ST STM32G0 1 Series User Manual

Power control (PWR) RM0444
124/1390 RM0444 Rev 5
4.2 Power supply supervisor
4.2.1 Power-on reset (POR) / power-down reset (PDR) / brown-out reset
(BOR)
The device features an integrated power-on reset (POR) / power-down reset (PDR),
coupled with a brown-out reset (BOR) circuitry. The POR/PDR is active in all power modes.
The BOR can be enabled or disabled only through option bytes. It is not available in
Shutdown mode.
When the BOR is enabled, four BOR levels can be selected through option bytes, with
independent configuration for rising and falling thresholds. During power-on, the BOR keeps
the device under reset until the V
DD
supply voltage reaches the specified BOR rising
threshold (V
BORRx
). At this point, the device reset is released and the system can start.
During power-down, when V
DD
drops below the selected BOR falling threshold (V
BORFx
),
the device is put under reset again.
Warning: It is not allowed to configure BOR falling threshold (V
BORFx
)
to a value higher than BOR rising threshold (V
BORRx
).
Figure 6. POR, PDR, and BOR thresholds
1. The reset temporization t
RSTTEMPO
starts when V
DD
crosses V
POR
threshold, indifferently from the
configuration of the BOR Option bits.
MSv45389V4
V
DD
V
BORR4
V
BORF4
V
BORR3
V
BORF3
V
BORR2
V
BORF2
V
BORR1
V
BORF1
V
POR
V
PDR
t
t
RSTTEMPO
t
RSTTEMPO
Reset with BOR off
Reset with BOR on
(V
BORR4
V
BORF1
)
POR/BOR rising thresholds
PDR/BOR falling thresholds

ST STM32G0 1 Series Specifications

General

Brand	ST
Model	STM32G0 1 Series
Category	Microcontrollers
Language	English