STM32F373C8 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STM32F373C8
STMicroelectronics
'STM32F373C8' PDF : 131 Pages View PDF
STM32F373xx
Electrical characteristics
Figure 19. I/O AC characteristics definition
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6.3.15 NRST characteristics
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 52).
Unless otherwise specified, the parameters given in Table 55 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 22.
Table 55. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)(1) NRST Input low level voltage
VIH(NRST)(1) NRST Input high level voltage
-
-
-
0.445VDD + 0.398(1)
-
-
0.3VDD + 0.07(1)
-
V
Vhys(NRST)(1)
NRST Schmitt trigger voltage
hysteresis
-
-
200
-
mV
RPU
Weak pull-up equivalent resistor(2)
VF(NRST)(1) NRST Input filtered pulse
VNF(NRST)(1) NRST Input not filtered pulse
VIN = VSS
-
-
25
40
55
kΩ
-
-
100
ns
500
-
-
ns
1. Guaranteed by design.
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series
resistance is minimal (~10% order).
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