STM8SPLNB1 Datasheet, PDF (26/44 Pages) STMicroelectronics – Internal 16MHz oscillator

Electrical characteristics
STM8SPLNB1
4.3.5
EMC characteristics
Susceptibility tests are performed on a sample basis during product characterization.
Functional EMS (electromagnetic susceptibility)
While executing a simple application (toggling 2 LEDs through I/O ports), the product is
stressed by two electromagnetic events until a failure occurs (indicated by the LEDs).
 ESD: Electrostatic discharge (positive and negative) is applied on all pins of the device
until a functional disturbance occurs. This test conforms with the IEC 1000-4-2
standard.
 FTB: A burst of fast transient voltage (positive and negative) is applied to V_DD and V_SS
through a 100 pF capacitor, until a functional disturbance occurs. This test conforms
with the IEC 1000-4-4 standard.
A device reset allows normal operations to be resumed. The test results are given in the
table below based on the EMS levels and classes defined in application note AN1709 (EMC
design guide for STMicrocontrollers).
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 application.
1. Prequalification trials
Most of the common failures (unexpected reset and program counter corruption) can be
reproduced by manually forcing a low state on the RESET pin for 1 second.
To complete these trials, ESD stress can be applied directly on the device, over the range of
specification values.
Table 27. EMS data
Symbol
Parameter
Conditions
V_FESD
Voltage limits to be applied on any I/O pin
to induce a functional disturbance
V_DD 3.3 V, T_A 25 °C,
f_CPU 16 MHz (HSI clock),
conforming to IEC 1000-4-2
V_EFTB
Fast transient voltage burst limits to be
applied through 100 pF on V_DD and V_SS
pins to induce a functional disturbance
V_DD3.3 V, T_A 25 °C,
f_CPU 16 MHz (HSI clock),
conforming to IEC 1000-4-4
Level/class
2/B
4/A
26/44
DocID018831 Rev 5