Safety Manual for MPC5777M, Rev. 1.1
Functional safety requirements for application software
NXP Semiconductors22
NOTE
This is to check that the voltage supervised by the LVD/HVD is actually the
correct one and not influenced by opens or shorts in such a way that it never
could cross the LVD/HVD threshold. The LVDs/HVDs are monitored by
SARADC_B input channels 96 to 101 and 112 to 119(see the MPC5777M
Reference Manual’s “Analog-to-Digital Converters (ADC) Configuration”
chapter and the “SARADC_B analog test channel assignment” table for
details).
Assumption: [SM_FMEDA_150] Software shall initiate a self-test of LVD/HVD comparator. [end]
NOTE
This is to check that a LVD/HVD will trigger at approximately correct value
(see the MPC5777M Reference Manual’s “Power Management Controller
digital interface (PMC_dig)” chapter, section “Voltage Detect User Mode
Test Register (VD_UTST)”, and the “Device Configuration” chapter, “LVD
/ HVD self test” section, “LVD /HVD self test decoding” table).
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