BU26156RFS Datasheet, PDF (14/95 Pages) Rohm – Monoraul MIC Input with ALC

BU26156RFS
Datasheet
Power Supply Sequence
Please power on/off the LSI with all kind of power at the same time.
Each power supply should power up/down in 50ms.Also keep all power supply in the ON state or the OFF state.
Please avoid partial ON or partial OFF states.Don’t have to keep the sequence of power on/off
Please keep RESETB pin “L” level until all power supply become ON state. The CPU I/F available when all power supply
are powered on, exceed tW_PURST, RESET are disabled and exceed tW_{_REGU}. It is regardless that turn of power on and off
of IOVDD and HVDD.
Parameter
Symbol Min Typ Max Unit
Power On Delay Time
t_{VDD_ON}
0
Power Down Delay Time
t_{VDD_OFF}
0
Reset Time after Power ON
t_{w_PURST}
1
Wait time for Regulator starting after reset
release
t_{w_REGU}
1
- 50 ms
- 50 ms
-
- µs
-
- ms
IOVDD
Power
supply
Other
Power
supply
REGOUT
RESETB
CPU I/F
STATUS
PowerSupply*0.9
tVDD_ON
PowerSupply*0.9
tW_PURST tW_REGU
PowerSupply*0.1
tVDD_OFF
PowerSupply*0.1
not available
VDD OFF
available
PowerDown
Wait
Regulator
Operation
Figure 12.
not available
VDD OFF
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TSZ22111・15・001
14/92
TSZ02201-0V1V0E502570-1-2
Jul.1.2014 Rev.001