DA9063_17 Datasheet, PDF (108/219 Pages) Dialog Semiconductor – System PMIC for Mobile Application Processors

DA9063
System PMIC for Mobile Application Processors
The regulator monitor unit provides alternative modes selected via MON_MODE. In measurement-
only mode, the event flag E_REG_UVOV is set for every automatic measurement result being
available on either A8, A9, or A10 (with a maximum of one regulator per channel being enabled for
measurements). When enabled, an auto-measurement on A8, A9, or A10 allows the host to get its
actual output voltage from registers MON_A8_RES to MON_A10_RES. When multiple ADC
channels are enabled for automatic regulator voltage measurements, the burst measurement mode
may reduce the control interface traffic and number of nIRQ assertions. When the ADC time slot of
A10 has finished, the event flag E_REG_UVOV is set (independent of A10 being enabled for auto-
measurements). The host can then read the measurement results stored inside MON_A8_RES -
MON_A10_RES as a block. During measurement modes, there are no threshold comparisons or
regulator shutdowns. If the nIRQ line was asserted, automatic measurements on channels A8 (A9
and A10) are paused until the host has cleared the associated event flag (the event-causing value is
kept in the result registers). During measurement modes, E_REG_UVOV is cleared by writing the
read value into register EVENT_B. To sequentially measure other regulators on ADC input channels
A8, A9, and A10, the host has to set the monitor enable for the next measurement slot to the
required regulator before clearing the event. The assertion of nIRQ can be masked by IRQ mask
M_REG_UVOV, which also disables the pausing of automatic measurements. For further information
about voltage monitoring, please see DA9063 Voltage Monitoring [2].
Note
Voltage monitoring function cannot be used for any LDO in bypass mode.
6.13.4.4 A4 and A5: Manual Measurement T_J and V_BBAT
The 10-bit result of manual measurements is stored in the registers ADC_RES_L and ADC_RES_H.
Channel 4 (T_J) is used to measure the output of the internal temperature sensor (generated from a
proportional to absolute temperature (PTAT) current using a bandgap reference circuit). The ADC
measurement result and the T_OFFSET value can be used by the host to calculate the internal
junction temperature, defined by the following formula:
T_J [°C] = -0.398 * (ADC - T_OFFSET) + 330
Channel 5 can be used to measure the voltage of the backup battery.
Manual measurements on A8 to A10 are possible, but require disabling the automatic measurements
on these channels and also ensuring that only one regulator is connected to each of these ADC
channels.
NOTE
The T_OFFSET value is stored in the T_OFFSET register at address 0x104 during manufacture.
6.13.5 Fixed Threshold Comparator
A comparator with a threshold of 1.2 V is connected to the input of ADC channel 2. The comparator
is asserted when the input voltage exceeds or drops below 1.2 V for at least 10 ms (debouncing).
After being enabled via COMP1V2_EN, the status flag COMP1V2 indicates the actual state and a
maskable interrupt request E_COMP1V2 is generated at the falling and rising edge state transitions.
The comparator may be disabled via COMP1V2_EN when auto-measurements with high resolution
are executed on ADCIN2.
Datasheet
CFR0011-120-00
DA9063_2v1
108 of 219
23-Mar-2017
© 2017 Dialog Semiconductor