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RX8801 SA / JE
Page - 26 ETM26E-03
8.7. Backup and Recovery
V
DD
t
F
t
R2
Back up
t
R1
V
CLK
0 V
V
DET
Item Symbol Condition Min. Typ. Max. Unit.
Power supply
detection voltage ( 1 )
V
DET
2.2 V
Power supply
detection voltage ( 2 )
V
LOW
1.6 V
Power supply
drop time
t
F
2
μs /V
Initial power-up time t R1
10
ms /V
1.6V VDD 3.6V
5
μs /V
Clock maintenance
power-up time
t
R2
1.6V
VDD > 3.6V
15
μs /V