AS3722 datasheet(62/199 Pages) AMSOSRAM

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ams Datasheet

Page 61

[v1-01] 2015-Sep-07

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AS3722 − Detailed Descriptions- System Functions

Figure 59:

Regulator Stand-By Entry Sequence

Regulator Stand-By Entry Sequence: Shows timing relationships of the regulators and corresponding control

signals during entering stand-by mode

regulator stand_by entry

Reg0_select_stby<4:0>

...

CLK32k pin enabled

XRES_OUT

Power down sequence controlled

I2C/SPI controlled

0msec(If Reg1_delay_stby=0)

1msec(If Reg1_delay_stby=1 and delay_time_stby=0)

4msec(If Reg1_delay_stby=1 and delay_time_stby=1)

0msec(If Reg0_delay_stby=0)

1msec(If Reg0_delay_stby=1 and delay_time_stby=0)

4msec(If Reg0_delay_stby=1 and delay_time_stby=1)

All (other) LDOs/DCDCs

still active

off_delay (0..32msec) only if enable1_stby_en=0

if enable2_enable=1

ENABLE2

SD0

Stand-by start

0msec(If Reg8_delay_stby=0)

1msec(If Reg8_delay_stby=1 and del_time_stby=0)

4msec(If Reg8_delay_stby=1 and del_time_stby=1)

sd/ldoX_stby_on=1

Reg1_select_stby<4:0>

Reg8_select_stby<4:0>

Reg9_select_stby<4:0>

low if stby_reset_enable=1

0msec(If Reg5_delay_stby=0)

1msec(If Reg5_delay_stby=1 and delay_time_stby=0)

4msec(If Reg5_delay_stby=1 and delay_time_stby=1)

0msec(If Reg9_delay_stby=0)

1msec(If Reg9_delay_stby=1 and del_time_stby=0)

4msec(If Reg9_delay_stby=1 and del_time_stby=1)

via SPI/I2C if standby_mode_on=1

via GPIO if gpioX_iosf = 5 and GPIOx going HIGH

via ENABLE1 (going LOW) if enable1_deepsleep=1

sd/ldoX_stby_on=0

Reg0_voltage_stby>0

sd/ldoX_stby_on=0

sd/ldoX_stby_on=1

AS3722 Datasheet(PDF) 62 Page - ams-OSRAM AG

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