13.19.4.2 Start-up/FAULT Pin State

During device start-up or Power-on Reset (POR), the FAULT pin will stay active (low) to indicate to the host that the device is initializing. The FAULT pin will stay active until the state machine powers up the V_REG LDO and completes the V_REG state. After the V_REG LDO is powered up, the FAULT pin logic checks the state of all of the latched FAULT bits. If any FAULT bit is still active, the FAULT pin will stay active and remain low.

Table 13-5. Internal Function Block Status
System State	Fault	Conditions	Sleep Latch	V_REG LDO	V_BOOT LDO	Motor Drivers	DE2	Op Amps	Internal UVLO, OVLO, OTP
Sleep		OE = 0, SLEEP = 1	W	—	—	—	—	—	—
Standby		OE = 0, SLEEP = 0	—	A	—	—	A	C	A
Operating		OE = 1, FAULT = 1	—	A	A	A	A	A	A
Faults FAULT = 0	Driver OTPF	TJ Temperature > +160°C	—	—	—	—	D	—	A
	HV_DDUVLO	HV_DD ≤ UVLO_INACT	—	A	—	—	A	A	A
	HV_DDUVSHDN	HV_DD ≤ UVSHDN_INACT	—	—	—	—	E	—	—
	HV_DDOVLO	HV_DD ≥ OVLO_INACT	—	A	—	—	A	A	A
	V_DDOVSHDN	HVdd ≥ OVSHDN_INACT	—	—	—	—	—	—	A
	V_REG LDO UVF	V_REG ≤ 88% V_REG	—	A	—	—	A	A	A
	MOSFET UVLO	V_HS[A:C] < V_DUVLO V_LS[A:C] < V_DUVLO	—	A	A	—	A	A	A
	MOSFET OCPF	V_{DRAIN SOURCE} > EXTOC[1:0] setting	—	A	A	—	A	A	A
Warnings FAULT = 1	Driver Temperature	TJ Temperature > 72% T_{SD_MIN} (+115°C for +160°C driver OTP)	—	A	A	A	A	A	A
Power Status	Configuration lost if Power-on Reset, wake from Sleep or recover from HVDD Undervoltage Shutdown occurred	Set at initial power-up when HV_DD < UVSHDN_ACT or when waking from Sleep	—	A	A	A	A	A	A
Legend: — = Inactive (Off); A = Active (On); C = Configurable; D = Inactive (Off) 5 ms after sent Fault message; E = Inactive (Off); R = Receiver Only; W = Wake-up (from Sleep); OCPF = Overcurrent Protection; OTPF = Overtemperature Protection; UVLO = Undervoltage Lockout; OVLO = Overvoltage Lockout; UVF = Undervoltage Fault; UVSHDN = Undervoltage Shutdown; OVSHDN = Overvoltage Shutdown