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L9908 数据表(PDF) 33 Page - STMicroelectronics |
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L9908 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 152 page  Fault Flag Source Diagnosis Self-Check Failure Reaction Fault Description [n=1,2,3] HS2_OFD=0 LSn_OFD=011,101,100 [n=1,2,3] OFD Yes Flag only (NORMAL) Open connection on motor phase 1,2,3 VDH_UV=1 MBM Yes Configurable Under-voltage at VDH pin VDH_OV=1 MBM Yes Configurable Over-voltage at VDH pin VPRE_UV=1 VPRE Monitor Yes Auto-retry Under-voltage at VPRE pin VPRE_OV=1 VPRE Monitor Yes SAFE-OFF Over-voltage at VPRE pin VCP_UV=1 VCP Monitor Yes Flag only (NORMAL) Under-voltage at CP2 output VCP_OV=1 VCP Monitor Yes Flag only (NORMAL) Over-voltage at CP2 output VBP_UV=1 VBP Monitor Yes Configurable Under-voltage at VBP pin VBP_OV=1 VBP Monitor Yes Configurable Over-voltage at VBP pin WDT_DATA_fail=1 WDT NA SAFE-OFF Watchdog reset failure WDT_OVF_fail=1 WDT NA SAFE-OFF Watchdog time-out failure SPI_ERR=1 SPI CRC Check NA Ignore Frame SPI CRC Check failure SPI_ERR=1 SPI FC Check NA Ignore Frame SPI FC Check failure SPI_ERR=1 SPI Clock Counter Check NA Ignore Frame SPI Clock Counter Check failure NVM_CRC_FAIL=1 NVM Data CRC Check NA SAFE-OFF Load default values NVM Data CRC Check CFG_CRC_FAIL=1 SRR Data CRC Check NA SAFE-OFF SRR Data CRC Check BIST_STATUS=11 BIST NA SAFE-OFF BIST Failure 5.6.1 FHC registers The L9908 default FHM configuration can be modified by properly writing the FHC configuration registers through the CONFIG mode. FHC are considered as SRR. 5.6.1.1 Fault reaction configuration (FRC) For each one of the faults listed in Table 24 two configuration bits permit to define whether the corrective action shall be automatically developed by the device itself or it can be waived. Table 25. Fault reaction configuration bits <FLT_REF>_REACT_CFG1 <FLT_REF>_REACT_CFG0 Description 0 0 Full software off – disable all HB drivers and CPs, device goes in SAFE-OFF mode (Default)(1) 0 1 Reduced operation mode – disable failing HB only, device remains in NORMAL mode (2) 1 0 Flag only–down-rate fault to simple warning, device remains in NORMAL mode (3) 1 1 Flag only–down-rate fault to simple warning, device remains in NORMAL mode (3) 1. Fault danger for the application is considered high, the corrective action shall be taken as soon as it is detected by the device itself by disabling all half bridges and charge pumps. 2. Fault danger for the application is considered high, the corrective action shall be taken as soon as it is detected by the device itself by disabling only the half bridge on which the fault is present still allowing a reduced performance operation. L9908 Functional description DS13546 - Rev 5 page 33/152 |
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