DA9062 datasheet(35/101 Pages) RENESAS

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DA9062

PMIC for Applications Requiring up to 8.5 A

Datasheet

Revision 3.8

15-Feb-2022

CFR0011-120-00

35 of 99

Functional Description

8.1

Control Signals

Each of the input signals described below feature a debounce filter. They share a common debounce

time control (DEBOUNCING).

8.1.1

nONKEY

nONKEY is an edge-sensitive signal that controls the power mode of DA9062. Both falling and rising

edges are detected and the time between the edges is measured. This enables different lengths of

key press detection. The detection circuitry is enabled in all power modes of the device.

The status of the signal after debouncing can be read from NONKEY (register STATUS_A). The

mask bit M_NONKEY prevents interrupt and wakeup events that would normally be caused by an

nONKEY event.

nONKEY has four modes of operation, see Table 23, which can be selected by NONKEY_PIN.

NONKEY_LOCK controls the wakeup event generation of the nONKEY. If NONKEY_LOCK is

asserted (depends on NONKEY_PIN), a short nONKEY press (shorter than KEY_DELAY) will not

generate a wakeup.

Table 23: nONKEY Functions

NONKEY_PIN

Function

An event (E_nONKEY) is generated when nONKEY is asserted. If not masked, the event

causes an interrupt. A wakeup is triggered if the device is in POWERDOWN mode.

A timer is started when nONKEY is asserted. If the signal is de-asserted before the time

programmed in KEY_DELAY, an event (E_nONKEY) is generated at the rising edge. If the

signal stays asserted and the timer reaches the programmed value, an event is generated and

nONKEY_LOCK is asserted.

A timer is started when nONKEY is asserted. If the signal is de-asserted before the time

programmed in KEY_DELAY, an event (E_nONKEY) is generated at the rising edge. If the

signal stays asserted and the timer reaches the programmed value, an event is generated,

nONKEY_LOCK is asserted, and a power-down sequence is triggered by automatically

clearing SYSTEM_EN.

A timer is started when nONKEY is asserted. If the signal is de-asserted before the time

programmed in KEY_DELAY, an event (E_nONKEY) is generated at the rising edge,

SYSTEM_EN is cleared, and STANDBY is asserted. If the signal stays asserted and the timer

reaches the programmed value, an event is generated, nONKEY_LOCK is asserted, and

SYSTEM_EN and STANDBY are cleared.

Whenever nONKEY_LOCK is asserted, a long key press (longer than the time programmed in

KEY_DELAY) is required to wakeup from POWERDOWN mode. If the wakeup is also desired after a

short key press, nONKEY_LOCK has to be cleared before entering the POWERDOWN mode.

8.1.2

nRESETREQ

nRESETREQ is an active-low reset request that causes DA9062 to enter RESET mode. The

transition to the RESET mode is handled by the power sequencer and it can be sped up by setting

the HOST_SD_MODE bit. Before entering the RESET mode, a fault log bit is set (nRESETREQ) and

nRESET is asserted.

nRESETREQ should be tied to an always-on rail that is supplied in all modes of the DA9062 such as

VSYS. It is not recommended to tie nRESETREQ to any of the regulator outputs.

DA9062 Datasheet(PDF) 35 Page - Renesas Technology Corp

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