Datasheet

STM32L100C6, STM32L100R8/RB Electrical characteristics
DocID024295 Rev 1 75/102
Figure 14. I/O AC characteristics definition
6.3.13 NRST pin characteristics
The NRST pin input driver uses CMOS technology.
Unless otherwise specified, the parameters given in Table 43 are derived from tests
performed under ambient temperature and V
DD
supply voltage conditions summarized in
Table 1 2.
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Table 43. NRST pin characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
IL(NRST)
(1)
1. Guaranteed by design, not tested in production.
NRST input low level voltage V
SS
0.8
V
V
IH(NRST)
(1)
NRST input high level voltage 1.4 V
DD
V
OL(NRST)
(1)
NRST output low level
voltage
I
OL
= 2 mA
2.7 V < V
DD
< 3.6 V
0.4
I
OL
= 1.5 mA
1.8 V < V
DD
< 2.7 V
V
hys(NRST)
(1)
NRST Schmitt trigger voltage
hysteresis
10%V
DD
(2)
2. 200 mV minimum value
mV
R
PU
Weak pull-up equivalent
resistor
(3)
3. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance is around 10%.
V
IN
= V
SS
30 45 60 kΩ
V
F(NRST)
(1)
NRST input filtered pulse 50 ns
V
NF(NRST)
(1)
NRST input not filtered pulse 350 ns