Workaround payload loss of power due a voltage dip in the 12V power rail [AFCv4.0]#232
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Workaround payload loss of power due a voltage dip in the 12V power rail [AFCv4.0]#232
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We observed that a specific AFCv4.0 card suffers a loss of power in the payload power rails event though the MCH indicates that the card is in M4 state. It seems that the MMC detects a voltage dip in the 12V power rail and turns off the DC/DC converters, but we suspect it is a false reading. This is a workaround to try avoiding turning off the payload power if the AMC +12V voltage measurement dips below 8V for a single measurement.
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We observed that a specific AFCv4.0 card suffers a loss of power in the payload power rails event though the MCH indicates that the card is in M4 state. It seems that the MMC detects a voltage dip in the 12V power rail and turns off the DC/DC converters, but we suspect it is a false reading.