Datasheet

DS10969 Rev 5 139/204
STM32L475xx Electrical characteristics
190
Figure 22. Recommended NRST pin protection
1. The reset network protects the device against parasitic resets.
2. The user must ensure that the level on the NRST pin can go below the V
IL(NRST)
max level specified in
Table 63: NRST pin characteristics. Otherwise the reset will not be taken into account by the device.
3. The external capacitor on NRST must be placed as close as possible to the device.
6.3.16 Extended interrupt and event controller input (EXTI) characteristics
The pulse on the interrupt input must have a minimal length in order to guarantee that it is
detected by the event controller.
6.3.17 Analog switches booster
MS19878V3
R
PU
V
DD
Internal reset
External
reset circuit
(1)
NRST
(2)
Filter
0.1 μF
Table 64. EXTI input characteristics
(1)
1. Guaranteed by design.
Symbol Parameter Conditions Min Typ Max Unit
PLEC
Pulse length to event
controller
-20--ns
Table 65. Analog switches booster characteristics
(1)
1. Guaranteed by design.
Symbol Parameter Min Typ Max Unit
V
DD
Supply voltage 1.62 - 3.6 V
t
SU(BOOST)
Booster startup time - - 240 µs
I
DD(BOOST)
Booster consumption for
1.62 V
 V
DD
 2.0 V
--250
µA
Booster consumption for
2.0 V
 V
DD
 2.7 V
--500
Booster consumption for
2.7 V
 V
DD
 3.6 V
--900
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