DS90UB954-Q1: Power up sequence T0 and T2

James Zhan

Part Number: DS90UB954-Q1

Hi team,

On the datasheet of UB954 power sequence section, the T0, T2, T4, T6 min value is 0.

Could you help to advise what's the recommend time for T0, T2, T4, T6?

Thanks.

0 Hamzeh Jaradat over 4 years ago

Hello James,

The is no recommended delay time. The requirement is to have them as following:

First VDD18, then VDDIO can also at the same time rise or with slight delay.

After that VDD11 can start rising once VDD18 and VDDIO have complete rising.

Once all supply rails, i.e. VDD18, VDDIO and VDD11 are high and stable, then PDB can start rising.

Interface forum