12-Bit Adc Characteristics; Table 54. Adc Characteristics; Figure 25. Recommended Nrst Pin Protection - STMicroelectronics STM32F042F4 Manual

Electrical characteristics
Symbol Parameter
NRST Schmitt trigger voltage
V
hys(NRST)
hysteresis
Weak pull-up equivalent
R
PU (2)
resistor
V NRST input filtered pulse
F(NRST)
V NRST input not filtered pulse
NF(NRST)
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.
1. The external capacitor protects the device against parasitic resets.
2. The user must ensure that the level on the NRST pin can go below the V
Table 53: NRST pin
6.3.16

12-bit ADC characteristics

Unless otherwise specified, the parameters given in
performed under the conditions summarized in
Note: It is recommended to perform a calibration after each power-up.
Symbol
Analog supply voltage for
V
DDA
ADC ON
Current consumption of
I
DDA (ADC)
the ADC
f ADC clock frequency
ADC
(2)
f Sampling rate
S
78/117
Table 53. NRST pin characteristics (continued)
Conditions
V
2.7 < V
2.0 < V

Figure 25. Recommended NRST pin protection

characteristics. Otherwise the reset will not be taken into account by the device.

Table 54. ADC characteristics

Parameter
(1)
DocID025832 Rev 5
Min
- -
V 25
=
IN SS
- -
(3)
< 3.6 300
DD
(3)
< 3.6 500
DD
Table 54
Table 21: General operating
Conditions
-
V = 3.3 V
DDA
-
12-bit resolution
STM32F042x4 STM32F042x6
Typ Max
200
40 55
- 100
-
-
max level specified in
IL(NRST)
are derived from tests
Min Typ Max
2.4 - 3.6
- 0.9
0.6 -
0.043 -
Unit
- mV
kΩ
(1)
ns
-
ns
-
conditions.
Unit
V
- mA
14 MHz
1 MHz