SN8F2280 Series
USB 2.0 Full-Speed 8-Bit Micro-Controller
Finishing any reset sequence needs some time. The system provides complete procedures to make the power on reset
successful. For different oscillator types, the reset time is different. That causes the VDD rise rate and start-up time of
different oscillator is not fixed. RC type oscillator’s start-up time is very short, but the crystal type is longer. Under client
terminal application, users have to take care the power on reset time for the master terminal requirement. The reset
timing diagram is as following.
LVD Detect Level
VDD
VSS
Power
External Reset
Watchdog Reset
System Status
VDD
VSS
External Reset
High Detect
External Reset
Low Detect
Watchdog
Overflow
Watchdog Normal Run
Watchdog Stop
System Normal Run
System Stop
Power On
Delay Time
External
Reset Delay
Time
Watchdog
Reset Delay
Time
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