SN8P2200 Series
USB 1.1 Low-Speed 8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 41
Version 1.7
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.
VDD
VSS
VDD
VSS
Watchdog Normal Run
Watchdog Stop
System Normal Run
System Stop
LVD Detect Level
External Reset
Low Detect
External Reset
High Detect
Watchdog
Overflow
Watchdog
Reset Delay
Time
External
Reset Delay
Time
Power On
Delay Time
Power
External Reset
Watchdog Reset
System Status