CC1350_16 Datasheet, PDF (39/61 Pages) Texas Instruments – SimpleLink Ultra-Low-Power Dual-Band Wireless MCU

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CC1350
SWRS183A – JUNE 2016 – REVISED NOVEMBER 2016
6.4 Sensor Controller
The Sensor Controller contains circuitry that can be selectively enabled in standby mode. The peripherals
in this domain may be controlled by the Sensor Controller Engine, which is a proprietary power-optimized
CPU. This CPU can read and monitor sensors or perform other tasks autonomously; thereby significantly
reducing power consumption and offloading the main CM3 CPU.
A PC-based development tool called Sensor Controller Studio is used to write, test, and debug code for
the Sensor Controller. The tool produces C driver source code, which the System CPU application uses to
control and exchange data with the Sensor Controller. Typical use cases may be (but are not limited to)
the following:
• Analog sensors using integrated ADC
• Digital sensors using GPIOs with bit-banged I²C or SPI
• Capacitive sensing
• Waveform generation
• Pulse counting
• Key scan
• Quadrature decoder for polling rotational sensors
The peripherals in the Sensor Controller include the following:
• The low-power clocked comparator can be used to wake the device from any state in which the
comparator is active. A configurable internal reference can be used with the comparator. The output of
the comparator can also be used to trigger an interrupt or the ADC.
• Capacitive sensing functionality is implemented through the use of a constant current source, a time-
to-digital converter, and a comparator. The continuous time comparator in this block can also be used
as a higher-accuracy alternative to the low-power clocked comparator. The Sensor Controller takes
care of baseline tracking, hysteresis, filtering, and other related functions.
• The ADC is a 12-bit, 200-ksamples/s ADC with 8 inputs and a built-in voltage reference. The ADC can
be triggered by many different sources, including timers, I/O pins, software, the analog comparator,
and the RTC.
• The analog modules can be connected to up to eight different GPIOs (see Table 6-1).
The peripherals in the Sensor Controller can also be controlled from the main application processor.
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