Embedded Design Handbook

ID 683689
Date 8/28/2023
Public
Document Table of Contents

6.3.1.4.2. Logic Analyzer Interface

The Intel® Quartus® Prime Logic Analyzer Interface is a JTAG programmable method of driving multiple time-domain multiplexed signals to pins for external verification. Because the Logical Analyzer Interface multiplexes pins, it minimizes the pincount requirement. Groups of signals are assigned to a bank. Using JTAG as a communication channel, you can switch between banks.

You should use this approach when Signal Tap II embedded logic analyzer is insufficient for your verification needs. Some external logic analyzer manufacturers support the Logic Analyzer Interface. These logic analyzers have various amounts of support. The most important feature is the ability to let the measurement tools cycle through the signal banks automatically.

The ability to cycle through signal banks is not limited to logic analyzers. You can use it for any external measurement tool. Some developers use low speed indicators, for example LEDs, for verification. You can use the Logic Analyzer interface to map many banks of signals to a small number of verification LEDs. You may wish to leave this form of verification in your final design so that your product is capable of creating low-level error codes after deployment.

To learn more about the Intel® Quartus® Prime Logic Analyzer Interface, refer to the In-System Debugging Using External Logic Analyzers chapter in the Intel® Quartus® Prime Handbook Volume 3: Verification.