Other Parts Discussed in Thread: TPS3850
Hi Experts,
Customer want to use below start up sequence of TPS3850. It is start from watchod disabled. The SET0 is connected to VDD, and SET1 is pull-down to GND in initial state.
1) Customer chage SET0 to 0, and SET1 to 1 to enable the watchdog as below. To make the timing latched and effective, is there any need to reset the VDD? Or the timing can be effective immediately without reset VDD?
2)Can SET0 and SET1 change at the same time to enable the watchdog? Datasheet shows 500us is requried between SET0 and SET1 change but customer's test results shows that SET0 and SET1 can change at the same time. Could you please help to clarify it?
3) What's the watchdog status in stage S1, S2, S3 and S4?
Arie