AS3701 datasheet(41/110 Pages) AMSOSRAM

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[v1-11] 2016-Dec-14

AS3701 − Detailed Description – System Functions

Long ON-Key Press

For a reset initiated 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 reset gets

initiated, if the bit onkey_lpress_reset [ReferenceControl] is set

to “1”. This is thought as a safety feature when the SW hangs up.

A long ON key reset is just possible, if the ON key works as a

push-button (on_tast_sw [ReferenceControl] is set to “0”)

Figure 48:

ON-Key Long Press RESET Behavior

Overtemperature Reset

A reset cycle is getting started, if the overtemperature

threshold is reached and the bit ov_temp_140

[OvertemperatureControl] is set.

Parameter

Figure 49:

XRES Input Characteristics

onkey_

lpress_en

onkey_

lpress_reset

on_

lpress_

delay

on_tast_sw

Long Press Behavior

No ON-key long press reset possible

8s long press on the ON-push-button

forces a reset

4s long press on the ON-push- button

forces a reset

No reset possible, if ON-key works as a

switch

Symbol

Parameter

Note

Min

Typ

Max

Unit

VXRES_IL

RESET low level voltage

0.4

VXRES_IH

RESET high level voltage

1.4

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