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STA350B Datasheet(PDF) 74 Page - STMicroelectronics |
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STA350B Datasheet(HTML) 74 Page - STMicroelectronics |
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74 / 94 page  Register description STA350B, STA350BW 74/94 DocID018572 Rev 7 8.15 Fault detect recovery constant registers (addr 0x2B - 0x2C) The FDRC bits specify the 16-bit fault detect recovery time delay. When FAULT is asserted, the TRISTATE output is immediately asserted low and held low for the time period specified by this constant. A constant value of 0x0001 in this register is approximately 0.083 ms. The default value of 0x000C gives approximately 0.1 ms. 8.16 Device status register (addr 0x2D) This read-only register provides fault and thermal-warning status information from the power control block. Logic value 1 for faults or warning means normal state. Logic 0 means a fault or warning detected on power bridge. The PLLUL = 1 means that the PLL is not locked. D7 D6 D5 D4 D3 D2 D1 D0 FDRC15 FDRC14 FDRC13 FDRC12 FDRC11 FDRC10 FDRC9 FDRC8 0000 0000 D7 D6 D5 D4 D3 D2 D1 D0 FDRC7 FDRC6 FDRC5 FDRC4 FDRC3 FDRC2 FDRC1 FDRC0 0000 1100 D7 D6 D5 D4 D3 D2 D1 D0 PLLUL FAULT UVFAULT OVFAULT OCFAULT OCWARN TFAULT TWARN Table 72. Status register bits Bit R/W RST Name Description 7 R - PLLUL 0: PLL locked 1: PLL not locked 6R - FAULT 0: fault detected on power bridge 1: normal operation 5 R - UVFAULT 0: VCCxX internally detected < undervoltage threshold 4 R - OVFAULT 0: VCCxX internally detected > overvoltage threshold 3 R - OCFAULT 0: overcurrent fault detected 2 R - OCWARN 0: overcurrent warning 1R - TFAULT 0: thermal fault, junction temperature over limit detection 0R - TWARN 0: thermal warning, junction temperature is close to the fault condition |
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