Appendix A
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Table 6. Summary of Safety Features and Recommendations (continued)
Feature
Device
Recommendation
Partition
Module Boot
Device Partition Level Safety Features or Diagnostic Time Periodic Possible Diagnostic Measures
Control and
Communication
Peripherals
Communication C28x_SCIx Enable Internal Loop back to check Software error response on
peripherals: data integrity and transfer Internal loop back
SCI,SPI,I2C,McBSP,USB
EQEP C28x_EQEPx Register, QEP timer check Periodic QEP Timer check
ECAP C28x_EQEPx Check for APWM event triggers, and ++ Internal loop back and timing
interrupt order, with GPIOs as inputs check
EPWM C28x_EPWM Check for PWM event triggers, and ++ ++ Software response to periodic
x interrupt order with GPIOs as inputs PWM event trace
HRPWM C28x_HPWM Check SFO functions to estimate ++ ++ Software response to Internal
and presence of MEP steps on SFO calibration
HRPWM
TRIP Zone C28x_TRIP Internal Trip trigger checks + Software response to internal
TRIP requests
Analog Subsystem
ADC C28x_ADC Check for PWM event triggers to ++ + Software response to periodic
ADC and interrupt order ADC results signature
DAC and CMP C28x_DAC Check for PWM event triggers to ++ Periodic software response to
DAC compare runtime event trace with PWM
module
Comparator C28x_CMP Register check, internal trigger limit + Software response to internal
check TRIP requests
POR and BOR POR, BOR detect
Oscillator_1 A_OSC OSC clock accuracy check using ++ ++ OSC clock fail detect
HRPWM
Oscillator_2 OSC clock accuracy check using ++ ++ Software response to Timer 2
Timer2
External CLKIN A_CLKIN OSC clock accuracy check using ++ ++ Clockin fail detect
HRPWM
PLL A_PLL OSC and PLL clock accuracy check ++ SFO library check
using HRPWM
Temp Sensor A_TEMP Check for Temp sensor select and ++ Temp sensor compare with in
conversion system response
GPIO A_GPIO Register check and mux select Software response on registers
and inputs - Internal interrupt on
Pins
Custom Software
Custom IP software IP_Custom Check Code integrity - CRC and ++ ++ Periodic Software response on
function code functionality check with test runtime use of Code integrity and
vectors test vector validation
30
Summary of Recommended Safety Feature Usage SPRUHI3A–April 2013–Revised August 2013
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