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STM32F303CC bảng dữ liệu(PDF) 91 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  ARM®-based Cortex®-M4 32b MCUFPU, up to 256KB Flash 48KB SRAM, 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V
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STM32F303CC bảng dữ liệu(HTML) 91 Page - STMicroelectronics

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STM32F303xB STM32F303xC
Electrical characteristics
124
Figure 23. I/O AC characteristics definition
6.3.15
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 54).
Unless otherwise specified, the parameters given in Table 57 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 24.
Table 57. 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.
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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