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STM32F103X6 bảng dữ liệu(PDF) 56 Page - STMicroelectronics

tên linh kiện STM32F103X6
Giải thích chi tiết về linh kiện  Performance line, ARM-based 32-bit MCU with Flash, USB, CAN, seven 16-bit timers, two ADCs and nine communication interfaces
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STM32F103X6 bảng dữ liệu(HTML) 56 Page - STMicroelectronics

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Electrical characteristics
STM32F103xx
56/84
Figure 22.
I/O AC characteristics definition
5.3.13
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 33).
Unless otherwise specified, the parameters given in Table 36 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 7.
ai14131
10%
90%
50%
tr(IO)out
OUTPUT
EXT ERNAL
ON 50pF
Maximum fr equency is achieved if (tr + tf) £ 2/3)T and if the duty cycle is (45-55%)
10%
50%
90%
when loaded by 50pF
T
tr(IO)out
Table 36.
NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)
NRST Input low level voltage
–0.5
0.8
V
VIH(NRST)
NRST Input high level voltage
2
VDD+0.5
Vhys(NRST)
NRST Schmitt trigger voltage
hysteresis
200
RPU
Weak pull-up equivalent resistor(1)
1.
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)
.
VIN = VSS
30
40
50
k
Ω
VF(NRST)
NRST Input filtered pulse(2)
2.
Values guaranteed by design, not tested in production.
100
ns
VNF(NRST) NRST Input not filtered pulse
(2)
300
ns



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