STM32F103C4H6ATR STMICROELECTRONICS [STMicroelectronics], STM32F103C4H6ATR Datasheet - Page 55

• Manufacturer Part Number: STM32F103C4H6ATR
• Description: Low-density performance line, ARM-based 32-bit MCU with 16 or 32 KB Flash, USB, CAN, 6 timers, 2 ADCs, 6 communication interfaces
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

5.3.13
Figure 22. I/O AC characteristics definition
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, R
Unless otherwise specified, the parameters given in
performed under the ambient temperature and V
in
Table 37.
1. Guaranteed by design, not tested in production.
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution
V
V
V
V
V
NF(NRST)
Table
IH(NRST)
Symbol
IL(NRST)
F(NRST)
hys(NRST)
to the series resistance must be minimum
R
PU
9.
(1)
(1)
(1)
(1)
PU
NRST pin characteristics
(see
NRST Input low level voltage
NRST Input high level voltage
NRST Schmitt trigger voltage
hysteresis
Weak pull-up equivalent resistor
NRST Input filtered pulse
NRST Input not filtered pulse
EXT ERNAL
OUTPUT
ON 50pF
Maximum frequency is achieved if (t r + t f ) 2/3)T and if the duty cycle is (45-55%)
Table
34).
Parameter
t r(I O)out
Doc ID 15060 Rev 3
(~10% order)
10%
50%
when loaded by 50pF
90%
(2)
.
Conditions
DD
V
IN
T
10%
supply voltage conditions summarized

Table 37
V
50%
SS
90%
t r(I O)out
are derived from tests
–0.5
Min
300
30
2
Typ
200
40
V
DD
Max
100
0.8
50
+0.5
ai14131
Unit
mV
55/80
k
ns
ns
V