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STM32F303X6 bảng dữ liệu(PDF) 82 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Arm® Cortex®-M4 32b MCUFPU, up to 64KB Flash, 16KB SRAM, 2 ADCs, 3 DACs, 3 comp., op-amp 2.0 - 3.6 V
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STM32F303X6 bảng dữ liệu(HTML) 82 Page - STMicroelectronics

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Electrical characteristics
STM32F303x6/x8
82/124
DS9866 Rev 8
Figure 24. 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 51).
Unless otherwise specified, the parameters given in Table 54 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 19.
ai14131d
10%
90%
50%
tr(IO)out
OUTPUT
EXTERNAL
ON CL
Maximum frequency is achieved if (tr + tf) ≤ (2/3)T and if the duty cycle is (45-55%)
when loaded by CL specified in the table “
I/O AC characteristics”.
10%
50%
90%
T
tf(IO)out
Table 54. 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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