Avoiding Metastability in Hardware Software Interface (HSI) using CDC Techniques
The Agnisys IDesignSpecTM (IDS) Suite supports clock domain crossings (CDCs) from both the software (SW) and hardware (HW) sides. Techniques used to avoid metastability as signals cross from one clock domain to another include:
- Two-Flip-Flop Synchronizer
- Mux Synchronizer
- Handshake Synchronization
– Write
– Read
– Pulse
- Custom Synchronizer
In a CDC design, one clock is either asynchronous to, or has a variable phase relation with respect to, another clock. Speed and power requirements lead to designs with multiple asynchronous clock domains employed at different I/O interfaces and data being transferred from one clock domain to another.
eBook: How Agnisys Eliminates Redundancies in Semiconductor Design, Verification, and Validation
Overcoming the weaknesses of traditional natural language specifications requires writing the specifications in a precise format rather than natural language, and making this format executable so that tools can generate as many files as possible for the design, verification, programming, validation, and documentation teams. Such a solution is available today.
Verification of modern IP and SoC designs presents several challenges. Specifications are often interpreted differently across teams, such as design...
Agnisys delivers advanced automation solutions that address some of the most complex challenges in chip development, from IP to...
If you’ve worked with Zephyr RTOS, you already know that devicetree files are a core part of how hardware...
