IntermediateTopic 54 of 104Electronics & Embedded

ASIC design flow

RTL, synthesis, place and route, verification and tape-out.

In depth

RTL design, functional verification, synthesis, floorplan, place and route, timing and power sign-off, physical verification (DRC/LVS), tape-out, fabrication, testing. Costs and turnaround are high so verification is critical. Process nodes from 180 nm to 3 nm.

Key points

  • Design rules
  • Mask sets are expensive
  • Yield
Example

A smartphone SoC takes years from RTL to production.

Why it matters

The ASIC flow is how custom chips are made, and understanding it helps you plan costs, schedules and verification effort.

Where this is used

  • Taking a new radio chip from RTL design to manufacture.
  • Estimating the non-recurring cost of a custom sensor chip.
  • Planning verification before tape-out to avoid expensive respins.

Frequently asked questions

What is ASIC design flow?

RTL, synthesis, place and route, verification and tape-out.

Why is it important to understand ASIC design flow?

The ASIC flow is how custom chips are made, and understanding it helps you plan costs, schedules and verification effort.

What is RTL?

Register transfer level code that describes the registers and logic between them, which is the input to synthesis.

Why is verification so important in ASIC design?

A mistake found after fabrication requires a new mask set, which costs a great deal of money and time.

How is ASIC design flow used in practice?

Typical applications include taking a new radio chip from RTL design to manufacture, estimating the non-recurring cost of a custom sensor chip and planning verification before tape-out to avoid expensive respins.

What should I learn before ASIC design flow?

Study "FPGA" first (topic 53 of 104 in Electronics & Embedded). It covers the groundwork this topic builds on.

What are the key points of ASIC design flow?

Design rules. Mask sets are expensive. Yield.

Can you give an example of ASIC design flow?

A smartphone SoC takes years from RTL to production.

What comes after ASIC design flow?

The next topic is "Microprocessor vs microcontroller", which builds directly on this one.

How difficult is ASIC design flow?

It is classed as Intermediate in Electronics & Embedded (topic 54 of 104). It is an intermediate topic. Work through the beginner topics in Electronics & Embedded first.

Learning path

Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.

Related topics