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[v1-11] 2016-Dec-14

AS3701 − Detailed Description – System Functions

Long ON-Key Press

For a power OFF asserted with a long ON-key press, this feature

must be enabled by setting the bit onkey_lpress_en

[ResetControl] to “1”. When applying a high level on the ON input

pin for 4s/8s (depending on on_lpress_delay [ReferenceControl])

a power off gets initiated, if the bit onkey_lpress_reset

[ReferenceControl] is set to “0”. A long ON key power off is

possible, if the ON key works as a push-button or as a switch.

Figure 52:

ON-Key Long Press Power OFF Behavior

Note(s):

1. If a USB charger adapter is connected, the ON-key push-button long press would only force a power-off, if the bit chg_pwr_off_en

is set to "1"!

2. If a USB charger adapter is connected and the bit chg_pwr_off_en is set to "0" (level detection), the ON-key-switch OFF position has

no influence. The PMIC will stay in Activemode as long as the USB adapter is present! If a USB adapter is connected and the bit chg_

pwr_off_en is set to "1" (edge detection), the PMIC can be set into Power-OFF via I²C, if the ON-key switch is also in OFF position!

Auto-OFF

If VSUP is rising from the scratch and the bit auto_off [Startup_

Control] is set to “1”, the PMIC enters immediately the

Power-OFF mode right after VSUP reaches the ResVoltRise.

If the ON-key is in switch configuration the Auto-OFF feature

only works, when the switch is in OFF position during VSUP

rising from scratch!

onkey_

lpress_en

onkey_lpress_

reset

on_reset_

delay

on_tast_sw

Long Press Behavior

No ON-key long press power OFF is

possible

8s long press on the ON-push-button

forces a power OFF (1)

4s long press on the ON-push-button

forces a power OFF (1)

Forces a power OFF after 8s, if

ON-switch is set to OFF position (2)

Forces a power OFF after 4s, if

ON-switch is set to OFF position (2)

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