new values are based on stabilityTester results when using 930mV for 1.6GHz and 980mV for 1.8GHz, xhpl failed randomly. So 930/980mV are the critical operation voltage.Then increase 10mV and run 100 times test, result shows that xhpl (not always) failed 1~2 times. It seems +10mV is still not enough to ensure dc-dc output voltage always above operation voltage, that means the design of dc-dc converter is not good enough that results in large ripple. The testing script is "github.com/mzhboy/StabilityTester" The following configuration have been tested. 1.08-1.32-1.48-1.64-1.8 GHz 900-910-920-930-990 *ok, 930 failed 2/100 900-900-910-940-990 *ok, 990 failed 1/100 890-900-910-940-990 *ok, 990 failed 1/100 880-880-910-940-1000 *ok, 940 failed 2/100 880-880-910-950-1000 *ok, 1000 failed 1/100 880-880-910-950-1010 *ok |
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