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STM32F401CC Fiches technique(PDF) 94 Page - STMicroelectronics

No de pièce STM32F401CC
Description  Up to 81 I/O ports with interrupt capability
PDF  134 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F401CC Fiches technique(HTML) 94 Page - STMicroelectronics

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Electrical characteristics
STM32F401xB STM32F401xC
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DocID024738 Rev 5
Figure 31. I/O AC characteristics definition
6.3.17
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 the ambient temperature and VDD supply voltage conditions summarized
in Table 14. Refer to Table 54: I/O static characteristics for the values of VIH and VIL for
NRST pin.
Table 57. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RPU
Weak pull-up equivalent
resistor(1)
VIN = VSS
30
40
50
k
Ω
VF(NRST)(2) NRST Input filtered pulse
-
-
100
ns
VNF(NRST)(2) NRST Input not filtered pulse
VDD > 2.7 V
300
-
-
ns
TNRST_OUT Generated reset pulse duration
Internal Reset
source
20
-
-
µs
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)
.
2. Guaranteed by design.



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