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Part Number: 66AK2G12
66AK2G12 Power supply.pdf
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In reply to Yordan Kovachev:
In reply to takahiko yokota:
If this understanding is correct, can I start up them at same time?
The power-up sequence is given in Section 126.96.36.199Power-UpSequence, Figure 5-3. Power-Up Sequencing: DVDD33, DVDD33_USB start first. Then on Figure 5-3 you can see that DVDD18, AVDDA_DDRPLL, AVDDA_DSSPLL,AVDDA_MAINPLL, AVDDA_NSSPLL,AVDDA_UARTPLL, AVDDA_ICSSPLL,AVDDA_ARMPLL, DVDD_DDRDLL, and VDDAHV, DVDD_DDR, and CVDD, CVDD1 start at the same time.
Power down sequence is the reverse order of the power up.
Best Regards, Yordan
I apologize but I am kind of confused. The Power-up sequence is pretty straight forward:
First you start DVDD33, DVDD3_USB. Then you start DVDD18, AVDDA_DDRPLL, AVDDA_DSSPLL,AVDDA_MAINPLL, AVDDA_NSSPLL,AVDDA_UARTPLL, AVDDA_ICSSPLL,AVDDA_ARMPLL, DVDD_DDRDLL, and VDDAHV, DVDD_DDR, and CVDD, CVDD1.
Exactly the same thing is depicted on the screenshot above.
Best Regards, Yordan
In reply to Mukul Bhatnagar:
Yokota-san is my colleague. Please let us confirm the power up sequence.
You mentioned "Then you start DVDD18, AVDDA_DDRPLL, AVDDA_DSSPLL,AVDDA_MAINPLL, AVDDA_NSSPLL,AVDDA_UARTPLL, AVDDA_ICSSPLL,AVDDA_ARMPLL, DVDD_DDRDLL, and VDDAHV, DVDD_DDR, and CVDD, CVDD1."
At this point, I believe there is no exact power up sequence requirement on these power lanes because of shaded in gray in the datasheet. Is that correct, right ? Take a look at the following red circle.
In reply to Naoki Kawada:
Sorry for the confusion.
My understanding is that they should start simultaneously, within the grey area shown in Figure 5-3 in the datasheet. They can start at the beginning or at the end of the region you point in the red circles, but I believe the power-up sequence shows that CVDD, CVDD1, DVDD_DDR and DVDD18 (along with all other listed voltages in the DVDD18 rail) start simultaneously.
Also, as Mukul noted, you can refer to the K2G ICE board
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