HF65411_VC1¶
USB HiFi Decoder with USB Input and Simultaneous I2S/SPDIF Output, Supporting I²S Master/Slave Modes and USB Connection Indicator
1. Introduction¶
1.1 Product Description¶
HF65411_VC1 is a USB HiFi audio decoder with USB input and simultaneous I²S and S/PDIF output, designed specifically for digital audio applications such as digital audio interfaces and digital transports that require simultaneous I²S and S/PDIF output.
HF65411_VC1 supports USB Audio Class 1.0/2.0 interfaces, and the I²S output supports both master mode (MASTER) and slave mode (SLAVE). The flexible audio interfaces allow HF65411_VC1 to connect to various audio data converters, digital audio receivers and transmitters, as well as digital signal processors.
It is compatible with AES3, S/PDIF, IEC 60958, and EIAJ CP-1201 digital audio interfaces.
HF65411_VC1 provides a USB connection indicator output (X0D31): it outputs a high level when USB is connected and a low level when USB is disconnected, facilitating system status display and management.
1.2 Product Features¶
Audio Performance Features
- Supports USB input sample rates up to 192kHz (Mode 1)
- Simultaneous I²S and S/PDIF output
- Built-in SSRC and ASRC modules, supporting sample rate conversion between different interfaces and different sample rates
- Supports 32-band PEQ, applied to both I²S and S/PDIF outputs
- Supports 16–32-bit audio data formats
Interface Support Features
- Multiple digital interface support
- Supports USB audio input
- Supports I²S master mode (MASTER) audio output
- Supports I²S slave mode (SLAVE) audio output
- Supports S/PDIF audio output (simultaneous with I²S)
- Supports UART configuration interface
USB Function Features
- USB interface features
- Supports UAC 1.0
- Supports UAC 2.0
- USB connection indicator output (X0D31): high level when USB is connected, low level when disconnected
- Supports firmware upgrade via USB
- Supports HID and can upgrade MCU firmware via HID
System Compatibility - UAC 2.0 protocol, supports ASIO - Supports multiple operating systems, such as Windows, Linux, Android, macOS and iOS
1.3 Application Scenarios¶
- USB HiFi Digital Audio Interface
- USB Digital Transport
- USB HiFi Decoder
1.4 Product Functional Block Diagram¶
1.5 Ordering Information¶
| PRODUCT | ORDERING NUMBER | PACKAGE BODY | SIZE (NOM) | Hardware Model | Comments |
|---|---|---|---|---|---|
| HF65411_VC1 | HF65411-VC1 | SMT LGA-52 | 13x13mm | A316-Mini-V1 |
2. Modes and Specifications¶
2.1 Supported Input/Output Modes¶
| Mode No. | Input/Output Mode | Description |
|---|---|---|
| 1 | USB(UAC2.0) in-I²S(MASTER)/SPDIF out | USB input, simultaneous I²S (master mode) and S/PDIF output, UAC2.0 |
| 2 | USB(UAC1.0) in-I²S(MASTER)/SPDIF out | USB input, simultaneous I²S (master mode) and S/PDIF output, UAC1.0 |
| 3 | USB(UAC2.0) in-I²S(SLAVE)/SPDIF out | USB input, simultaneous I²S (slave mode) and S/PDIF output, UAC2.0 |
| 4 | USB(UAC1.0) in-I²S(SLAVE)/SPDIF out | USB input, simultaneous I²S (slave mode) and S/PDIF output, UAC1.0 |
2.2 Detailed Parameters of Each Operating Mode¶
2.2.1 Mode 1: USB(UAC2.0) in → I²S(MASTER) + S/PDIF out¶
Supported Audio Formats and Sample Rates:
| Interface | Audio Format | Supported Sample Rates |
|---|---|---|
| USB Input | PCM | 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz |
| I²S Output | PCM | 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz |
| S/PDIF Output | PCM | 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz |
2.2.2 Mode 2: USB(UAC1.0) in → I²S(MASTER) + S/PDIF out¶
Supported Audio Formats and Sample Rates:
| Interface | Audio Format | Supported Sample Rates |
