DA9062 datasheet(45/93 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

45 of 93

Current state

LS GPI

SYS_EN

PWR_EN

Freeze

Note 1

Next state

ACTIVE

SYSTEM

ACTIVE

Note 1

In this table, “Freeze” represents the result of the comparison retry count = 0.

The following events will reset the retry counter and release the state machine from the freeze state:

● De-assertion of all blocked level-sensitive wakeup conditions

● Entry to the RESET mode (over-temperature error, nRESETREQ or long press of nONKEY)

● Entry to the RTC mode (system supply error)

The freeze operation is illustrated in Figure 21. Once the freeze state is cleared, DA9062 continues

operating normally. The freeze function can be enabled in the FREEZE_EN register and the number

of retries triggering the freeze can be configured in NFREEZE.

Power mode

ACTIVE

POWERDOWN

ACTIVE

TWD_ERROR

GPI

NFREEZE

The watchdog

expires

The level sensitive

wake-up condition

is blocked

The level sensitive

wake-up condition

is de-asserted

which resets the

retry count

The retry count is

decremented and

reaches zero

The system

operates normally

upon the next

wake-up event

Retry count

Figure 21: Freeze function

7.8.5

Power-up, power-down, and shutdown sequences

The power-up, power-down, and shutdown sequences, see Figure 20, are handled by the power

supply sequencer, see Section 7.9. All power-up sequences are identical, and the power-down

sequences mirror the power-up sequences.

The shutdown sequences are also identical to the power-down sequence, but after reaching

POWERDOWN mode, the state machine automatically proceeds to RESET mode. The shutdown

sequences caused by an internal error or nRESETREQ can be sped up from the INT_SD_MODE

and HOST_SD_MODE controls: see Section 7.8.3.

7.8.6

ACTIVE mode

In the ACTIVE mode, all supplies and functions are active. The transition from POWERDOWN to

ACTIVE mode is handled by the programmable sequencer. DA9062 enters ACTIVE mode after the

sequence has completed and the watchdog is enabled (if configured to use watchdog).

Status information can be read from the host processor via the 2-wire interface and DA9062 can flag

interrupt requests to the host via a dedicated interrupt port (nIRQ).

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