Edge-side AI audio processor now features RISC-V AndesCore D25F

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Andes Technology and Spacetouch Technology, a company specialising in consumer electronics, have jointly announced the AndesCore D25F has been adopted by the SPV60 series as an edge-side audio processor.

www.newelectronics.co.uk/, Jan. 12, 2024 – 

The D25F processor, which is based on the AndeStar V5 architecture, is a 32-bit RISC-V CPU IP core equipped with P-extension (DSP/SIMD extension, draft version). Combined with the RISC-V DSP/SIMD ISA compiler, DSP library and emulator, alongside the highly optimised AndeSoft NN Library, customers will be able to accelerate AI application computing.

In addition, the D25F has several optional features, such as instruction and data cache, low latency local memory, and ECC for memory protection.

It can be configured as an AXI 64-bit or AHB 64/32-bit bus interface, and there is also a port that can access local memory directly from outside. It can also be configured with a Platform Level Interrupt Controller (PLIC) that supports more than 1,000 interrupt sources for rapid interrupt response, prioritisation, and pre-emption.

Furthermore, the Andes Custom Extension (ACE) provides additional flexibility through customised special-purpose instructions.

At the same time, the new generation of SPV60 series edge-side AI audio processor chips launched by Spacetouch have adopted a CPU + NPU + uDSP heterogeneous multi-core architecture, combining different types of processors together to efficiently handle various tasks, especially in the field of audio processing.

The design of this heterogeneous multi-core architecture presents a significant improvement for AI audio processor chips.

The SPV60 series of on-device AI audio processors integrate the Andes D25F core and Spacetouch's newly developed uDSP and AI NPU (Neural Network Processor). The D25F CPU has a maximum frequency higher than 400MHz and can handle general-purpose computing tasks. The NPU's computing power reaches 100GOPs and is optimised for neural network computing.

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