|---|---|---|
| USB Input | PCM | 48kHz |
| I²S Output | PCM | 48kHz |
| S/PDIF Output | PCM | 48kHz |
2.2.3 Mode 3: USB(UAC2.0) in → I²S(SLAVE) + S/PDIF out¶
Supported Audio Formats and Sample Rates:
| Interface | Audio Format | Supported Sample Rates |
|---|---|---|
| USB Input | PCM | 48kHz |
| I²S Output | PCM | 48kHz (slave mode, clocks provided by external master device) |
| S/PDIF Output | PCM | 48kHz |
2.2.4 Mode 4: USB(UAC1.0) in → I²S(SLAVE) + S/PDIF out¶
Supported Audio Formats and Sample Rates:
| Interface | Audio Format | Supported Sample Rates |
|---|---|---|
| USB Input | PCM | 48kHz |
| I²S Output | PCM | 48kHz (slave mode, clocks provided by external master device) |
| S/PDIF Output | PCM | 48kHz |
2.3 USB Connection Indicator Function¶
In all operating modes, the X0D31 pin provides a USB connection indicator output:
| USB Status | X0D31 Output Level |
|---|---|
| USB connected | High level |
| USB disconnected | Low level |
3. Pin Configuration and Functions¶
3.1 HF65411_VC1 Pin Layout¶
3.2 HF65411_VC1 Pin Description¶
| Pin No. | Name | Type | Function |
|---|---|---|---|
| 1 | 3.3V | P | Module 3.3V power supply |
| 2 | X1D13 | I/O | NC |
| 3 | X1D16 | I/O | NC |
| 4 | GND | P | Module ground |
| 5 | X1D17 | I/O | NC |
| 6 | X1D18 | I/O | NC |
| 7 | X1D19 | I/O | NC |
| 8 | X1D22 | I/O | NC |
| 9 | X0D29 | I/O | NC |
| 10 | X0D35 | I/O | I²S_BCLK: output in master mode / input in slave mode |
| 11 | X0D36 | I/O | I²S_LRCLK: output in master mode / input in slave mode |
| 12 | X0D37 | I/O | NC |
| 13 | X0D38 | I/O | I²S_OUT_DATA0 (output in both master and slave modes) |
| 14 | X0D40 | I/O | NC |
| 15 | X0D39 | I/O | I²S_MCLK: output in master mode / input in slave mode |
| 16 | X0D42 | I/O | NC |
| 17 | X0D41 | I/O | NC |
| 18 | X0D43 | I/O | NC |
| 19 | X1D34 | I/O | S/PDIF output |
| 20 | GND | P | Module ground |
| 21 | X0D30 | I/O | CTL_MUTE; control output, active low |
| 22 | X0D31 | I/O | USB connection indicator output: high when USB is connected, low when disconnected |
| 23 | X0D32 | I/O | 49.152 MHz clock control |
| 24 | X0D33 | I/O | 45.1584 MHz clock control |
| 25 | GND | P | Module ground |
| 26 | GND | P | Module ground |
| 27 | GND | P | Module ground |
| 28 | X0D00 | I/O | UART_TX, connected to MCU_RX |
| 29 | X0D11 | I/O | UART_RX, connected to MCU_TX |
| 30 | X1D00 | I/O | NC |
| 31 | X1D01 | I/O | NC |
| 32 | GND | P | Module ground |
| 33 | X1D09 | I/O | NC |
| 34 | X1D10 | I/O | NC |
| 35 | X1D11 | I/O | Connected to Pin 15 X0D39; output in master mode / input in slave mode |
| 36 | GND | P | Module ground |
| 37 | GND | P | Module ground |
| 38 | TDI | I/O | XTAG debug pin |
| 39 | TDO | I/O | XTAG debug pin |
| 40 | TMS | I/O | XTAG debug pin |
| 41 | TCK | I/O | XTAG debug pin |
| 42 | RST_N | I/O | System reset, active low |
| 43 | 1.8V | P | Module 1.8V power supply |
| 44 | GND | P | Module ground |
| 45 | USB_DM | I/O | USB_DM |
| 46 | USB_DP | I/O | USB_DP |
| 47 | GND | P | Module ground |
| 48 | 0.9V | P | Module 0.9V power supply |
| 49 | GND | P | Module ground |
| 50 | GND | P | Module ground |
| 51 | GND | P | Module ground |
| 52 | GND | P | Module ground |
Pin Type Description
In the table, I/O type definitions: I = input, O = output, P = power, I/O = input/output
4. Hardware Specifications¶
4.1 Product Dimensions¶
13±0.1mm(L)X13±0.1mm(W)X0.8±0.1mm(H)
4.2 Module Package Diagram¶
5. Minimum System Reference Design¶
6. Product Packaging Information¶
Tray + Outer Box Packaging
7. Revision History¶
| Version | Date | Description | Editor |
|---|---|---|---|
| V1.0 | 2026-08-22 | Initial version release | |