DSO Quad

DSO Quad also known as DSO203 is a pocket size 4 channel digital oscilloscope for common electronic engineering tasks. It's based on ARM cortex M3 (STM32F103VCT6), providing 72MS/s sampling rate with integrated FPGA and high speed ADC. An internal 2MB USB disk can be used to store waveform captures, user applications and to upgrade firmware.

Model: TES725AAS


Source(s): Features support

Application Ideas

User applications

Ongoing projects:

Idea Collection


use 'wave out' to generate a pulse/step when master unit triggers, use C/D as trigger for slave(s)


See also information on application development for the DSO Quad


Analog channel * 2 [CH_A] [CH_B]
Digital channel * 2 [CH_C] [CH_D]
Vertical Scale 20mV-10V/div (1-2-5 step) on x1 probe / 200mV -100V/div (1-2-5 step) on x10 probe
Vertical resolution 8 bit
Input coupling AC/DC
Max input voltage 80Vpp (x1 probe) / 400Vpp (x10 probe)
Storage 4K per channel / 8K on single channel
Software trigger type edge, pulse, level (to be added)
Hardware trigger type edge
Trigger source CH1/CH2/EXT
Trigger mode Auto, Normal, Single, SCAN, None
Test Signal generator 10Hz to 8MHz 2.8Vpp Square Wave, duty cycle 10~90% adjustable / 10Hz to 20kHz 2.8Vpp Sine, Square, Sawtooth, Triangle wave
Storage internal 2MB USB disk, BMP, DAT file
Auto measure Vmax, Vmin, Vpp, Vavr, Vrms, Freq, Period, Pulse, Duty
Cursor measurement Level, Voltage
Display mode CH1, CH2, EXT, CH1+CH2, CH1-CH2
Sampling mode real time
Sampling rate 30S/s - 72MS/s
Power LiPo battery
Dimension 98 * 60 * 14.5 (mm)
Weight 80g (without battery)
Accesories within Pack 2 mcx osilloscope probe, 2 mcx digital probe


Please add links to core components data-sheets like

CPU 72 Mhz - ARM 32-bit Cortex™-M3 CPU - STM32F103VC [2]
FPGA ICE65F_VQ100 [3]
ADC AD9288-40 [4]
OP-Amps OPA2354 [5]
(add more here)


Improper operation of this device could result in physical injury and/or damage to the device. Note all necessary precautions, and be sure to read all documentation before using the device.


Schematic and firmware (HW2.2 ~ HW2.72) - http://www.seeedstudio.com/wiki/DSO_Quad:Upgrading_Firmware#Firmware_List

Discussion board with resouces for HW2.6 - http://www.seeedstudio.com/forum/viewtopic.php?f=22&t=1929

DSO Quad User's manual(ver1.0 above): DS203_yijian_app_user_manual.rar‎

Unofficial manual written by the community: DSO Quad Manual (by the community)

Upgrading firmware

Please note that this procedure currently only works under Windows. Instructions For Linux are here. (2011-04-29) If we can get the upgrade disk to work on Linux and Mac, it would be quite easy to write an application to automate this process for less experienced users. It might even be possible to have the upgrade program check the hardware version to prevent uploading the wrong firmware.

Where to find firmware

Track the latest version to firmware at: http://garden.seeedstudio.com/index.php?title=DSO_Quad:Upgrading_Firmware#Firmware_List you can always download the latest version of firmware

You could also build the firmware from source.

Version warning

WARNING: It is important that you use the firmware for your particular hardware version. The hardware version is shown on the splash screen when you boot the device. Ask for help in the forums if you can't determine your hardware version. If you upload the wrong firmware, you could brick the device.

Upgrade procedure

(Windows only) Connect the DSO Quad to your PC with a mini USB cable. Hold down the ">||" (play/pause) button while turning on the device. Your device is now in firmware upgrade mode, and a USB disk should appear on your system. You copy the firmware files one at a time, and each time you copy a new file, the device will disconnect to prepare the file. When the disk reconnects, the extension of the file you uploaded will change (".rdy" means the upload worked properly).

The order that you upload the files in DOES matter. Start by uploading the .hex files (order unimportant). To upload the .BIN files, you need to first upload the corresponding .ADR file. This tells the device where to put the binary file (e.g. upload CFG_FPGA.ADR first, then upload xxxxFPGA.BIN immediately after). If you make a mistake, delete all the files and start again.

When you're finished uploading all the firmware files, turn off the device to complete the upgrade. When you boot the device again, your firmware versions should be updated. If you get an error at the splash screen, try uploading the firmware again, carefully following the instructions above.

More details and Linux instructions here: DSO_Quad:Upgrading_Firmware

File Descriptions

File Type Filename Format Description
FPGA File xxxxFPGA.BIN configuration data for the FPGA
Logo File logo_xxx.BIN Create any 16 color 64*256 .BMP file (filesize = 46.9KB), and change the extension to .INF. This is the image displayed on the splash screen.
System File SYS_xxxx.hex  ??? (description needed)
Application File APP_xxxx.hex  ??? (description needed)
Address File xxxx.ADR These files tell the device where to put the next .BIN file you upload. There is one for the FPGA file, and one for the LOGO file. The files are named so that you know which goes with which.

note: as newer versions become available, these filenames may appear slightly different. The x's represent values that could change over time.

Memory layout

Begin End Size note
0x00000 0x03fff 16384 DFU
0x04000 0x0bfff 32768 SYS
0x0c000 0x13fff 32768 APP1 (default)
0x14000 0x1bfff 32768 APP2
0x1c000 0x23fff 32768 APP3
0x24000 0x2bfff 32768 APP4
0x2c000 0x3d7ff 71680 FPGA bitstream (Datasheet says maximum size is 533KBit, so this is a bit large)
0x3d800 0x3ffff 10240 Logo (bmp, 256x64, 4 bit)

Note: The flash base address is 0x08000000, but is mirrored by the chip at 0x00000000 when BOOT0 is low.

Bug Tracker

DSO Quad engineering sample bug and firmware


Related Pages

See Also

DSO Nano


This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.

External Links

  1. Seeedstudio Blog [6]
  2. More photos on flickr [7]
  3. DS203 application in BMW inspection (Chinese, translated automatically in to english) [Original page ] - Some guys working for BMW inspected the car with a DSO203, besides the palm size and handy performance, DSO203 operates perfectly in inspecting the BWM bus:FlexRay.
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