Successful First Silicon of Raven: An Open-Source RISC-V Microcontroller

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Using these proven IP blocks increases reliability while minimizing first-silicon risk, thus maintaining the commitment to open-source semiconductor development

X-FAB Silicon Foundries, the leading analog/mixed-signal and specialty foundry, together with crowd-sourcing IC platform partner Efabless Corporation, has announced the successful first-silicon availability of the Efabless RISC-V System on Chip (SoC) reference design.

The mixed-signal SoC, called Raven, is based on the community developed ultra-low power PicoRV32 RISC-V core. Efabless has successfully bench-tested the Raven at 100MHz, and based on simulations the design should be able to operate at up to 150MHz.

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Raven is unique in that the open-source top-level design utilizes X-FAB proprietary analog IP and is created with an open-source design flow. This hybrid open-source design brings the power of open innovation and at the same time protecting significant investment in proprietary IP.

Efabless and X-FAB chose to manufacture the Raven on X-FAB’s high-reliability XH018 process. This is a flexible 180nm 6-metal process with a wide variety of options including a low power option, on-chip isolation for high voltages, and high-temperature flash memory. X-FAB’s XH018 process meets automotive quality requirements and is popular in a wide range of automotive, industrial and medical applications.

Availability

Design kits and PDKs for open source IP designs are available. Raven is available from the Efabless marketplace as a reference design without license fee consequentially advancing the Efabless open innovation model of community design.

Check here for additional details on XH018

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