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CapTIvate™ Touch Getting Started Manual
27
Copyright © 2021, Texas Instruments Incorporated
Figure 5-9 MCU widget interface
Table 5-3 Parameters to be set in the MCU widget
Box in
picture
Operation
directory
Operation content
Recommended
value
Comment
No. 1
Device
Select the corresponding
device and package.
None
Operating
Condition
Choose the actual working
temperature.
25C
Temperature will affect the noise of the
device and affect the Threshold
Percentage in the sensor widget.
No. 2
Wake on
Proximity Sensor
If there is a need for ultra-
low power consumption,
choose a Sensor that is used
as a proximity wake-up
sensor.
Can be
unenabled
Low Power Mode
Choose the corresponding
low-power mode according
to your needs.
Can use default
configuration
PM3 has lower power consumption
than LPM0, but it cannot actively
receive UART data at this time, and can
only send data.
Force LPM4 in
Wake-on-Prox
Mode
When enabled, the MCU
consumes less power in
Wake-on-Prox mode.
Can be
unenabled
After enabling, the timing clock source
is VLO clock, the timing error is
relatively large.
No. 3
Communication
Interface
Choose UART or BUCK_I2C
to communicate with GUI
according to actual design.
None
Please refer to
manual for the communication pins
and IRQ PIN used.
No. 4
Configure
Connections
According to the actual
button design, map the
virtual Tx and Rx pins to the
CAP IO.
C
an click “
Auto-
Assign
”
In addition to the button and proximity
sensor function, it is recommended to
select the Auto-Assign function.
No. 5
Scan Time
Estimate
Automatically calculate the
total scanning time of the
button in Active mode.
None
Used to evaluate the shortest "Active
Mode Scan Rate ms".
No. 8
Active Mode Scan
Rate ms
Set the scan time interval of
the sensor in active mode
according to requirements.
Can use default
configuration
Wake on Prox
Mode Scan Rate
ms
Set the scan time interval of
the proximity sensor in
Wake-on-Prox mode.
Can use default
configuration
The shorter the time, the faster the
scanning speed close to wake-up, but
the higher the power consumption.
