Texas Instruments CC2650DK Benutzerhandbuch
DC/DC Converter
Global LDO
Digital LDO
Micro LDO
POR / BOD / Misc
IOs
RF LDOs
Oscillators
AON_VD
MCU_VD
VDDS
VDDS_DCDC
IOs
VDDS2
IOs
VDDR
VDDR_RF
DCDC_SW
VDD
DCOUPL
VDDS3
Functional Overview
Figure 1-2. CC26xx Supply System
1.3.13.1.1 VDDS
The battery voltage on the CC26xx family is called VDDS (supply). This supply has the highest potential in
the system and typically is the only one provided by the user.
the system and typically is the only one provided by the user.
The two VDDS segments, VDDS2 and VDDS3, provide split-rail I/O support for the device and can be
driven by a voltage other than VDDS. This allows a reduction in external components by removing the
need for level shifters to interface other devices running on logic levels different from VDDS.
driven by a voltage other than VDDS. This allows a reduction in external components by removing the
need for level shifters to interface other devices running on logic levels different from VDDS.
See
I/O Control, for the DIOs that are powered by each VDDSx supply. See the data sheet for
electrical specifications for VDDSx.
1.3.13.1.2 VDDR
The two VDDR (regulated) pins must be powered from a 1.65-V to 1.95-V supply. This supply is typically
the internal DC-DC regulator. The VDDR pins can also be supplied by the global LDO that is internally
connected to VDDR.
the internal DC-DC regulator. The VDDR pins can also be supplied by the global LDO that is internally
connected to VDDR.
If the internal DC-DC regulator is used (recommended for lowest power consumption), the output pin of
the regulator must be connected externally to the two VDDR pins. See the reference designs and
the regulator must be connected externally to the two VDDR pins. See the reference designs and
, DC-DC Converter, for further details.
26
Architectural Overview
SWCU117A – February 2015 – Revised March 2015
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