type-A receptacle and DisplayPort video output – USB 2.0 or USB 3.0 Type-A to Type-B cable – USB 2.0 or USB 3.0, or USB Type-C flash drive – USB 2.0 Type-A to micro USB cable
• USB Type-C cable
• Monitor with DisplayPort Input
• Mini DisplayPort to DisplayPort cable or USB Type-C to DisplayPort cable
• FTDI board (used for programming the TPS695994EVM and interfacing with configuration tool)
• Dell laptop power supply (model # 492-BBGP)
Use the TPS65994EVM with a DP-Expansion board to test DP alternate mode as well as USB data using the default firmware. To do so, connect a DP source from a laptop to the TPS65994EVM through the DP-Expansion Board. Next, connect a USB Type-B to USB Type-A cable from the TPS65994EVM to a Windows computer. To test DP, connect a mini-DP to DP cable to a monitor from the DP-Expansion board, and a USB Type-C to USB Type-C cable from laptop to TPS65994EVM. To test USB functionality, either connect a USB Type-C flash drive to the other USB Type-C port on the TPS65994EVM or plug in a Type-A flash drive on the DP-EXPANSION­EVM. The monitor displays what is present from the DP source. The flash drive enumerates on the windows PC. Table 7 explains this test setup.
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