Datasheet

Electrical characteristics STM32F030x4/x6/x8/xC
66/93 DS9773 Rev 4
Figure 21. I/O AC characteristics definition
6.3.15 NRST pin characteristics
The NRST pin input driver uses the CMOS technology. It is connected to a permanent pull-
up resistor, R
PU
.
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature and supply voltage conditions summarized in
Table 21: General operating conditions.
MS32132V3
T
10%
50%
90%
10%
50%
90%
Maximum frequency is achieved if (t + t ) ≤
when loaded by C (see the table I/O AC characteristics definition)
rf
r(IO)out
t
f(IO)out
t
L
2
3
T and if the duty cycle is (45-55%)
Table 49. NRST pin characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
IL(NRST)
NRST input low level voltage - - - 0.3 V
DD
+0.07
(1)
V
V
IH(NRST)
NRST input high level voltage - 0.445 V
DD
+0.398
(1)
--
V
hys(NRST)
NRST Schmitt trigger voltage
hysteresis
--200-mV
R
PU
Weak pull-up equivalent
resistor
(2)
V
IN
= V
SS
25 40 55 kΩ
V
F(NRST)
NRST input filtered pulse - - - 100
(1)
ns
V
NF(NRST)
NRST input not filtered pulse
2.7 < V
DD
< 3.6 300
(3)
--
ns
2.4 < V
DD
< 3.6 500
(3)
--
1. Data based on design simulation only. Not tested in production.
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).
3. Data based on design simulation only. Not tested in production.