AS3701 datasheet(36/110 Pages) AMSOSRAM

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ams Datasheet

Page 35

[v1-11] 2016-Dec-14

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AS3701 − Detailed Description – System Functions

Figure 41:

Start-Up Flowchart

Start-Up

Batter y or Charger insertion

1. VS UP > VPOR

2. Readout ROM fuse

auto_off = 1

POWER OFF state

Quiescent curr ent ~1uA

on_input = 1 (level det)

(debo unce time = 20ms)

OR C harger insertio n

(ch g_pwr_off_en=0 (level det))

(ch g_pwr_off_en=1 (edge det))

auto_off = 1 OR

power_off_at_vsuplow = 1

VSUP debounce state

Measuring V SUP

Quiesent cur rent <30uA

VSUP>ResVoltRise

fo r more than 5ms

on_input = 1 (level det)

OR ChDet = 1

VSUP < ResVoltFall

fo r more than 500ms

power_off = 1 OR

(VSUP<ResVoltFall &&

power_off_at_vsuplow=1)

Reset all Registers

Switch off Regulators

reset r egister s and reload OTP

registers expect:

pwr_off_at_vsupl ow

RUN startup sequence

regulator star tup sequence

star tup delay program mable

General Settings pr ogramm able

RESET Timer

regulator star tup executed

waiti ng tim e t o rel ease XRES pin

10..150ms

ACTIVE state

XRES = 1

(OSC alway s on)

standby_mod e_on = 1

OR GP IOx = 1 if gpiox_iosf = 6

(edge det)

OFF delay

wait off_delay

STAND-BY state

al l regulators wi th

sdX_stby_on = 1 or

ldoX_stby_on = 1 enabled

(OSC is off, if sdX_stby_on = 0)

any

Interru pt app lied O R

on_input = 1 (level det)

(debo unce time = 20ms)

power_off = 1 OR

fo rce_reset = 1 OR

(XRES is lo w &&

stdby_reset_disable = 1) OR

VSUP<ResVoltFall

Die temp > 140°C

(tco_140_a = 1)

power_off = 1 OR

fo rce_reset = 1 OR

XRES is lo w O R

VSUP<ResVoltFall OR

ON lon g-press (edge det)

Die temp > 110°C

(tco_110_a = 1)

any state

OFF delay

off_delay = 8ms

OFF delay

wait off_delay

OFF delay

off_delay = 8ms

OFF delay

wait off_delay

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