Table 7-1. DisplayPort
™
and USB Test Setup (continued)
Test Setup
Pass Criteria
Connect a type C
cable from DP and
USB can be
tested
simultaneously
with the
TPS65988EVM
setup to the right.
Observe
TPS65988EVM
LEDs.
LED Name
Event Mapping
Source x988
LED Status
MXCTL0
USB3
ON
MXCTL1
DP
ON
MXCTL2
POL
ON/OFF
HPD
X
ON
Variable DC/DC
X
A/B ON
Check for video
on DP monitor
and verify USB
flash drive
enumerates on
the PC.
Successfully copy and paste a file to and from the USB flash drive. Extend the PC to
the DP monitor and play video to verify video stream.
Verify the voltages
on the DP source
board.
Source Test Point
Test Point Name
Voltage
TP12
P1V2
1.2 V
TP8
P3V3
3.3 V
TP13
P5V
5 V
TP5
SYS_PWR
20 V
If video is displayed on the monitor, it is confirmed that DP alternate mode is entered. Similarly, if the USB flash
drive can be read by the attached PC, it is confirmed that USB data is functioning properly. USB 3.0 data can be
confirmed by observing LED MUX_CTRL0 in the high state.
Connecting the EVM
34
TPS65988 Evaluation Module
SLVUB62B – JUNE 2017 – REVISED NOVEMBER 2020
Copyright © 2020 Texas Instruments Incorporated
