5.3 Safety and IEC 60730 Features

Table 5-1. Safety and IEC 60730 Features List
Peripheral Component Fault/Error/Feature Requirements for Class B

IEC 60730(1)

General Safety
PMC Clock CPU clock monitoring

- Overclocking detection

X
32.768 kHz crystal oscillator frequency monitoring

- Abnormal frequency deviation

X X
Main crystal oscillator

- Crystal failure detection

X X
PIOC I/O Periphery Programmable configuration lock (active until next VDDCORE reset) to protect against further software modifications (intentional or unintentional) X
Digital I/O

- Plausibility check

X
ADCC Analog I/O and ADC converter

- Plausibility check

X
ICM (SHA) Memory and Internal Data Path All internal and external memories such as QSPI, DDR, and all memories on SMC X
NAND Flash Controller ECC Non-volatile memory

- Mutiple error detection (2 to 32)

X
System Controller Supply Monitor Power supplies

- VDDCORE, VDDIO, VDDANA, VDDBU abnormal levels

X
WDT,

RSTC

Watchdog Watchdog can be fed by an internal always ON clock

- Program counter stuck at faults.

X X
Watchdog configuration can be locked (write-protected)

- Errant writes (Programming errors, errors introduced by system or hardware failures)

X
Watchdog overflow generates a system reset X X
Cortex MMU Memory Management Unit Cortex-A5 Memory Management Unit X
MATRIX, AIC, RTC, SYSC, RXLP, ACC, PMC, PIO, MPDDRC, SMC, CLASSD, SSC, TWI, UART, SPI, FLEXCOM, QSPI, TC, PDMIC, ADC Peripherals Configuration, Interrupt Enable/Disable, Control registers can be independently write-protected

- Errant writes (Programming errors, errors introduced by system or hardware failures)

X
PWM,

PIO

PWM Fault inputs can be configured to put the PWM outputs in Safe mode

- Programming errors, errors introduced by system or hardware failures

X
PIO controller can lock the PWM I/O

- Programming errors, errors introduced by system or hardware failures

X
Fault inputs can be external (IO) or internal (ADC, TIMER, ACC, etc.)

- Programming errors, errors introduced by system or hardware failures

X
Note:

Class B IEC 60730 Requirements. Annex H - Table H.1 (H.11.12.7 of edition 3).