VT1730

The VIA Envy VT1730 is an 8-channel, 32-bit/384 kHz audio controller specifically designed to achieve cinema-quality audio recording and playback in high fidelity USB and MIDI system applications. Whether it’s using the High-Speed bandwidth capacity of USB 2.0 (480 Mb/s) to simultaneously support audio streams from a guitar, bass, keyboard and microphone, or delivering true-to-life sound to multiple speakers in a home theatre set-up, the VIA Envy VT1730 offers outstanding audio performance and impressive application flexibility.

The highly integrated single chip USB audio solution is embedded with a number of crucial modules, including a standard 8032 MCU core, USB transceiver, five I2C masters and one slave controller, an I²S controller, a serial flash controller, four SPI ports, phase locked loop (PLLs) with internal oscillator, and a 3.3 V~2.0V regulator.

The VIA VT1730 also supports multi-channel PCM digital audio format up to 32-bit resolution and 384 kHz sample rate as well as multiple audio bit streams of up to 5 Input streams and 6 Output streams. Additionally, the controller is capable of connecting 8 Inputs and 8 Outputs simultaneously in selectable I²S or MSB-justified Digital Audio Interface. An S/PDIF interface with two stereo output ports and one stereo input port also supports up to a 24-bit resolution and 192 kHz sample rate.

Feature Highlights

• USB Interface
  • USB 2.0 High-Speed (480 Mbps) Device Compliant
  • USB 2.0 Full-Speed (12 Mbps) Device Compliant
  • USB 2.0 High-Speed PHY Integrated
  • USB Audio Class v1.0/ v2.0 Device Compliant
  • USB Device Firmware Upgrade v1.1 Compliant

• High Resolution, Multi-Channel PCM Audio Bit Streams
  • Up to 32-bit, 384kHz sample rate
  • Up to 5 Input Streams and 6 Output Streams
• I²S Audio Interface
  • 8 I²S Input
  • 8 I²S Output
    • Mono/ 2-Ch
    • 16/20/24-bit/32-bit
    • 32 / 44.1 / 48 / 88.2 / 96 / 176.4 / 192 / 384 kHz
• S/PDIF Interface
  • 2 Stereo SPDIF Output
  • 1 Stereo SPDIF Input
    • Mono / 2-Ch
    • 16 / 20 / 24-bit
    • SPIDIF In: 32 / 44.1 / 48 / 88.2 / 96 kHz
    • SPIDIF Out: 44.1 / 48 / 88.2 / 96 / 192 kHz
• Blu-ray Disc™ Audio Content Protection
  • 32-bit/192kHz audio output delivering cinema-level audio experience
• MIDI Interface
  • 3 MIDI In
  • 3 MIDI Out
  • Any MIDI port can be used as UART
• Supports both DSD and PCM Output Formats.
  • (pin-shared with I²S and MIDI interface)

VT1730 Block Diagram