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STM32L072X8 bảng dữ liệu(PDF) 97 Page - STMicroelectronics

tên linh kiện STM32L072X8
Giải thích chi tiết về linh kiện  Ultra-low-power 32-bit MCU ARM-based Cortex-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs
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STM32L072X8 bảng dữ liệu(HTML) 97 Page - STMicroelectronics

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STM32L072xx
Electrical characteristics
117
Figure 28. I/O AC characteristics definition
6.3.14
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU , 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 VDD supply voltage conditions summarized in
Table 26.
Table 63. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max Unit
VIL(NRST)(1)
1. Guaranteed by design.
NRST input low level voltage
-
VSS
-0.8
V
VIH(NRST)(1) NRST input high level voltage
-
1.4
-
VDD
VOL(NRST)(1)
NRST output low level
voltage
IOL = 2 mA
2.7 V < VDD < 3.6 V
--
0.4
IOL = 1.5 mA
1.65 V < VDD < 2.7 V
--
Vhys(NRST)(1)
NRST Schmitt trigger voltage
hysteresis
--
10%VDD(2)
2. 200 mV minimum value
-mV
RPU
Weak pull-up equivalent
resistor(3)
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%.
VIN VSS
30
45
60
k
VF(NRST)(1) NRST input filtered pulse
-
-
-
50
ns
VNF(NRST)(1) NRST input not filtered pulse
-
350
-
-
ns



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