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-EXPANSION-
EVM. The monitor displays what is present from the DP source. The flash drive enumerates on the windows PC.
Table 7 explains this test setup.
Connecting the EVM
18
TPS65994 EVM User Guide
SLVUBM1C – JANUARY 2019 – REVISED JANUARY 2021
Copyright © 2021 Texas Instruments Incorporated