8.4.1 Modes of Operation
SHUTDOWN:The NRST voltage is below threshold level. All switch, reference, control, and bias circuitry of the LP87524B/J/P-Q1 device are turned off.
READ OTP:The main supply voltage VANA is above VANAUVLO level and NRST voltage is above threshold level. The regulators are disabled and the reference and bias circuitry of the LP87524B/J/P-Q1 are enabled. The OTP bits are loaded to registers.
STANDBY:The main supply voltage VANA is above VANAUVLO level and NRST voltage is above threshold level. The regulators are disabled and the reference, control and bias circuitry of the LP87524B/J/P-Q1 are enabled. All registers can be read or written by the host processor via the system serial interface. The regulators can be enabled if needed.
ACTIVE:The main supply voltage VANA is above VANAUVLO level and NRST voltage is above threshold level. At least one regulated DC-DC converter is enabled. All registers can be read or written by the host processor via the system serial interface.
The operating modes and transitions between the modes are shown in Figure 15.