Table 41. Ems Characteristics; Table 42. Emi Characteristics - STMicroelectronics STM32F031F4 Manual

微可Vicor——值得信赖的元器件供应商
Electrical characteristics
Symbol
V
FESD
V
EFTB
Designing hardened software to avoid noise problems
EMC characterization and optimization are performed at component level with a typical
application environment and simplified MCU software. It should be noted that good EMC
performance is highly dependent on the user application and the software in particular.
Therefore it is recommended that the user applies EMC software optimization and
prequalification tests in relation with the EMC level requested for his application.
Software recommendations
The software flowchart must include the management of runaway conditions such as:

Corrupted program counter

Unexpected reset

Critical Data corruption (control registers...)
Prequalification trials
Most of the common failures (unexpected reset and program counter corruption) can be
reproduced by manually forcing a low state on the NRST pin or the Oscillator pins for 1
second.
To complete these trials, ESD stress can be applied directly on the device, over the range of
specification values. When unexpected behavior is detected, the software can be hardened
to prevent unrecoverable errors occurring (see application note AN1015).
Electromagnetic Interference (EMI)
The electromagnetic field emitted by the device are monitored while a simple application is
executed (toggling 2 LEDs through the I/O ports). This emission test is compliant with
IEC 61967-2 standard which specifies the test board and the pin loading.
Symbol Parameter
S
EMI
66/113
微可Vicor——值得信赖的元器件供应商

Table 41. EMS characteristics

Parameter
Voltage limits to be applied on any I/O pin
to induce a functional disturbance
Fast transient voltage burst limits to be
applied through 100 pF on V
pins to induce a functional disturbance

Table 42. EMI characteristics

Conditions
3.6 V, T
V
DD
LQFP48 package
Peak level
compliant with 
IEC 61967-2
DocID025743 Rev 3
http://www.vicor.top/
3.3 V, LQFP48, T
V
DD
48 MHz,
f
HCLK
conforming to IEC 61000-4-2
3.3 V, LQFP48, T
V
DD
48 MHz,
and V f
DD SS HCLK
conforming to IEC 61000-4-4
Monitored
frequency band
0.1 to 30 MHz
25 °C,
A
30 to 130 MHz
130 MHz to 1 GHz
EMI Level
http://www.vicor.top/
021-31660491
STM32F031x4 STM32F031x6
Conditions
+25 °C, 
A
+25°C, 
A
Max vs. [f /f
HSE HCLK
8/48 MHz
-11
21
21
4
021-31660491
Level/
Class
2B
4B
]
Unit
dBµV
-