QuickLogic FPGA Power Consumption Optimization.

[hexbetac]

Hi everyone,
I'm currently working on a project utilizing a QuickLogic FPGA and I'm trying to minimize power consumption as much as possible. I've been reviewing the documentation, but I'm hoping to get some practical advice from the community.
Specifically, I'm interested in strategies for reducing power consumption in the following areas:
* **Clock Gating:** What are the best practices for implementing clock gating in QuickLogic FPGAs? Are there specific IP cores or techniques that are particularly effective?
* **Voltage Scaling:** Does QuickLogic offer different voltage scaling options? What are the trade-offs between performance and power consumption for each voltage level?
* **Resource Utilization:** How does resource utilization (e.g., logic cells, registers) impact power consumption? Are there any guidelines for optimizing resource usage to minimize power?
* **Sleep Modes:** I'm looking to implement sleep modes to further reduce power consumption when the FPGA is idle. Can anyone share their experiences with implementing sleep modes in QuickLogic FPGAs? Are there any specific considerations or challenges I should be aware of?
* **Tool Settings:** Are there specific settings in the QuickLogic development tools that can help optimize power consumption?
Any insights, tips, or examples would be greatly appreciated. Thanks in advance for your help! I'm currently using the EOS S3 platform for my development..

[jessiepittman]

Hi everyone,
I'm currently working on a project utilizing a QuickLogic FPGA and I'm trying to minimize power consumption as much as possible. I've been reviewing the documentation, but I'm hoping to get some practical advice from the community.
Specifically, I'm interested in strategies for reducing power consumption in the following areas:
* **Clock Gating:** What are the best practices for implementing clock gating in QuickLogic FPGAs? Are there specific IP cores or techniques that are particularly effective?
* **Voltage Scaling:** Does QuickLogic offer different voltage scaling options? What are the trade-offs between performance and power consumption for each voltage level?
* **Resource Utilization:** How does resource utilization (e.g., logic cells, registers) impact power consumption? Are there any guidelines for optimizing resource usage to minimize power?
* **Sleep Modes:** I'm looking to implement sleep modes to further reduce power consumption when the FPGA is idle. Can anyone share their experiences with implementing sleep modes in QuickLogic FPGAs? Are there any specific considerations or challenges I should be aware of? tung sahur clicker
* **Tool Settings:** Are there specific settings in the QuickLogic development tools that can help optimize power consumption?
Any insights, tips, or examples would be greatly appreciated. Thanks in advance for your help! I'm currently using the EOS S3 platform for my development..

Thanks for sharing your questions. If you're targeting the EOS S3, one thing that's made a noticeable difference for us is reducing unnecessary clock activity first, since dynamic power is often the biggest contributor. Also, try to minimize high-frequency toggling on signals that don't need to run continuously.
Another recommendation is to use the power estimation reports from the synthesis/place-and-route tools after each major design change. They can help identify which modules consume the most power before moving to hardware testing.
For sleep modes, it's worth measuring both the transition latency and the wake-up energy. In some applications with frequent wake/sleep cycles, the overhead can offset the expected power savings.
I'm also interested in hearing if anyone has compared different EOS S3 configurations or has real-world measurements showing which optimization techniques provided the biggest power reduction.

[cliffordkirby]

Great discussion! I’m also interested in practical power-saving techniques for the EOS S3 platform. Clock gating and sleep modes seem especially useful for reducing power during idle periods, while careful resource utilization could help keep overall consumption under control. I’d be interested to hear which QuickLogic tool settings and optimization strategies have made the biggest difference in real-world projects.

[Robert]

Great topic! A few things that have made a real difference for us on EOS S3 projects:

Bypassing the onboard LDOs and feeding the 1.1V core rail externally — the datasheet spec's the core at 1.1V and explicitly supports this as one of three power configurations (dual LDO, single LDO, or external supply). Worth it as your DC/DC external rail is more efficient than the onboard LDO's dropout.
Power gating anything unused: the S3 has ~31 independently controllable power islands, so gating off FPGA fabric and SRAM banks you're not using adds up fast.
SRAM clocks are auto-gated in hardware when idle, but it's worth building out a proper clock plan on top of that — Dynamic Frequency Scaling (DFS) in the QORC SDK lets you define policy nodes so HSOSC and peripheral clocks scale down as CPU load drops instead of sitting at a fixed high frequency.
On the tooling side, the QORC SDK includes an FSM code generator (fsmgen) that ties application-level events directly to DFS policy nodes and the tickless-idle low-power sleep modes — so state changes (like "LPSD on") automatically drive the right clock/sleep behavior instead of hand-coding it. I am working on a video walkthrough and will keep you updated.