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STV6889 数据表(PDF) 46 Page - STMicroelectronics |
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STV6889 数据表(HTML) 46 Page - STMicroelectronics |
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46 / 56 page ![]() STV6889 46/56 Figure 17. Safety functions - block diagram VCC supervision H-drive inhibition V-drive inhibition B-drive inhibition SOFT H-drive inhibit R S H-lock detector V-sync R S Q + S _ + _ V-sawtooth discharge I²C I²C I²C I²C I²C (timing) I²C I²C I²C I²C bit/flag Pin Int. signal VCCEn VCCDis VThrHFly + _ VThrXRay H-VCO L2=H-lock/unlock level L1=No blank/blank level L3=L1+L2 In Out Q (overrule) B-drive inhibit discharge control I²C H-lock detector I²C PLL1 PLL2 DC/DC BMute BSafeEn START & STOP INHIBITION CONTROL HBOutEn XRayReset XRayAlarm VOutEn BlankMode HLockEn HLock 10 HPosF VCCXRayEn VCC VCC + _ :2 Enable 25 XRay 12 HFly 3 HLckVBk X B-drive protection at H-unlock = start = stop 0=Off 1= On |
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