DesignWare ARC HS 32 Bit Processor Family

multi-core prcessor, 32-bit processors

“We needed a high-performance, low-power processor for our SSD controller…Synopsys’ silicon-proven ARC HS38 processor delivered better performance with half the power consumption of competing processors, and was the best solution to meet our requirements.” ~ Starblaze Technology

Maximum Performance for Embedded Applications

The DesignWare® ARC® HS family of 32-bit processors is based on the scalable ARCv2 Instruction Set Architecture (ISA) and is optimized to deliver maximum performance efficiency (DMIPS/mW and DMIPS/mm2) making it ideally suited for embedded applications with high-speed data and signal processing requirements. All HS processors are available in single-, dual- and quad-core configurations.

The ARC HS3x Family includes the multicore-capable HS34, HS36 and HS38 processors. The HS34 is a high-performance cacheless processor, while the HS36 includes up to 64KB of instruction and data caches. The HS38, optimized for applications running Linux, has a full-featured memory management unit (MMU) supporting a 40-bit physical address space and page sizes up to 16 megabytes, giving designers the ability to directly address a terabyte of memory with faster data access and higher system performance.

The ARC HS4x/HS4xD Family, which includes the HS44, HS46, HS48, HS45D and HS47D processors, implements a dual-issue superscalar architecture that delivers up to 6000 DMIPS per core (16ff typical conditions). The HS46 and HS48 offer instruction and data caches (up to 64 KBs of each) and support for full Level 1 (L1) cache coherency. The HS48 also incorporates up to eight megabytes of Level 2 (L2) cache and a full-featured memory management unit (MMU) supporting symmetric multiprocessing (SMP) Linux. The HS45D and HS47D support more than 150 DSP-optimized instructions, delivering a unique combination of high-performance control and high-efficiency digital signal processing. To speed the execution of math functions, the HS45D and HS47D give designers the option to implement a hardware integer divider, instructions for 64-bit multiply, multiply-accumulate (MAC), vector addition and vector subtraction, and a optional IEEE 754-compliant floating point unit (single- or double-precision or both). The ARC HS4xD processors are compatible with the ultra-low power ARC EMxD processors and have the same instruction set, making it easy to migrate code between the two processor families.

All ARC HS processors are highly configurable and extensible, enabling designers to tailor each HS processor instance on their SoC for the optimum balance of performance, power and area.

The ARC HS Family is supported by a robust ecosystem of software and hardware development tools, including the MetaWare Development Kit, a complete solution for developing, debugging, and optimizing embedded software on ARC processors, the MQX real-time operating system (RTOS) and a portfolio of third-party tools, operating systems and middleware from leading industry vendors through the ARC Access Program.

PPA Efficiency

The ARC Advantage: Maximum Performance With Minimum Area and Power

ARC processor cores are optimized to deliver the best performance/power/area (PPA) efficiency in the industry for embedded SoCs. Designed from the start for power-sensitive embedded applications, ARC processors implement a Harvard architecture for higher performance through simultaneous instruction and data memory access, and a high-speed scalar pipeline for maximum power efficiency. The 32-bit RISC engine offers a mixed 16-bit/32-bit instruction set for greater code density in embedded systems.

ARC's high degree of configurability and instruction set architecture (ISA) extensibility contribute to its best-in-class PPA efficiency. Designers have the ability to add or omit hardware features to optimize the core's PPA for their target application - no wasted gates. ARC users also have the ability to add their own custom instructions and hardware accelerators to the core, as well as tightly couple memory and peripherals, enabling dramatic improvements in performance and power-efficiency at both the processor and system levels.

Complete and proven commercial and open source tool chains, optimized for ARC processors, give SoC designers the development environment they need to efficiently develop ARC-based systems that meet all of their PPA targets.


The ARC Advantage: Implement Only the Hardware You Need to Optimize PPA

ARC processors are highly configurable, allowing designers to optimize the performance, power and area of each processor instance on their SoC by implementing only the hardware needed. The ARChitect wizard enables drag-and-drop configuration of the core, including options for

  • Instruction, program counter and loop counter widths
  • Register file size
  • Timers, reset and interrupts
  • Byte ordering
  • Memory type, size, partitioning, base address
  • Power management, clock gating
  • Ports and bus protocol
  • Multipliers, dividers and other hardware features
  • Licensable components such as a Memory Protection Unit (MPU), Floating Point Unit (FPU) and Real-Time Trace (RTT)
  • Adding/removing instructions


The ARC Advantage: Add User-Defined Instructions to Accelerate Code Execution and Lower Power Consumption

ARC Processor EXtension (APEX) technology enables ARC users to easily add their own custom hardware to the processor, dramatically boosting performance and/or reducing power consumption for their targeted application(s). ARC processors can be extended with:

  • User-defined instructions
  • User-supplied hardware (e.g., Verilog RTL)
  • Core registers
  • Auxiliary registers
  • Condition & status codes
  • Memory mapped blocks and closely coupled peripherals

ARC processor extensions enable users to dramatically improve performance, power and area. User-defined instructions, for example, can accelerate software execution, enabling the same code to run in much fewer cycles which reduces energy consumption by lowering clock frequency requirements (or enables the execution of more operations with the same energy.) Code size is also reduced, lowering memory requirements which leads to additional cost and power savings. 

The APEX interface also enables ARC users to tightly couple memory and peripherals to the processor, eliminating the need for additional bus infrastructure. The resulting "bus-less" design further reduces area and latency, increasing system-level performance while reducing costs.