User manual

Clock mux
SCLK_LF
SCLK_HF
SCLK_LF_AUX
ACLK_ADC
ACLK_REF
ACLK_TDC
HF XTAL
oscillator
LF XTAL
oscillator
HF RC
oscillator
LF RC
oscillator
24 MHz
32.768 kHz
AON
I/O controller
External
32 kHz
48 MHz
32.768 kHz
48 MHz
32 kHz
32 kHz
/ 768
x 2
24 MHz
32.25 kHz
/ 2
24 MHz
www.ti.com Introduction
6.1.3.1 MCU_VD
The MCU voltage domain contains the CPU system divided into multiple power domains, as shown in
Figure 6-3. MCU_VD also includes always-on logic not encapsulated in a power domain, but is powered
whenever MCU_VD is powered. This in Figure 6-3 shows this logic as MCU_AON.
MCU_VD is powered up by any enabled wake-up source.
Requirements to power off MCU_VD is found in register description of [PRCM:VDCTL.MCU_VD].
6.1.3.1.1 MCU_VD Power Domains
Figure 6-2shows control of MCU_VD power domains and provides descriptions of the registers referred to
in the figure.
6.1.3.2 AON_VD
AON_VD contains two power domains and always-on logic marked AON in Figure 6-3.
Logic in AON is always powered when the CC26xx device is not in Shutdown mode.
6.1.3.2.1 AON_VD Power Domains
Figure 6-2 shows control of AON_VD power domains and provides descriptions of the registers referred to
in the figure.
6.1.4 Clock Management
6.1.4.1 System Clocks
The CC26xx device has a flexible clock mux where system clocks can be derived from several sources as
shown in Figure 6-4 and Table 6-4.
Figure 6-4. Clock Sources
417
SWCU117A–February 2015–Revised March 2015 Power, Reset, and Clock Management
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