AS8221
Data Sheet - Detailed Description
8.12.5 BP Short Circuit to VCC (BP_VCC)
The BP_VCC can only be set/reset in NORMAL mode if the driver is enabled while Data0 and Data1 are transmitted for longer than tBUS_ERROR
.
The flag is set if the absolute current at BP is lower than ITHL during transmission of Data1 longer than tBUS_ERROR and if the absolute current at
BP is higher than ITHH during transmission of Data0 for a time longer than tBUS_ERROR
.
The flag is reset in POWER-OFF mode and in case the setting conditions are not fulfilled.
8.12.6 BP Short Circuit to GND (BP_GND)
The BP_GND can only be set/reset in NORMAL mode if the driver is enabled while Data0 and Data1 are transmitted for longer than tBUS_ERROR
.
The flag is set if the absolute current at BP is higher than ITHH during transmission of Data1 longer than tBUS_ERROR and if the absolute current
at BP is lower than ITHL during transmission of Data0 for a time longer than tBUS_ERROR
.
The flag is reset in POWER-OFF mode and in case the setting conditions are not fulfilled.
8.12.7 BM Short Circuit to VCC (BM_VCC)
The BM_VCC can only be set/reset in NORMAL mode if the driver is enabled while Data0 and Data1 are transmitted for longer than tBUS_ERROR
.
The flag is set if the absolute current at BM is lower than ITHL during transmission of Data0 longer than tBUS_ERROR and if the absolute current at
BM is higher than ITHH during transmission of Data1 for a time longer than tBUS_ERROR
.
The flag is reset in POWER-OFF mode and in case the setting conditions are not fulfilled.
8.12.8 BM Short Circuit to GND (BM_GND)
The BM_GND can only be set/reset in NORMAL mode if the driver is enabled while Data0 and Data1 are transmitted for longer than tBUS_ERROR
.
The flag is set if the absolute current at BM is higher than ITHH during transmission of Data0 longer than tBUS_ERROR and if the absolute current
at BM is lower than ITHL during transmission of Data1 for a time longer than tBUS_ERROR
.
The flag is reset in POWER-OFF mode and in case the setting conditions are not fulfilled.
8.12.9 Short Circuit between BP and BM (BP_BM)
The BP_BM can only be set or reset in NORMAL mode while the driver is active (edge at TxEN) for a time longer than tBUS_ERROR
.
The flag is set if the absolute value of the differential voltage is lower than VSHORT for a time tBUS_ERROR
.
The flag is reset in POWER-OFF mode and if the set condition is not fulfilled.
8.12.10 Over Temperature (OT)
This flag can only be set or reset in the non-low-power modes. The flag is set if the junction temperature exceeds OTTH and it is reset if the
junction temperature falls below OTTL
.
8.12.11 TxEN_BGE Timeout (TxEN_TO)
This flag can only be set in NORMAL mode if the driver is enabled (TxEN is low and BGE is high) for a time longer than tTxEN_max. It is reset
during transition on TxEN or BGE or if the device exits NORMAL mode. If the flag is set the driver is disabled.
8.12.12 Error Flag (ERROR)
The ERROR is signalled on the ERRN pin according to Table 6 and Table 8.
The flag is set if at least one of the error flags in chapters 8.12.2 to 8.12.11 is set. The flag will be reset if none of the flags in chapters 8.12.2 to
8.12.11 is set.
8.13 Status Flags Description
8.13.1 Local Wake Flag (LWAKE)
See chapter 8.7 Wake-Up Events on page 17
8.13.2 Remote Wake Flag (RWAKE)
see chapter 8.7 Wake-Up Events on page 17
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