DP83826I: power up timing

Kai Nomiyama

Part Number: DP83826I
Other Parts Discussed in Thread: DP83826EVM

Hi Team,

I have a question about DP83826 power up timing.

Does DP83826 support simultaneous VDDIO3V3 and VDDA3V3 turn up?

DP83826 datasheet power up timing describes T2 as "Supply Sequencing VDDA3V3 followed by VDDIO or VDDIO followed by VDDA3V3 ".

T2 in Figure 8-1 looks starting from end of T1 but DP83826EVM VDDIO3V3 and VDDA3V3 are turned on at the same time so I think T2 starting time should be beginning of T1.

Regards,
Kai

over 4 years ago

0 Kallikuppa Sreenivasa over 4 years ago

TI__Guru**** 207080 points

Hello Kai Nomiyama,

Thank you for the query.

Please refer to the T2 value.

The T2 in figure 8.1 is representational.

Regards,

Sreenivasa

0 Kai Nomiyama over 4 years ago in reply to Kallikuppa Sreenivasa

TI__Expert 5675 points

Hi Sreenivasa,

I know that power up timing but what I'd like to know is the start timing of T2.

does DP83826 support simultaneous VDDIO3V3 and VDDA3V3 turn up?

From figure8.1, it looks T2 starts from end of T1.

Regards,

Kai

+1 Kallikuppa Sreenivasa over 4 years ago in reply to Kai Nomiyama

TI__Guru**** 207080 points

Hello Kai,

Thank you for the reply.

Based on the above table DP83826 support simultaneous VDDIO3V3 and VDDA3V3 turn up. The T2 is representational and are not to b scaled.

Thanks,

Sreenivasa

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DP83826I: power up timing