Nrst Pin Characteristics; Table 41. Nrst Pin Characteristics; Figure 18. I/O Ac Characteristics Definition - STMicroelectronics STM32L151CB Manual

Electrical characteristics

Figure 18. 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
performed under ambient temperature and V
Table 9.
Table 41.
Symbol
V
IL(NRST)
V
IH(NRST)
V
OL(NRST)
V
hys(NRST)
R
PU
V
F(NRST)
V
NF(NRST)
1. Guaranteed by design, not tested in production.
2. 200 mV minimum value
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%.
76/109
NRST pin characteristics
Parameter
(1)
NRST input low level voltage
(1)
NRST input high level voltage
NRST output low level
(1)
voltage
NRST Schmitt trigger voltage
(1)
hysteresis
Weak pull-up equivalent
(3)
resistor
(1)
NRST input filtered pulse
(1)
NRST input not filtered pulse
Doc ID 17659 Rev 6
STM32L151xx, STM32L152xx
Table 41 are derived from tests
supply voltage conditions summarized in
DD
Conditions
I = 2 mA
OL
2.7 V < V < 3.6 V
DD
I = 1.5 mA
OL
1.65 V < V < 2.7 V
DD
=
V V
IN SS
Min Typ Max Unit
V 0.8
SS
1.4 V
DD
0.4
(2)
10%V
DD
30 45 60
50
350
V
mV
kΩ
ns
ns