AS3722 datasheet(58/199 Pages) AMSOSRAM

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ams Datasheet

Page 57

[v1-01] 2015-Sep-07

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AS3722 − Detailed Descriptions- System Functions

Figure 55:

Regulator Power-Down Sequence

Regulator Power-Down Sequence: Shows timing relationships of the regulators and corresponding control

signals during power-down

0msec(If Reg17_delay=0)

1msec(If Reg17_delay=1 and del_time=0)

4msec(If Reg17_delay=1 and del_time=1)

regulator power down

Reg16_select<4:0>

sd/ldoX_sequ_on=1

Reg17_select<4:0>

sd/ldoX_sequ_on=1

...

CLK32k pin enabled

XRES_OUT

Power down sequence controlled

I2C/SPI controlled

Start power down

sequence, by

I2C/SPI, Reset or

Power down

LDOs with

ldoX_sequ_on=0

DCDCs with

sdX_sequ_on=0

Reg1_select<4:0>

sd/ldoX_sequ_on=1

Reg0_select<4:0>

sd/ldoX_sequ_on=1

0msec(If Reg1_delay=0)

1msec(If Reg1_delay=1 and del_time=0)

4msec(If Reg1_delay=1 and del_time=1)

All (other) LDOs/DCDCs

sd/ldoX_sequ_on=1

off_delay (0..32msec)

RESET or POWER off

Clk32 pin shutdown at reset

0msec(If Reg16_delay=0)

1msec(If Reg16_delay=1 and del_time=0)

4msec(If Reg16_delay=1 and del_time=1)

0msec(If Reg2_delay=0)

1msec(If Reg2_delay=1 and del_time=0)

4msec(If Reg2_delay=1 and del_time=1)

0msec(If Reg0_delay=0)

1msec(If Reg0_delay=1 and del_time=0)

4msec(If Reg0_delay=1 and del_time=1)

reset all registers

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