Compliance with IEC and VDE standards

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Doc ID 17286 Rev 2

safety standards are being harmonized to international safety standards. For example, the

UL 60335-1, the DSA 60335-1 and the EN 60335-1 are all documents which are based on

the IEC 60335-1. VDE also includes a Testing and Certification Institute which is a pioneer

of software safety inspection. This is a registered National Certification Body (NCB) for

Germany. The main purpose of this testing house is to offer standards compliance and

quality testing services for electrical appliance manufacturers. The STM8 FW in this

package has been VDE certified.

2.1

Generic tests included in the ST firmware library

STM8 firmware library packages include the following microcontroller specific software

modules, which have also been certified by VDE:

●

CPU registers test

●

clock monitoring

●

RAM functional check

●

FLASH checksum integrity check

●

watchdog self-test

●

stack overflow monitoring

An overview of the methods used for these MCU-specific tests is given in Table 3 and they

are described in more detail in the following chapters. The last two items from the list above

are not explicitly asked for by the norm, but they improve overall fault coverage.

Table 2.

MCU components to be tested for Class B compliance

Group

Components to be tested

Micro specific

CPU registers

CPU program counter

Clock

Fixed and variable memory spaces

Internal addressing

Internal data path

Application specific

Interrupt handling

External communication and addressing (if any)

Timing

I/O periphery

ADC and DAC

Analog multiplexer