Jumper Settings For Launchpad™ Power - Texas Instruments SimpleLink Wi-Fi LaunchPad CC3235 Series User Manual

Hardware Description
2.4.3 Power Connections
The board can be powered by using the onboard micro USB connector. An onboard DC-DC converter
provides 3.3 V for the CC3235 device and the rest of the board to operate. This supply can be isolated
from the DC-DC converter using the jumpers on the board. See the yellow jumpers in
VBRD are both attached to 3V3, but are routed to different devices to allow for power measurements.
VBAT is routed only to critical parts of the LaunchPad™ that are required for operation. This allows for
proper measurements of our devices power consumption. VBRD is routed to other devices, like the LEDs,
2
I C devices, and BoosterPack™ header by default.
Table 4 lists the jumper settings for the LaunchPad™ power.
Reference
J18
J28
J23
J24
J21
J22
12
CC3235x SimpleLink™ Wi-Fi
CC3235x)
Figure 7. Power Jumpers J28, J23, J24, J18, J21, and J22
Table 4. Jumper Settings for LaunchPad™ Power
Use
OPAMP EN
GND
5V
VBAT current
measurement
BRD power
VCC_BUFFER
®
LaunchPad™ Development Kit (LAUNCHXL-
Copyright © 2019, Texas Instruments Incorporated
Comments
If uninstalled, the power supply to the operational amplifier (OPAMP) is
cut off. This can be used to enable low-power measurements.
Ground reference
Connects+5 VDC from emulator section to the rest of the board.
Used to measure the current flowing into the CC3235 device. Also
includes the serial flash.
Supplies the board power from the onboard DC/DC converter. The
board power is used for the sensors, LED, and the OPAMP used to
drive the ADC input.
Used to power the level shifters on the emulator side of the board. The
level shifters can be powered by shorting this jumper. Removing this
jumper enables low-current measurement.
www.ti.com
Figure 7. VBAT and
SWRU539 – January 2019
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