Hantek DSO-220
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The Voltcraft DSO-220 is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MHz and 60MS/s sampling rate.
This is a rebadged Hantek DSO-220.
See Voltcraft DSO-220/Info for more details (such as lsusb -vvv output) about the device.
Hardware
The PCB does not look professionally assembled; both my unit and the unit in the mikrocontroller.net teardown linked below appear to have most components, including SMD ones, hand-soldered. There are clear reworks present, with SMD resistors bridging between through-hole pads on the underside of the board.
- Main chip: Xilinx XC95144XL CPLD (JTAG IDCODE 0x59608093) (datasheet)
- USB: Cypress EZ-USB AN2131QC (datasheet)
- I2C EEPROM: Unknown (die marking masked on all photos I've seen)
- SRAM (64KB): 2x ISSI IS62LV256 32K x 8 Low Voltage Static RAM (datasheet)
- Dual 4-channel analog multiplexer/demultiplexer: 74HCT4052 (datasheet)
- Crystal: 60MHz
There is an unpopulated JTAG header for the CPLD labeled J8. Its pinout is as follows:
- +3.3v (pin 1 has a square pad)
- TCK
- TDI
- TDO
- TMS
- GND
Photos
TODO.
Protocol
TODO.