User's Manual

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CC2650MOD
www.ti.com SWRS187 –AUGUST 2016
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Detailed DescriptionCopyright © 2016, Texas Instruments Incorporated
Timer 0 is a general-purpose timer module (GPTM), which provides two 16-bit timers. The GPTM can be
configured to operate as a single 32-bit timer, dual 16-bit timers or as a PWM module.
Timer 1, Timer 2, and Timer 3 are also GPTMs. Each of these timers is functionally equivalent to Timer 0.
In addition to these four timers, the RF core has its own timer to handle timing for RF protocols; the RF
timer can be synchronized to the RTC.
The I
2
C interface is used to communicate with devices compatible with the I
2
C standard. The I
2
C interface
is capable of 100-kHz and 400-kHz operation, and can serve as both I
2
C master and I
2
C slave.
The TRNG module provides a true, nondeterministic noise source for the purpose of generating keys,
initialization vectors (IVs), and other random number requirements. The TRNG is built on 24 ring
oscillators that create unpredictable output to feed a complex nonlinear combinatorial circuit.
The watchdog timer is used to regain control if the system fails due to a software error after an external
device fails to respond as expected. The watchdog timer can generate an interrupt or a reset when a
predefined time-out value is reached.
The device includes a direct memory access (µDMA) controller. The µDMA controller provides a way to
offload data transfer tasks from the CM3 CPU, allowing for more efficient use of the processor and the
available bus bandwidth. The µDMA controller can perform transfer between memory and peripherals. The
µDMA controller has dedicated channels for each supported on-chip module and can be programmed to
automatically perform transfers between peripherals and memory as the peripheral is ready to transfer
more data. Some features of the µDMA controller include the following (this is not an exhaustive list):
• Highly flexible and configurable channel operation of up to 32 channels
• Transfer modes: memory-to-memory, memory-to-peripheral, peripheral-to-memory, and peripheral-to-
peripheral
• Data sizes of 8, 16, and 32 bits
The AON domain contains circuitry that is always enabled, except for in Shutdown (where the digital
supply is off). This circuitry includes the following:
• The RTC can be used to wake the device from any state where it is active. The RTC contains three
compare and one capture registers. With software support, the RTC can be used for clock and
calendar operation. The RTC is clocked from the 32-kHz RC oscillator or crystal. The RTC can also be
compensated to tick at the correct frequency even when the internal 32-kHz RC oscillator is used
instead of a crystal.
• The battery monitor and temperature sensor are accessible by software and give a battery status
indication as well as a coarse temperature measure.