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Overview

SmartDV’s I2S Controller IP is a silicon-proven, fully featured Inter-IC Sound solution purpose-built for SoC designs requiring reliable, standards-compliant digital audio connectivity across consumer electronics, automotive, and IoT applications. Compliant with the Philips I2S Bus Specification (revised June 1996), it delivers complete master and slave transmitter and receiver functionality with bidirectional operation through two unidirectional serial data lines, supporting simultaneous audio playback and recording.

Designed for the practical integration requirements of modern digital audio SoC designs, the IP supports Time Division Multiplexed (TDM) formats, configurable 8/16/24/32/64-bit DAC/ADC resolution, and audio sampling rates up to 192 kHz. Its support for I2S format, PCM format, LSB and MSB bit ordering, programmable word select resolution in master mode, programmable delayed capture and driving of serial data, four selectable reference clock sources with programmable clock divider, interrupt-driven or DMA operation, and 64-deep 32-word FIFOs for left/right transmit/receive give consumer, automotive, and IoT SoC teams a production-tested, feature-complete I2S implementation.

Built for design flexibility and silicon efficiency, the IP core is highly configurable for both ASIC and FPGA implementations, with a strong focus on area optimization, power management, and peak performance. Its local clock gating for minimal power consumption and freeze/suspend operation for system debug support enable fast integration and confident design bring-up across a wide range of process nodes.

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I2S Controller
Key Features
  • Full I2S Master and Slave Functionality – Complete master mode and slave mode transmitter and receiver implementation per Philips I2S Bus Specification
  • Simultaneous Playback and Recording – Bidirectional operation through two unidirectional serial data lines for full-duplex audio playback and recording
  • TDM Format Support – Time Division Multiplexed formats for multi-channel audio applications
  • Configurable Resolution and Sample Rate – 8/16/24/32/64-bit DAC/ADC resolution with sampling rates up to 192 kHz (8/16/24/32/48/96/192 kHz)
  • Multiple Data Format Support – I2S format, PCM format, and both LSB and MSB bit ordering
  • Flexible Clocking – Programmable word select resolution (8-64 clock cycles) in master mode, four selectable reference clock sources, and programmable clock divider
  • Deep FIFO Architecture – 64-deep 32-word FIFOs for left/right transmit and receive channels with programmable FIFO threshold levels
  • Interrupt-Driven and DMA Operation – Flexible interrupt-driven or DMA-based data transfer with dedicated transmit FIFO underrun and receive FIFO overrun interrupts
  • Low-Power Design – Local clock gating for minimal power consumption during idle periods
  • Debug Support – Freeze/suspend operation for system-level debug and diagnostics
Compliance and Compatibility
  • Compliant with Philips I2S Bus Specification (revised June 1996)
  • Configurable SoC interface supporting AMBA AXI, AHB, APB, and custom wrappers for seamless integration
  • Compatible with ASIC and FPGA design flows across leading foundry process nodes
  • Compatible with all major EDA synthesis, simulation, and linting flows

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