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STM32F302XD bảng dữ liệu(PDF) 118 Page - STMicroelectronics

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STM32F302XD bảng dữ liệu(HTML) 118 Page - STMicroelectronics

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Electrical characteristics
STM32F302xD STM32F302xE
118/168
DocID026900 Rev 4
Figure 40. I/O AC characteristics definition
1. See Table 68: 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 66).
Unless otherwise specified, the parameters given in Table 69 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 19.
Table 69. 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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