STM32 (CORTEX M3) - Self-test routines Class B norm certification

Since October 2007, household appliances must comply with the EN/IEC60335-1 norm. Don’t let this recent change in safety certification requirements slow down application development. STM32 self-diagnostic modules facilitate home appliance certification under EN/IEC60335-1 Class B norm (functional safety) by providing a full set of self-test routines that are ready to integrate in any application and that have been certified by VDE – a worldwide recognized test institute and pioneer in software testing.
The STM32 library was certified by VDE, October 10-12 2007 making ST one of the first 32-bit microcontroller manufacturers to deliver approved routines.

ST’s products will ease our customers' certifications
Hardware features that include:
	Dual Watchdog architecture that eliminates need for external Watchdog
	One has its own independent clock (RC), the other is windowed
	Started by hardware (option byte in flash)
	Internal timer clocked on RC that allows frequency deviation detection
	I/Os in high impedance state under reset
Software features that include:
	Class B self diagnostic routines for the STM32 (RAM, Flash, external clock and core testing). These routines, with associated documentation, are available free of charge from ST on request. Contact your nearest ST offices
	All libraries (standard and application specific) developed to maximize MISRA C compliancy. Refer to www.st.com/stm32
Requirements for Class B
A list of MCU “components” are evaluated for Class B compliance Some aspects are application specific and rely on customer’s know-how and system architecture Communication protocol Plausibility check on analog inputs Motor parameters dependant routines interrupts Some others are purely related to the micro and can be made generic and are addressed by ST's self-tes routines Core self-diagnostic RAM functional test ROM/Flash integrity Crystal/resonator clock frequency Components to be tested CPU registers CPU program counter Interrupt handling and execution Clock Invariable memory Variable memory Internal Addressing Internal data path External addressing, if any External communication Timing I/O periphery Analog A/D and D/A Analog multiplexer