Pwr; Table 15. Pwr Differences Between Stm32L1 Series And Stm32L4 Series - ST STM32L1 Series Application Note

Peripheral migration
4.6

PWR

In STM32L4 Series the PWR controller presents some differences versus STM32L1 Series,
these differences are summarized in

Table 15. PWR differences between STM32L1 Series and STM32L4 Series

PWR
V = 1.8 V (at power on) or 1.65 V (at power down) to
DD
3.6 V when the BOR is available. V
3.6 V, when BOR is not available.
V is the external power supply for I/Os and internal
DD
regulator. It is provided externally through V
V = 1.2 to 1.8 V
CORE
V is the power supply for digital peripherals,
CORE
SRAM and Flash memory. It is generated by a internal
voltage regulator. Three V
by software depending on V
V and V
DD
V , V
SSA
down) to 3.6 V, when BOR is available and V
Power
V = 1.65 to 3.6 V, when BOR is not available.
supplies
DDA
V is the external analog power supply for ADC,
DDA
DAC, reset blocks, RC oscillators and PLL. The
minimum voltage to be applied to V
the ADC is used.
V and V
DDA
respectively.
V = 2.5 to 3.6 V
LCD
The LCD controller can be powered either externally
through the VLCD pin, or internally from an internal
voltage generated by the embedded step-up converter.
34/58
STM32L1 Series
ranges can be selected
CORE
and target frequency.
DD
NA
must be at the same voltage value.
DDA
= 1.8 V (at power on) or 1.65 V (at power
DDA
must be connected to V
SSA
NA
NA
Table 15.
= 1.65 V to
DD
pins.
DD
,
SSA
is 1.8 V when
DDA
and V
DD SS
DocID027094 Rev 3
STM32L4 Series
V = 1.71 to 3.6 V: external power supply
DD
for I/Os, and internal regulator. It is
provided externally through V
V = 1.0 to 1.2 V
CORE
V is the power supply for digital
CORE
peripherals, SRAM and Flash memory. It is
generated by a internal voltage regulator.
Two V ranges can be selected by
CORE
software depending on target frequency.
V = 1.55 to 3.6 V: power supply for
BAT
RTC, external clock 32 kHz oscillator and
backup registers (through power switch)
when V is not present.
DD
Independent power supplies (V
V , V ) allow to improve power
DDUSB DDIO2
consumption by running MCU at lower
supply voltage than analog and USB.
V , V =
SSA DDA
1.62 V (ADCs/COMPs) to 3.6 V
1.8 V (DACs/OPAMPs) to 3.6 V
2.4 V (VREFBUF) to 3.6 V
V is the external analog power supply
DDA
for A/D and D/A converters, voltage
reference buffer, operational amplifiers
and comparators. The V
is independent from the V
V = 2.5 to 3.6 V (idem STM32L1
LCD
Series)
V = 3.0 to 3.6 V
DDUSB
V is the external independent power
DDUSB
supply for USB transceivers. The V
voltage level is independent from the V
voltage.
V = 1.08 V to 3.6 V
DDIO2
V is the external power supply for 14
DDIO2
I/Os (PG[15:2]). The V
DDIO2
is independent from the V
applicable for Cat. 4 devices).
AN4612
pins.
DD
,
DDA
voltage level
DDA
voltage.
DD
DDUSB
DD
voltage level
voltage (not
DD