DA9062 datasheet(49/93 Pages) DIALOG

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DA9062

Entry level PMIC for applications requiring up to 8.5 A

Datasheet

Revision 3.2

18-Feb-2015

49 of 93

7.9.4

Wait step

One of the sequencer steps (any step greater than zero) can be configured as a wait step, in which

the sequencer stays until an event is detected in the GPI3 input, see Section 7.3.1.2.

NOTE

The E_GPI3 event has to be cleared after the power-up sequence completes. Otherwise, the wait step in the

next power-up sequence will be ineffective.

The wait step features an optional 500 ms timeout, which can be used when the wait event never

occurs. If the timeout occurs, the steps following the wait step are not executed and a shutdown

sequence to RESET mode is triggered. The shutdown reason is signalled with the WAIT_SHUT bit.

Alternatively, the wait step can be used as a configurable delay in the sequence (WAIT_MODE,

WAIT_TIME).

7.9.5

32 kHz clock output

If a GPO is used as a 32 kHz clock output see Section 7.3.2.2, the clock buffer can be

enabled/disabled in one of the sequencer steps (any step greater than zero). The clock buffer is

enabled when, during power-up, the sequencer reaches the step EN32K_STEP. Likewise, the buffer

is disabled when the sequencer reaches the step EN32K_STEP on the way down.

7.9.6

Power-down disable

The PD_DIS_STEP pointer can be used to define a step in the power-up sequence above which a

group of functions will be enabled. The functions concerned can be controlled in the PD_DIS register.

Similarly, in the power-down sequence, the same groups of functions will be disabled when the

sequencer proceeds below the PD_DIS_STEP.

7.10 Junction temperature supervision

To protect DA9062 from damage due to excessive power dissipation, the junction temperature is

continuously monitored. The monitoring is split into three temperature ranges TEMP_WARN

(125 °C), TEMP_CRIT (140 °C), and TEMP_POR (150 °C).

If the junction temperature rises above the first threshold (TEMP_WARN), the event E_TEMP is

asserted. If the event is not masked, this will issue an interrupt. This first level of temperature

supervision is intended for non-invasive temperature control, where the necessary measures for

cooling the system down are left to the host software.

If the junction temperature increases even further and crosses the second threshold (TEMP_CRIT) a

temperature error flag is issued and a shutdown sequence to RESET mode is triggered, see

Section 7.8.3. The nRESET output is asserted at the beginning of the shutdown sequence.

Therefore, the second level of the temperature supervision does not rely on the host software to take

counter-measures. The fault flag can be evaluated by the application after the next power up.

There is also a third temperature threshold (TEMP_POR) which causes DA9062 to enter RESET

mode without any sequencing and stop all functions except the RTC. This prevents possible

permanent damage due to fast temperature increases.

7.11 System supply voltage supervision

Two comparators supervise the system supply VSYS. One is monitoring the undervoltage level

(VDD_FAULT_LOWER) and the other is indicating a good system supply (VDD_FAULT_UPPER).

The VDD_FAULT_LOWER threshold is OTP configurable and can be set via the VDD_FAULT_ADJ

control from 2.5 to 3.25 V in 50 mV steps. The VDD_FAULT_UPPER level is also OTP configurable

and can be set via the VDD_HYST_ADJ control from 100 to 450 mV higher than the

VDD_FAULT_LOWER threshold.

The high-to-low transition of the VDD_FAULT_UPPER signal asserts the event E_VDD_WARN. If

the event is not masked, this will issue an interrupt, which can be used by the host processor as an

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