The SA9123L driver is a software interface used to extract power measurement data from a specific 3-phase metering chip. It relies on SPI communication to read registers containing raw voltage, current, and energy data, which the driver then converts into engineering units (Volts, Amps, kWh) using calibration formulas.
The SA9123L is a high-performance USB audio streaming controller developed by Savitech, primarily used in Digital-to-Analog Converters (DACs) and professional audio interfaces. It supports high-resolution PCM audio up to 24-bit/192kHz, making it a popular choice for audiophiles and professional audio recording. Essential Specifications of the SA9123L
The SA9123L chip is designed for "Bravo" high-fidelity sound, focusing on low-jitter output through asynchronous mode.
Resolution & Sampling: Supports 16/24-bit depth and sampling rates of 44.1, 48, 88.2, 96, 176.4, and 192kHz. sa9123l driver
Connectivity: USB 2.0 High-Speed compliant; supports USB Audio Class (UAC) 1.0 and 2.0.
Outputs: Features integrated I2S and S/PDIF (Coaxial/Optical) transmit streaming outputs.
Power: Operates on a supply range of 1.8V to 3.3V with dynamic consumption adjustment. Driver Installation Guide The SA9123L driver is a software interface used
Whether you need a manual driver depends strictly on your operating system. Modern systems typically recognize the SA9123L as a plug-and-play device. Nvarcher SA9123L USB Audio Streaming Controller
Independent measurements (from e.g., L7Audiolab) show the SA9123L’s onboard clock recovery has ~150–200 ps of jitter over USB. That’s fine for $50 DACs, but audible? Probably not. However, an XMOS chip with external Crystek clocks can get down to 50 ps. For critical listening, use the SA9123L in asynchronous mode with a good external oscillator on the DAC side.
Unlike newer XMOS (which does DSD256/512 natively), the SA9123L only does DoP (DSD over PCM). That means DSD128 maximum, and it wastes bandwidth. If you’re a DSD purist, look elsewhere. Warning : Do not connect the 5V pin directly to a 3
Warning: Do not connect the 5V pin directly to a 3.3V-only MCU (e.g., ESP32, STM32 at 3.3V) – use a level shifter.
sudo modprobe ch341
echo 'ch341' | sudo tee /etc/modules-load.d/ch341.conf
A: Yes, in 95% of cases. The SA9123L is internally compatible with the CH340. Use the CH341SER driver from WCH.