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STM32F303VE bảng dữ liệu(PDF) 131 Page - STMicroelectronics

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STM32F303VE bảng dữ liệu(HTML) 131 Page - STMicroelectronics

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STM32F303xD STM32F303xE
Electrical characteristics
161
Figure 40. I/O AC characteristics definition
1. See Table 67: I/O AC characteristics.
6.3.16
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 65).
Unless otherwise specified, the parameters given in Table 68 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 19.
Table 68. 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) 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(1)
ns
VNF(NRST)(1) NRST Input not filtered pulse
-
500(1)
--
ns
1. Guaranteed by design, 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 must be minimum
(~10% order)
.



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