Power Supplies And Reset Sources; Power Supplies; Table 1. Power Supplies Of Stm32C0 Series - ST STM32C0 Series Getting Started

1

Power supplies and reset sources

This section describes the power supply schemes and the reset and power supply supervisor on
Series devices, based on an Arm
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
1.1

Power supplies

The STM32C0 series devices require a 2.0 to 3.6 V operating supply voltage (V
supplies are provided to specific peripherals:
• V = 2.0 to 3.6 V
DD
V is the external power supply for the internal regulator and the system analog such as reset, power
DD
management and internal clocks. It is provided externally through the VDD pin.
Note that the power-on reset happens when the V
that this value is below 2 V (V
functionality is guaranteed down to the power-down reset threshold V
• V = 2.0 to 3.6 V
DDA
V is the analog power supply for the A/D converter. Its voltage level is identical to the V
DDA
it is provided externally through VDD pin (V
packages proposed for the STM32C0 series).
• V = V
DDIO
V is the power supply for the I/Os. Its voltage level is identical to V
DDIO
externally through VDD pin (V
proposed for the STM32C0 series).
• V is the input reference voltage for the ADC. Its voltage level is identical to the V
REF+
provided externally through VDD pin (V
packages proposed for STM32C0 series). Package with separate V
and V
DDA
package.
• V
CORE
An embedded linear voltage regulator is used to supply the V
for digital peripherals, SRAM, and flash memory. The flash memory is also supplied by V
Power supply
V
DD
V
REF+
1. This is only true for the packages where a dedicated V
shorted and correspond to the same voltage.
AN5673 - Rev 2
®
core.
recommended minimum value). Once this threshold is crossed, the
DD
DD
and V
DD
or can be grounded when the ADC is not active. V
Table 1. Power supplies of STM32C0 series
2.0 to 3.6 V
V must be between 2 V and V
REF+
= 1.94 V threshold is crossed by V
POR(max)
and V are shorted due to the low number of pins on the
DD DDA
are shorted due to the low number of pins on the packages
DDIO
and V are shorted due to the low number of pins on the
DD DDIO
is bonded to V
REF-
internal digital power, the power supply
CORE
STM32C0 series
(1)
DDA
pin is present. In the other cases, V
REF+
Power supplies and reset sources
STM32C0
). Several different power
DD
DD
= 1.92 V.
PDR(min)
voltage, as
DD
voltage as it is provided
DD
voltage as it is
DD
pin, V must be between 2 V
REF+ REF+
and V , whatever the
SS SSA
.
DD
, V and V
DD DDA REF+
AN5673
and
are
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