AS3722 datasheet(134/199 Pages) AMSOSRAM

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ams Datasheet

Page 133

[v1-01] 2015-Sep-07

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AS3722 − Register Description

Figure 135:

ResetTimer

Figure 136:

ReferenceControl

Addr:34h

ResetTimer

Bit

Bit Name

Default

Access

Bit Description

stby_reset_enable

Enable Reset output signal (pin XRES_OUT) in

standby mode

0 : No reset (XRES_OUT=1) in standby mode and

during exit of standby mode

1 : Reset is active (XRES_OUT=0) in standby mode

auto_off

RW_SS

Defines startup behavior at first battery insertion

or reset cycle

0 : Startup of chip if VBAT>ResVoltRise

1 : Enter power off mode (waiting for start-up

event e.g. ONKEY)

4:3

off_delay

Set Delay between I2C command, GPIO or Reset

signal for power_off, standby mode or reset

and execution of that command

0 : no delay

1 : 8 ms

2 : 16 ms

3 : 32 ms

1:0

res_timer

RW_SM

Set Reset Time, after the last regulator has started

0 : RESTIME = 0 ms

1 : RESTIME = 5 ms

2 : RESTIME = 11 ms

3 : RESTIME = 15 ms

Addr:35h

ReferenceControl

Bit

Bit Name

Default

Access

Bit Description

7force_softreset

RW_SM

Setting to 1 starts a soft reset cycle

Reset_out is activated and startup sequence is

executed without switching of the regulators

(voltage preset)

clk_div2

RW_SM

Divide internal clock oscillator by 2 to reduce

quiescent current for low power operation

0 : Normal mode

1 : Internal clock frequency divided by two. All

timings are increased by two. Switching frequency

of all stepdown converters are divided by two.

Reduced transient performance of stepdown

converters.

standby_mode_on

RW_SM

Setting to 1 sets the PMU into standby mode.

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