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SiFive has launched the S2 Core IP Series at the Linley Spring Processor Conference in Santa Clara. The S2 Core IP Series is a 64-bit addition to SiFive’s 2 Series Core IP and brings advanced features to SiFive’s smallest microcontrollers.

The S2 Series further adds to SiFive’s extensive silicon-proven, embedded core IP portfolio. It comprises the 2, 3, 5, and 7 Core IP Series in E (32-bit) and S (64-bit) variants.

The S2 is said to enable SoCs to have an always-on low power CPU that can be combined with high-performance CPUs that switch on only when applications demand performance, such as in voice-activated smart devices. The 2 Series can be configured to be as small as just 13,500 gates (in RV32E form).

The S2 is just half the size of a similarly configured S5 core. Security is enhanced by separation between secure and non-secure domains.

The company will make available the S2 Series as a customizable Core IP Series as well as in the form of standard cores.

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