AS3715 datasheet(56/159 Pages) AMSOSRAM

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[v1-03] 2015-Aug-10

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AS3715 − Detailed Description – System Functions

Start-Up

Figure 56:

Start-Up Flow Chart

Start-Up Flow Chart: Shows the main state transitions during start-up.

Detailed Description – System

Functions

power_of f=1 OR

(VSUP<ResVoltFall &&

power_of f_at_vsuplow) OR

(onkey_lpress_reset=0 &&

ONKEY lpress)

OFF delay

wait off_dela y

Reset all Registers

Switch off Regulators

reset registers and reloa d

fuse s 0xA0 to 0xAB

RUN startup sequence

regu lator startup sequnece GPIO

programming during seque nce

star tup de lay pro grammable

set sdX_sequ_on=1 or

ldoX_sequ_on=1 if re gulator

selecte d d uring startup

RESET Timer

regulator startup exe cuted

waiting time to re lease X RES p in

10..150ms

ACTIVE state

XRES=1

GPIOx=1

if GPIOx_iosf=6 or

standby_mode_on=1

OFF delay

wait off_dela y

Sequence Down

force o ff all re gulators

not in the sequen ce;

sequen ce down inverse to

star t-up sequence;

STAND-BY state

V2_5 stays a ctive,

all regu lato rs with

regX_stby_on=1 ena bled

any

interrupt applied or

ONKEY=1 or

ENx=1

power_of f=1

or f orce_reset=1

or (XRES is low

if stdby_reset_disable=1)

or (VSUP<ResVoltFall &&

SupResEn=1) or

Die temp>140°C or

SD4 overtemp

remove „stand-by force off “

of all regulat ors

Die

temp>140°C

power_of f=1

or f orce_reset=1

or XRES is low or

ONKEY lpress

OFF delay

wait off_dela y

die temp

>110°C

any state

Start-Up

Battery or Charge r in ser tion

1. V2_5 power up

2. Reado ut ROM fuse

auto_of f=1

POWER OFF state

V2_5 power up

Qui escent cur rent < 10uA

Pin ONKE Y

deb ounce time=20mse c

ONKEY=RISI NG OR

ENx=RISI NG OR

(chdet=1 && chg_pwr_of f_en=0)

OR (chdet_rise &&

chg_pwr_of f_en=1)

VSUP debounce state

Measuring VS UP

Qui esent current ~200uA

5ms &&

VSUP>ResVoltRise

auto_of f=1 or

power_of f_at_vsuplow=1

ONKEY=1 or

Charge det ect =1

VSUP<ResVoltFall

for more than 500ms

SD4 overtemp or

Die temp>140°C or

(VSUP<ResVoltFall &&

SupResEn=1)

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