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STM32F031X4 датащи(PDF) 69 Page - STMicroelectronics

номер детали STM32F031X4
подробное описание детали  ARM®-based 32-bit MCU with up to 32 Kbyte Flash, 9 timers, ADC and communication interfaces, 2.0 - 3.6 V
PDF  106 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
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STM32F031X4 датащи(HTML) 69 Page - STMicroelectronics

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STM32F031x4 STM32F031x6
Electrical characteristics
80
Figure 22. I/O AC characteristics definition
6.3.15
NRST pin characteristics
The NRST pin input driver uses the CMOS technology. It is connected to a permanent pull-
up resistor, RPU.
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature and supply voltage conditions summarized in
Table 18: General operating conditions.
Table 49. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST) NRST input low level voltage
-
-
-
0.3 VDD+0.07(1)
V
VIH(NRST) NRST input high level voltage
-
0.445 VDD+0.398(1)
--
Vhys(NRST)
NRST Schmitt trigger voltage
hysteresis
--
200
-
mV
RPU
Weak pull-up equivalent
resistor(2)
VIN = VSS
25
40
55
kΩ
VF(NRST) NRST input filtered pulse
-
-
-
100(1)
ns
VNF(NRST) NRST input not filtered pulse
2.7 < VDD < 3.6
300(3)
--
ns
2.0 < VDD < 3.6
500(3)
--
1. Data based on design simulation only. Not tested in production.
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series
resistance is minimal (~10% order).
3. Data based on design simulation only. Not tested in production.



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