An SoC (System on Chip) is a system-level integrated circuit. The Audio SoC, a single-chip audio system from Nuvoton, employs Cortex-M0/M4 cores and features fundamental innovative technologies of Arm Cortex-M series processors, including ∑△ ADC, CODEC, OP, Class D, and Voice Recognition functionalities.

Key innovative features of the Cortex-M series:

• RISC processor core with a high-performance 32-bit MPU for stable computation, featuring a low-latency 3-stage pipeline and rapid interrupt response capability.
• Thumb-2 instruction set, optimal 16/32-bit instruction mix for superior code density.
• Low-power modes supporting multiple power domains.
• Support for various efficient digital signal control functions.
• Utilization of extended single-cycle Multiply-Accumulate (MAC) instructions, optimized MIMD operations, saturation operation instructions, and optional single-precision floating-point unit (FPU).

Audio SoC Roadmap:

Cortex-M0 series Selection Table:

Arm Cortex-M0 based Audio SoC series

Applications based on Cortex-M0 Products:

In applications demanding higher computational power, Nuvoton introduces its Cortex-M4 series products, featuring a clock frequency of up to 200 MHz and 512K ROM space, alongside support for 4-channel DMIC in various audio applications. These products excel in environments with noise levels up to 3M and quiet environments up to 5M, effectively suppressing noise interference. Specifically designed for products requiring voice interaction or telephony functions, the I94124S incorporates echo cancellation to enhance voice clarity during interactions and music playback, enabling real-time noise reduction for voice calls.

Key Technical Parameters:

• Maximum noise suppression: >23dB
• Maximum echo delay time: <32 ms
• Audio sampling rate: 16 kHz
• Audio processing delay: <10 ms
• Input ports: MIC, AUX
• Output ports: HP, SPK, USB
• Support for single MIC (NR+AEC) and dual MIC (Beam Forming) algorithms

Cortex-M4 Series Selection Table:

Arm Cortex-M4 based Audio SoC series

Applications based on Cortex-M4 Products:

Application – Gaming Controller: