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STM32F101R4U6ATR Datasheet(PDF) 58 Page - STMicroelectronics

Part # STM32F101R4U6ATR
Description  Low-density access line, ARM®-based 32 bit MCU with 16 or 32 KB Flash, 5 timers, ADC and 4 communication interfaces
PDF  87 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F101R4U6ATR Datasheet(HTML) 58 Page - STMicroelectronics

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Electrical characteristics
STM32F101x4, STM32F101x6
58/87
DocID15058 Rev 6
Figure 26. 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 33).
Unless otherwise specified, the parameters given in Table 36 are derived from tests
performed under the ambient temperature and VDD supply voltage conditions summarized
in Table 8.
Table 36. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)(1)
1. Guaranteed by design, not tested in production.
NRST Input low level voltage
-
–0.5
-
0.8
V
VIH(NRST)(1) NRST Input high level voltage
-
2
-
VDD+0.5
Vhys(NRST)
NRST Schmitt trigger voltage
hysteresis
-
-
200
-
mV
RPU
Weak pull-up equivalent resistor(2)
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)
.
VIN = VSS
30
40
50
k
Ω
VF(NRST)(1) NRST Input filtered pulse
-
-
-
100
ns
VNF(NRST)(1) NRST Input not filtered pulse
-
300
-
-
ns



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