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6.1.2 Supply System
The supply system of the CC26xx and CC13xx devices is complex and controlled by hardware.
shows a simplified scheme with focus on parts that can be controlled by software. Registers that affect the
different voltage domains and power domains are highlighted in the figure. For example, register
PRCM:PDCTL0.SERIAL_ON controls the SERIAL power domain.
See
Figure 6-3
for more details about voltage and power domains.
VDDS
Global LDO
DC-DC converter
Modules in AON is always powered when CC26xx is
not in shutdown mode.
AUX_PD is powered on by
AON_WUC:AUXCTL.AUX_FORCE_ON = 1.
For power off see AUX section.
JTAG_PD is SW-controlled by
AON_WUC:JTAGCFG:JTAG_PD_FORCE_ON.
SWCU117C – February 2015 – Revised September 2015
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Figure 6-2. CC26xx and CC13xx Supply System
LDO selected by
PRCM:VDCTL.ULDO.
Digital LDO
VDDR
Micro LDO
AON_VD
AON
AUX_PD
JTAG_PD
Copyright © 2015, Texas Instruments Incorporated
VDD
MCU_VD is controlled by
AON_EVENT:MCUWUSEL.
MCU_VD
MCU_AON
BUS_PD
VIMS_PD
CPU_PD
RFCORE_PD
SERIAL_PD
PERIPH_PD
Power, Reset, and Clock Management
Introduction
Figure 6-2
Legend
Voltage regulators
Voltage domain
Power domain
AON_WUC:MCUCFG and
MCU_AON is powered whenever MCU_VD is powered.
BUS_PD is HW controlled to be powered whenever
CPU_PD is powered. May be powered when CPU_PD
is off on demand from RFCORE FW.
VIMS_PD is HW controlled to be powered whenever
CPU_PD is powered. Also powered when BUS_PD is
powered in combination with
PRCM:PDCTL1.VIMS_MODE = 1.
CPU_PD is powered on by an enabled system CPU
interrupt.
CPU_PD is powered down on completion of setting
system CPU in deep sleep mode in combination with
PRCM:PDCTL1.CPU_ON = 0.
RFCORE_PD is SW-controlled by
PRCM:PDCTL0.RFC_ON and
PRCM:PDCTL1.RFC_ON.
Both of these bits must be cleared to power down
RFCORE_PD.
SERIAL_PD is SW-controlled by
PRCM:PDCTL0.SERIAL_ON.
PERIPH_PD is SW-controlled by
PRCM:PDCTL0.PERIPH_ON.
415
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