STM32L083X8 Datasheet, PDF (97/139 Pages) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, LCD, USB, ADC, DACs, AES

STM32L083xx
Electrical characteristics
Figure 26. I/O AC characteristics definition






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DLG
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, R_PU , except when it is internally driven low (see Table 63).
Unless otherwise specified, the parameters given in Table 63 are derived from tests
performed under ambient temperature and V_DD supply voltage conditions summarized in
Table 26.
Table 63. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max Unit
V_IL(NRST)(1) NRST input low level voltage
-
V_SS
-
0.8
V_IH(NRST)(1) NRST input high level voltage
-
1.4
-
V_DD
V_OL(NRST)(1)
NRST output low level
voltage
I_OL = 2 mA
2.7 V < V_DD < 3.6 V
-
I_OL = 1.5 mA
1.65 V < V_DD < 2.7 V
-
-
V
0.4
-
V_hys(NRST)(1)
NRST Schmitt trigger voltage
hysteresis
-
- 10%V_DD(2) - mV
R_PU
Weak pull-up equivalent
resistor⁽³⁾
V_IN V_SS
30
45
60 k
V_F(NRST)(1) NRST input filtered pulse
-
-
-
50 ns
V_NF(NRST)(1) NRST input not filtered pulse
-
350
-
- ns
1. Guaranteed by design.
2. 200 mV minimum value
3. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance is around 10%.
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