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Answers to Top FAQs
1. Signal Integrity Analysis with Third-Party Tools
2. Reviewing Printed Circuit Board Schematics with the Quartus® Prime Software
3. Siemens EDA PCB Design Tools Support
4. Cadence Board Design Tools Support
5. Quartus® Prime Pro Edition User Guide: PCB Design Tools Document Archives
A. Quartus® Prime Pro Edition User Guides
1.4.1. IBIS Model Access and Customization Flows
1.4.2. Elements of an IBIS Model
1.4.3. Customizing IBIS Models
1.4.4. Design Simulation Using the Siemens EDA HyperLynx* Software
1.4.5. Configuring LineSim to Use Intel IBIS Models
1.4.6. Integrating Intel IBIS Models into LineSim Simulations
1.4.7. Running and Interpreting LineSim Simulations
1.5.1. Supported Devices and Signaling
1.5.2. Accessing HSPICE Simulation Kits
1.5.3. The Double Counting Problem in HSPICE Simulations
1.5.4. HSPICE Writer Tool Flow
1.5.5. Running an HSPICE Simulation
1.5.6. Interpreting the Results of an Output Simulation
1.5.7. Interpreting the Results of an Input Simulation
1.5.8. Viewing and Interpreting Tabular Simulation Results
1.5.9. Viewing Graphical Simulation Results
1.5.10. Making Design Adjustments Based on HSPICE Simulations
1.5.11. Sample Input for I/O HSPICE Simulation Deck
1.5.12. Sample Output for I/O HSPICE Simulation Deck
1.5.13. Advanced Topics
1.5.12.1. Header Comment
1.5.12.2. Simulation Conditions
1.5.12.3. Simulation Options
1.5.12.4. Constant Definition
Constant Definition Block
1.5.12.5. I/O Buffer Netlist
1.5.12.6. Drive Strength
1.5.12.7. Slew Rate and Delay Chain
1.5.12.8. I/O Buffer Instantiation
1.5.12.9. Board and Trace Termination
1.5.12.10. Double-Counting Compensation Circuitry
1.5.12.11. Simulation Analysis
2.1. Reviewing Quartus® Prime Software Settings
2.2. Reviewing Device Pin-Out Information in the Fitter Report
2.3. Reviewing Compilation Error and Warning Messages
2.4. Using Additional Quartus® Prime Software Features
2.5. Using Additional Quartus® Prime Software Tools
2.6. Reviewing Printed Circuit Board Schematics with the Quartus® Prime Software Revision History
4.1. Cadence PCB Design Tools Support
4.2. Product Comparison
4.3. FPGA-to-PCB Design Flow
4.4. Setting Up the Quartus® Prime Software
4.5. FPGA-to-Board Integration with the Cadence Allegro Design Entry HDL Software
4.6. FPGA-to-Board Integration with Cadence Allegro Design Entry CIS Software
4.7. Cadence Board Design Tools Support Revision History
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1.5.12.4. Constant Definition
The constant definition block of the output simulation SPICE deck instantiates the voltage sources that controls the configuration modes of the I/O buffer.
Constant Definition Block
* Constant Definition voeb oeb 0 0 * Set to 0 to enable buffer output vopdrain opdrain 0 0 * Set to vc to enable open drain vrambh rambh 0 0 * Set to vc to enable bus hold vrpullup rpullup 0 0 * Set to vc to enable weak pullup vpci rpci 0 0 * Set to vc to enable pci mode vpcdp4 rpcdp4 0 rp4 * These control bits set the IO standard vpcdp3 rpcdp3 0 rp3 vpcdp2 rpcdp2 0 rp2 vpcdp1 rpcdp1 0 rp1 vpcdp0 rpcdp0 0 rp0 vpcdn4 rpcdn4 0 rn4 vpcdn3 rpcdn3 0 rn3 vpcdn2 rpcdn2 0 rn2 vpcdn1 rpcdn1 0 rn1 vpcdn0 rpcdn0 0 rn0 vdin din 0 pulse(0 vc 0s 0.2ns 0.2ns 8.5ns 17.4ns)
Where:
- Voltage source voeb controls the output enable of the buffer.
- vopdrain controls the open drain mode for the I/O.
- vrambh controls the bus hold circuitry in the I/O.
- vrpullup controls the weak pullup.
- vpci controls the PCI clamp.
- The next ten voltage sources control the I/O standard of the buffer and are configured through a later library call.
- vdin is connected to the data input of the I/O buffer.
- The edge rate of the input stimulus is automatically set to the correct value by the Quartus® Prime software.