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STM32F103XC Datasheet(PDF) 87 Page - STMicroelectronics

Part # STM32F103XC
Description  Performance line, ARM-based 32-bit MCU with up to 512 KB Flash, USB, CAN, 11 timers, 3 ADCs and 13 communication interfaces
PDF  118 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F103XC Datasheet(HTML) 87 Page - STMicroelectronics

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STM32F103xC, STM32F103xD, STM32F103xE
Electrical characteristics
87/118
Figure 40.
I/O AC characteristics definition
5.3.14
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 44).
Unless otherwise specified, the parameters given in Table 47 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 9.
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 47.
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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