SCR9 is a high-performance, silicon-proven, Linux-capable 64-bit RISC-V processor core for entry-level server-class applications …
SCR9 is a high-performance, silicon-proven, Linux-capable 64-bit RISC-V processor core for entry-level server-class applications and personal computing devices. The SCR9 core supports RISC-V standard "I" Integer, "M" Integer Multiplication and Division, "A" Atomic, "C" 16-bit Compressed, "F" Single-Precision Floating-Point, "D" Double-Precision Floating-Point, "V" Vector Operations, "B" Bit Manipulation, and "K" Scalar Cryptography extensions.
The SCR9 platform includes an out-of-order superscalar dual-issue 12-stage pipeline, a high-performance double-issue floating-point unit, PLIC or APLIC units for an advanced interrupt processing, and industry-standard AXI4 and JTAG interfaces increasing flexibility and compatibility. SCR9 includes an enhanced data prefetcher, optimized L1 and L2 caches, and an L3 network-on-chip cache with capacity up to 16MB. A hardware hypervisor, vector operations and heterogeneity support enable the design of multi-cluster architectures capable of running AOSP and Linux operating systems. The SCR9 core can operate in heterogenous multicore (up to 16 cores in a cluster) environments, offering hardware-level support for memory coherency and simplified external accelerators' integration.
SCR9 Key Features
| Core | |
|---|---|
| ISA | RV64GC[V][B][K], Vector Operations [V], Bit Manipulation [B], Scalar Cryptography Instructions [K] — optional |
| Pipeline | Out-of-order 12-stage superscalar |
| Floating-Point Unit (FPU) | Single/Double-precision, IEEE 754-2008 standard |
| Multicore Support (SMP) | Up to 16 cores with cache coherency |
| Branch Prediction Unit (BPU) | Static/Dynamic |
| Vector Processing Unit (VPU) | Vector register length 128-bit |
| Memory Subsystem | |
| L1 Cache | Up to 64KB + 64KB, error protection — parity/ECC |
| L2 Cache | From 128KB to 2MB, error protection — SECDED (ECC) |
| Shared L3 Cache | From 4 to 16MB |
| Memory Management Unit (MMU) | Up to 64 TLB instruction entries, up to 64 TLB data entries. Shared L2 TLB with configurable size up to 2k entries |
| Physical Memory Protection Unit (PMP) | Configurable, up to 32-region PMP |
| Interrupt Subsystem | |
| Platform-level interrupt controller (PLIC) | Up to 1023 interrupt lines, up to 256 priority levels |
| Advanced Interrupt Architecture (AIA) | Advanced platform level interrupt controller (APLIC) + Incoming Message Signaled Interrupt Controller (IMSIC) up to 1023 interrupt lines, up to 2047 distinct interrupt identities at each hart |
| Debug Subsystem | |
| Interface | JTAG/cJTAG-compliant interface |
| Breakpoints | Up to 8 hardware breakpoints, unlimited software breakpoints support |
| Interfaces | |
| AXI | Master AXI4 AMBA standard interface Slave AXI4 AMBA standard interface |
| External Ports | L3 cache coherency port |
| Timers and Counters | |
| Performance Monitoring | Up to 32 performance counters |
| Embedded 64-bit RTC Timer | Machine-mode timer interrupt support |
Development Tools
Syntacore Development Toolkit (SCR9 Optimized)
The SC-DT package is a ready-to-use software development kit containing pre-built and pre-configured tools that simplify software development for the SCR9 core. With SC-DT, you can take advantage of the pre-built tools and configurations to reduce the time and effort required to get up and running with SCR9. SC-DT supports Windows, Linux, and RISC-V Linux operating systems and includes:
Syntacore also supports and maintains system software such as Linux, Zephyr, OpenJDK, and U-boot that are not part of the SC-DT package and are downloadable separately.
SCR9 is available out-of-the-box, configurable, written in SystemVerilog and comes with a full set of pre-built, tested, and optimized development tools, pre-configured FPGA-based SDK and complete documentation. The software package includes ready-to-use toolchains, IDEs, operating systems, bootloaders, debuggers, simulators, and sample projects that reduce the time and effort required to get up and running with SCR9.
The SCR9 product package includes:
Note: some files may require an NDA depending on provider policy.
High-performance Linux-capable application core with a 12-stage dual-issue out-of-order pipeline, a VPU, cache coherency, and a hypervisor is a Coherency IP core from Syntacore listed on Semi IP Hub.
Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Coherency IP.
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