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1.6.1. Initial Stackup Entry
1.6.2. Using the Correct Number of Power/Ground Via Pairs
1.6.3. Using the Correct Number of Power/Ground Via Pairs and Layer Number
1.6.4. Corrected Number of Power/Ground Via Pairs and Layer Numbers
1.6.5. Moving Supplies to Optimal Layers
1.6.6. Moving Power and Ground Planes Closer Together
1.6.7. Move Decoupling Capacitors to the Top Surface of the PCB
1.6.8. Using X2Y Decoupling Capacitors
1.6.9. Using Ultra–Low ESR Bulk Capacitors
1.6.10. Swapping VCC on Layer 9 with VCC, VCCT_GXB, and VCCR_GXB on Layer 4
1.6.11. Assessing How Much Total Capacitance Might be Required
1.6.12. Using the Core Clock Frequency and Current Ramp Up Period Parameters
1.6.13. Overall Design Study Capacitor Savings
1.6.14. Overall Summary
1.6.15. References
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1.3.3. GPIO
General Purpose IO (GPIO) current requirements are dependent on the IO standard, drive strength, termination use, frequency and toggle rate. Altera recommends using accurate IO standard settings in your estimations.