The round brings the total raised by the company to $7.5m.
The company will use the money to fund further expansion as it takes its UltraDebug technology to market, licensing it to major semiconductor companies.
UltraDebug detects software and hardware bugs and can be used for optimisation capabilities for memory interfaces and system fabrics. The technology is expected to be rolled out in silicon chips in the latter part of 2013.
Octopus principal Luke Hakes said, “UltraSoC has developed an impressive product created by their world class engineering team that addresses the growing need in the semiconductor industry for advanced debug solutions.
“With companies developing increasingly sophisticated electronic devices, UltraSoC’s debug solution can play a critical role in validating the technology and optimising the performance of these devices bring significant advantages to its customers.
“The opportunity is huge and the technology has the potential to support the industry as it continues to innovate and deliver the next generation of electronic devices.”
Last month Octopus backed a €5m competition for startups building enterprise cloud applications alongside fellow venture firms MMC Ventures and Notion Capital.
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