Peripheral Voltage Monitoring (Pvm); Table 18. Pvm Features; Figure 9. Pvd Thresholds - ST STM32L4x6 Reference Manual

Power control (PWR)
5.2.3

Peripheral Voltage Monitoring (PVM)

Only V
DD
functions. The other supplies (V
and can be monitored with four Peripheral Voltage Monitoring (PVM).
Each of the four PVMx (x=1, 2, 3, 4) is a comparator between a fixed threshold V
the selected power supply. PVMOx flags indicate if the independent power supply is higher
or lower than the PVMx threshold: PVMOx flag is cleared when the supply voltage is above
the PVMx threshold, and is set when the supply voltage is below the PVMx threshold.
Each PVM output is connected to an EXTI line and can generate an interrupt if enabled
through the EXTI registers. The PVMx output interrupt is generated when the independent
power supply drops below the PVMx threshold and/or when it rises above the PVMx
threshold, depending on EXTI line rising/falling edge configuration.
Each PVM can remain active in Stop 0, Stop 1 and Stop 2 modes, and the PVM interrupt
can wake up from the Stop mode.
The independent supplies (V
default, and a logical and electrical isolation is applied to ignore any information coming
from the peripherals supplied by these dedicated supplies.
•
If these supplies are shorted externally to V
available without enabling any Peripheral Voltage Monitoring.
• If these supplies are independent from V
140/1693
is monitored by default, as it is the only supply required for all system-related
PVM Power supply
PVM1
PVM2
PVM3
PVM4
DDA

Figure 9. PVD thresholds

, V and V
DDA DDIO2 DDUSB

Table 18. PVM features

PVM threshold
V V
DDUSB PVM1
V V
DDIO2 PVM2
V V
DDA PVM3
V V
DDA PVM4
, V and V
DDIO2 DDUSB
, the application should assume they are
DD
, the Peripheral Voltage Monitoring (PVM)
DD
DocID024597 Rev 3
) can be independent from V
(around 1.2 V)
(around 0.9 V)
(around 1.65 V)
(around 2.2 V)
) are not considered as present by
RM0351
DD
and
PVMx
EXTI line
35
36
37
38