STM32F103R4 STMicroelectronics, STM32F103R4 Datasheet - Page 61

• Manufacturer Part Number: STM32F103R4
• Description: Mainstream Performance line, ARM Cortex-M3 MCU with 16 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN
• Manufacturer: STMicroelectronics

Specifications of STM32F103R4

• Conversion Range: 0 to 3.6 V
• Peripherals Supported: timers, ADC, SPIs, I2Cs and USARTs

STM32F103x4, STM32F103x6
5.3.14
Figure 27. 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 38.
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
Table
NF(NRST)
IH(NRST)
IL(NRST)
Symbol
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
Maximum frequency is achieved if (t
External
on 50pF
Output
Table
35).
Parameter
t r(I O)out
Doc ID 15060 Rev 5
(~10% order)
10%
50%
when loaded by 50 pF
90%
r
(2)
+ t
.
f
) ≤ 2/3)T and if the duty cycle is (45-55%)
Conditions
DD
V
IN
T
10%
supply voltage conditions summarized
=
Table 38
V
50%
SS
90%
t r(I O)out
are derived from tests
–0.5
Min
300
30
2
Electrical characteristics
Typ
200
40
V
DD
Max
100
0.8
50
+0.5
ai14131
Unit
mV
61/87
kΩ
ns
ns
V