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STM32F373C8 Datasheet(PDF) 89 Page - STMicroelectronics

No. de pieza STM32F373C8
Descripción Electrónicos  ARM Cortex-M4 32b MCUFPU, up to 256KB Flash32KB SRAM timers, 4 ADCs (12/16-bit), 3 DACs, 2 comp., 2.0-3.6 V operation
PDF  131 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F373C8 Datasheet(HTML) 89 Page - STMicroelectronics

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STM32F37xxx
Electrical characteristics
114
Figure 21. I/O AC characteristics definition
6.3.15
NRST characteristics
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 52).
Unless otherwise specified, the parameters given in Table 55 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 22.
MS32132V1
T
10%
50%
90%
10%
50%
90%
EXTERNAL
OUTPUT
ON 50 pF
Maximum frequency is achieved if (t + t (≤ 2/3)T and if the duty cycle is (45-55%)
when loaded by 50 pF
r
f
r(IO)out
t
f(IO)out
t
Table 55. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)(1) NRST Input low level voltage
-
-
0.3VDD + 0.07(1)
V
VIH(NRST)(1) NRST Input high level voltage
0.445VDD + 0.398(1)
--
Vhys(NRST)(1)
NRST Schmitt trigger voltage
hysteresis
-200
-
mV
RPU
Weak pull-up equivalent resistor(2)
VIN = VSS
25
40
55
k
Ω
VF(NRST)(1) NRST Input filtered pulse
-
-
100
ns
VNF(NRST)(1) NRST Input not filtered pulse
500
-
-
ns
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).



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