Quick Start

This page takes the shortest path to your first capture. For hardware details see the Hardware Guide, for the full feature set of each host app see the Software Guide, and for problems see the FAQ.

1. Unboxing

The box contains:

For optional accessories see Hardware Guide · Accessories.

2. Install the software

Several host apps are available for the SLogic32U3. Use SLogicView by default — it is Sipeed's own, maintained GUI and the baseline for this documentation.

Download the package for your platform from the GitHub Release:

Don't want to install anything? Just open slogic.sipeed.com in a browser — no install, no driver, works even on an Android phone. See Software Guide · SLogicWeb.

3. Drivers and permissions

4. Connect the device

[!WARNING]
Use a 10 Gbps USB port. The port spec directly determines the capture rate:

• Only a USB3.2 Gen2 (10 Gbps) port can sustain 800 MB/s and reach the rated rate combinations.
• A USB3.0 / 3.1 Gen1 (5 Gbps) port will be clearly below expectation.
• USB2.0 capture is not supported. It will not work on a USB2.0 port.

A 10 Gbps port is usually marked SS10 or 10. Blue alone is not reliable — many blue ports are only 5 Gbps. Check your motherboard or laptop spec.

[!TIP]
Prefer a direct USB-C connection. The bundled cable includes a C-to-A adapter for A ports, but the adapter adds insertion loss and lowers signal quality. On a weaker PC this can keep the rate from reaching full speed. Use the USB-C port directly when you can.

Steps:

1. Connect the SLogic32U3 directly to a 10 Gbps USB-C port with the bundled cable; avoid unpowered hubs and front-panel ports.
2. A cyan indicator (blue+green) means powered and a healthy USB3 link.
   • Blue only means the USB3 link is not established, usually a non-USB3 cable or port. See the FAQ.
3. Plug the Mini-HDMI probe cables into the channel groups you need; ports 0–3 map to CH0–7 / CH8–15 / CH16–23 / CH24–31. Mini-HDMI is keyed and goes in one way only.

5. Wiring and grounding

• Each group of 8 probe leads is color-coded in channel order; just count from the first lead. See Channel colors.
• Clip the test clips onto the signals, and run one ground per signal, close by.
• Never tie a ground lead to a signal line — it may damage the device.
• The higher the frequency and the more channels, the more grounding matters. See Probing and signal integrity.

6. First capture

Capturing one UART line, for example:

1. Launch the host app and pick the Sipeed SLogic Analyzer device in the top-left.
2. Set the sample rate: 10–100× the signal frequency is recommended. For a 115200-baud UART, 10 MHz is plenty.
3. Set the capture depth (Samples): try 1 M first.
4. Set the voltage threshold: for 3.3 V logic, about 1.6 V.
5. Enable only the channels actually wired — fewer channels allow a higher sample rate.
6. Click Run to capture.

7. View and decode

The figures here use PulseView screenshots from the same code base; SLogicView works the same way. They will be updated to SLogicView screenshots in a later revision.

1. After capture, zoom with the scroll wheel and pan by dragging with the left button.
2. Click Add protocol decoder on the toolbar and choose UART.
3. In the decoder settings, map RX to the wired channel and enter baud 115200, 8 data bits, no parity, 1 stop bit.
4. The decoded result is overlaid as annotations below the waveform.

8. Next steps

• Hardware interfaces, accessories, indicators, firmware update, signal integrity → Hardware Guide
• Differences between host apps and the web app, triggers, decoding, command line → Software Guide
• GPU acceleration and mixed-signal analysis → ngscopeclient
• Let AI run capture and decoding for you → SLogic with an AI Agent
• Troubleshooting → FAQ