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Clocking
8.0
Clocking
The SoC clocking is controlled by the Clock Control Unit (CCU). There are two primary
clocks: a System clock, and an RTC clock. The CCU uses the primary clocks to generate
secondary clocks to sub modules in the SoC. The secondary clocks are gated and scales
versions of the primary clocks.
The SoC contains a Real-Time Clock (RTC) with 32 bytes of battery-backed SRAM. The
SoC uses the RTC to keep track of time. The RTC operates from 1 Hz to 32.768 kHz. The
RTC supports alarm functionality that allows scheduling an Interrupt/Wake Event for a
future time. The RTC operates in all SoC power states. The RTC is powered from the
same battery supply as the rest of the SoC and does not have its own dedicated supply.
Figure 21. RTC
November 2016
Document Number: 333580-002EN
Intel® Quark™ Microcontroller D2000
Platform Design Guide
33
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