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STLC5444FN Datasheet(PDF) 11 Page - STMicroelectronics |
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STLC5444FN Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 17 page The contents and format of the status groups and the LER are as follows : LVD: Bit Logical 1 Logical 0 (default value) 0 1 2 3 O0 low voltage O1 low voltage O2 low voltage O3 low voltage O0 voltage normal O1 voltage normal O2 voltage normal O3 voltage normal The Low Voltage Detector (LVD) indicates the voltage level on the output lines, even when the lines are disabled. The low-voltage condition becomes active (logical 1) if the output reaches the Low Voltage Threshold (VLVD). LEC: Bit Logical 1 Logical 0 0 1 2 3 SWITCH ON SWITCH ON SWITCH ON SWITCH ON SWITCH OFF SWITCH OFF SWITCH OFF SWITCH OFF The Line Enable Command (LEC) indicates the status of the DMOS SWITCH OUTPUT. OLD: Bit Logical 1 Logical 0 (default value) 0 1 2 3 O0 open loop O1 open loop O2 open loop O3 open loop O0 current normal O1 current normal O2 current normal O3 current normal The Open Loop Detector (OLD) indicates the open-loop condition on the output lines. The open-loop condition becomes active (logical 1) if the current on the line drops below the threshold value ISOC. COD: Bit Logical 1 Logical 0 (default value) 0 1 2 3 O0 current overload O1 current overload O2 current overload O3 current overload O0 current normal O1 current normal O2 current normal O3 current normal The Current Overload Detector (COD) indicates the current-overload condition on the output lines. The overload condition becomes active (logical 1) if the output current approaches the value programmed by an external resistor between ILIM and VBB. TOR : Bit Logical 1 (default value) Logical 0 0 1 2 3 O0 operational O1 operational O2 operational O3 operational O0 off O1 off O2 off O3 off The Thermal Overload Register (TOR) contains the overload status of the output line drivers. If the de- vice temperature reaches 130 oC, then the output line drivers that are in the current-overload condition will be switched off. The corresponding bits in the TOR will be set to a logical 0. To initialize any of the bits in the TOR, the microprocessor must first turn off the output line drivers via the LER. However, the TOR bits cannot be deactivated if the 160 oC detector is active. The µp may re-enable the output drivers via the LER after the TOR condition is removed. The TOR is a read-only register. STLC5444 11/17 |
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