Header Settings
3
SLLU252 – September 2016
Copyright © 2016, Texas Instruments Incorporated
TUSB422 EVM Quick Start Guide
4
Header Settings
There are several headers provided for the EVM and device configuration purposes. Refer to the board
schematics in the datasheet (
) for details.
Table 2. Headers With SHUNT Configuration Options
Reference
Designator
Header Control
Function
Default SHUNT
Setting
Description
J7
BOOST5V
OPEN
When SHUNT is placed, 5 V is supplied to the board by the
LaunchPAD instead of the on-board regulator. Remove the SHUNT
on J10 if a SHUNT is to be placed on J7.
J4
BOOST3P3V
OPEN
When SHUNT is placed, 3P3V is supplied to the board by the
LaunchPAD instead of the on-board regulator. Remove the SHUNT
on J10 if a SHUNT is to be placed on J4.
J9
VCONN
SHUNT ON 1-2
Connects VCONN output:
SHUNT ON 1–2: VCONN connected
SHUNT OFF: VCONN disconnected
J10
5V_VIN
SHUNT ON 1-2
Connects 5-V source:
SHUNT ON 1–2: 5-V Source Connected
SHUNT OFF: 5-V source disconnected
J11
IO Pull-up Selection
SHUNT ON 1-2
Configures TUSB422 pull-up voltage to 3P3V vs. 1P8V:
SHUNT ON 1-2: Pull-up voltage = 3P3V
SHUNT ON 2-3: Pull-up voltage = 1P8V
J14
HV VBUS Source
Selection
SHUNT ON 2-3
Configures high voltage VBUS source:
SHUNT ON 1-2: VBUS source = 15 V
SHUNT ON 2-3: VBUS source = 9 V
Table 3. Other Headers and Test Loops
Reference
Designator
Header Function
Description
J15
CC1 and CC2 Probe
CC1 and CC2 probe and debug
J5 and J6
LaunchPAD headers
LaunchPAD connection
J13
5 V/VBATT input
5 V/VBATT external input. On-board 5-V input must be disconnected (remove J10
or SW1 in OFF position (position 2)).
J16
SBU1/SBU2
SBU1/SBU2 probe and debug
J2
Test header
Various signal probe and debug. See schematics for details
LP4
USB Type-C connector
VBUS
Connects to USB Type-C connector VBUS for measurement and debug purposes.
LP6
TUSB422 VBUS
Connects to TUSB422 VBUS input. Use the test loop to supply VBUS externally.
Make sure there is no other source driving TUSB422 VBUS.
LP1
TUSB422 VDD
Connects to TUSB422 VDD. Remove R5 if external power supply is to be
connected to LP1 for current measurement purposes.
LP2
VDD
Test loop for measuring VDD input. If an external power supply is to be used, an
on-board VDD source
must
be removed. When R5 is removed, the device current
can be measured through LP2 and LP1.
LP7
VBUS power out
When the EVM and TUSB422 is in VBUS SINK operation, VBUS output can be
measured via LP7.
LP1 and LP8
GND
GND probe and debug purposes.
Do not connect to power source.