CC2640R2FYFVT.B datasheet(41/74 Pages) TI2

41 / 74 page

The UART implements a universal asynchronous receiver/transmitter function. It supports flexible baud-rate

generation up to a maximum of 3 Mbps .

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 I2C interface is used to communicate with devices compatible with the I2C standard. The I2C interface is

capable of 100-kHz and 400-kHz operation, and can serve as both I2C master and I2C 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

– 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.

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CC2640R2F

SWRS204C – DECEMBER 2016 – REVISED SEPTEMBER 2020

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