Intel® Quartus® Prime Standard Edition User Guide: Debug Tools

ID 683552
Date 9/24/2018
Document Table of Contents

4.1.4. Add Registers Between Pipeline Paths and Signal Probe Pins

You can specify the number of registers placed between a Signal Probe source and a Signal Probe pin. The registers synchronize data to a clock and control the latency of the Signal Probe outputs. The Signal Probe feature automatically inserts the number of registers specified into the Signal Probe path.

The figure shows a single register between the Signal Probe source Reg_b_1 and Signal Probe Signal Probe_Output_2 output pin added to synchronize the data between the two Signal Probe output pins.

Note: When you add a register to a Signal Probe pin, the Signal Probe compilation attempts to place the register to best meet timing requirements. You can place Signal Probe registers either near the Signal Probe source to meet fMAX requirements, or near the I/O to meet tCO requirements.
Figure 34. Synchronizing Signal Probe Outputs with a Signal Probe Register

In addition to clock input for pipeline registers, you can also specify a reset signal pin for pipeline registers. To specify a reset pin for pipeline registers, use the Tcl command make_sp.