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L9908 датащи(PDF) 41 Page - STMicroelectronics |
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L9908 датащи(HTML) 41 Page - STMicroelectronics |
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41 / 153 page ![]() 5.6.3 Half bridges disable logic The enabling/disabling operation of the n-th Half Bridges is managed by a dedicated combinatory disable logic which constantly processes the following disable sources: • HBn_DIS SPI configuration register status • EN_BR pin status • STD faults detection • VPRE UV fault detection • NDIS pin state • Configurable reaction faults detection with related FRC set as 00 or 01 The status of the n-th disable n-th half bridge is echoed into dedicated SPI readable registers: HBn_EN_ECHO [n = 1, 2, 3]. 5.6.4 Gate driver supply enable logic The enabling/disabling operation of the Gate Driver supply unit (CP1 and CP2) is managed by a dedicated combinatory disable logic which constantly processes the following disable sources: • CP1_DIS & CP2_DIS SPI bits status (within register SAFETY_RELEVANT3) • STD faults detection • NDIS pin status • Configurable reaction faults detection with related FRC set as 00 The status of the n-th charge pump is echoed into dedicated SPI signals CPn_EN_ECHO [n = 1,2,3], within register GEN_STATUS3. L9908 Fault Handling Management (FHM) DS13546 - Rev 3 page 41/153 |
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