AN3077 datasheet(30/82 Pages) STMICROELECTRONICS

30 / 82 page

Functional safety requirements for application software

AN3077

30/82

DocID16384 Rev 10

Figure 6. Double Write PWM Output configuration

3.13.5.1.1

Software test implementation

●

SIUL_SWTEST_REGCRC

The SIUL configuration registers are read and a CRC checksum is computed. The

CRC checksum is compared to the expected value.

●

ETIMER0_SWTEST_REGCRC

The eTimer_0 configuration registers are read and a CRC checksum is computed. The

checksum is compared to the expected value.

●

ETIMER1_SWTEST_REGCRC

The eTimer_1 configuration registers are read and a CRC checksum is computed. The

checksum is compared to the expected value.

●

FLEXPWM0_SWTEST_REGCRC

The FlexPWM_0 configuration registers are read and a CRC checksum is computed.

The checksum is compared to the expected value.

●

FLEXPWM1_SWTEST_REGCRC

The FlexPWM_01 configuration registers are read and a CRC checksum is computed.

The checksum is compared to the expected value.

Note:

Implementation hint: The eDMA and CRC modules should be used to implement this SIF

to avoid overloading the CPU.

●

PWMDW_SWAPP_WRITE

eTimer_0

PWM Out Double Write

Configuration (eTimer)

eTimer_1

Flex

PWM Out Double Write

Configuration (FlexPWM)

Flex

PWM_0

PWM_1

ETC[x]*

= Output Pad

ETC[y]*

n[z]*

Note: n[z] represents any FlexPWM output (for example, A[z], B[z] or X[z]), but each

output must be driven by different FlexPWM modules. The same consideration is

valid for the eTimer; any eTimer output may be used, but each output must be driven

by different eTimer module.

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