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DP83TG720S-Q1: power up timing

Part Number: DP83TG720S-Q1

Hi Expert,

Here are questions about DP83TG720S and DP83TC812S power-up stabilization.

As specified in datasheet,  720S needs MIN. 65ms stabilization time and 812s needs MIN. 10ms.

Questions: 

1, Does that mean software need wait such a long time to start register access after chip is powered on? Especially for 720s, it is more than 65ms?

2, In customer design, there is a 10ms delay time from power-on stability to RESET release, how much waiting time is needed after RESET release and before registers can be accessed? Take 720s as example. 

720s:

812s:

Thanks!

Ethan Wen