Datasheet

DS10969 Rev 5 91/204
STM32L475xx Electrical characteristics
190
6.3.2 Operating conditions at power-up / power-down
The parameters given in Table 24 are derived from tests performed under the ambient
temperature condition summarized in Table 23.
The requirements for power-up/down sequence specified in Section 3.9.1: Power supply
schemes must be respected.
6.3.3 Embedded reset and power control block characteristics
The parameters given in Table 25 are derived from tests performed under the ambient
temperature conditions summarized in Table 23: General operating conditions.
4. If T
A
is lower, higher P
D
values are allowed as long as T
J
does not exceed T
Jmax
(see Section 7.3: Thermal characteristics).
5. In low-power dissipation state, T
A
can be extended to this range as long as T
J
does not exceed T
Jmax
(see Section 7.3:
Thermal characteristics).
Table 24. Operating conditions at power-up / power-down
Symbol Parameter Conditions Min Max Unit
t
VDD
V
DD
rise time rate
-
0 
µs/V
V
DD
fall time rate 10 
t
VDDA
V
DDA
rise time rate
-
0 
µs/V
V
DDA
fall time rate 10 
t
VDDUSB
V
DDUSB
rise time rate
-
0 
µs/V
V
DDUSB
fall time rate 10 
Table 25. Embedded reset and power control block characteristics
Symbol Parameter Conditions
(1)
Min Typ Max Unit
t
RSTTEMPO
(2)
Reset temporization after
BOR0 is detected
V
DD
rising - 250 400 s
V
BOR0
(2)
Brown-out reset threshold 0
Rising edge 1.62 1.66 1.7
V
Falling edge 1.6 1.64 1.69
V
BOR1
Brown-out reset threshold 1
Rising edge 2.06 2.1 2.14
V
Falling edge 1.96 2 2.04
V
BOR2
Brown-out reset threshold 2
Rising edge 2.26 2.31 2.35
V
Falling edge 2.16 2.20 2.24
V
BOR3
Brown-out reset threshold 3
Rising edge 2.56 2.61 2.66
V
Falling edge 2.47 2.52 2.57
V
BOR4
Brown-out reset threshold 4
Rising edge 2.85 2.90 2.95
V
Falling edge 2.76 2.81 2.86
V
PVD0
Programmable voltage
detector threshold 0
Rising edge 2.1 2.15 2.19
V
Falling edge 2 2.05 2.1
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