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Visitor
Visitor
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Registered: ‎12-17-2019

VCCAUX_IO for Kintex-7

To whom it may concern,

I am using the XC7K160T FFG676, I am using bank 32, 33 and 34 for DDR3 SDRAM (1.5V) and planning to operate at 1.8Gbps.  I have following question.

1. Should I connect VCCAUX_IO_G (P8, R9 and T8)  to 1.8V?

2. Should I apply 2.0V on VCCAUX_IO_G (P8, R9 and T8) to achieve higher frequency performance?

3. Does VCCAUX_IO_G (P8, R9 and T8) are connected internally? Which mean the voltage of I/O circuitry of bank 32, 33 and 34 are going to be the same?

Thanks

 

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Teacher
Teacher
283 Views
Registered: ‎07-09-2009

2) If you go outside the voltage spec, your on your own.
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186 Views
Registered: ‎08-05-2019

Hi,

you have to give supply from external.

Use 1.8V supply.

Check you are using DDR3L or DDR3 memory chip based on - same use 1.35V or 1.5V as Bank Supply for 34,35.

Please refer a schematics of spartan 7.

Please read UG586 pages - 102.

If possible use pinout through VIVADO - explained in UG586.

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