Abstract:

The conventional method of using an oscilloscope,multimeter,logic analyzer or other equipment for digital circuit board testing is complex,time consuming and not reliable.In this paper,the hardware design of a general digital circuit board testing system is introduced.Unlike traditional digital circuit board testing systems,this design has better performance and parameters:the testing frequency can reach 50 MHz and can be set as integer division of 100 MHz;the testing level is compatible to -6 V~+9 V and can be programmed by 100 mV;there are up to 32 channels,each channel having 1 Mbit memory depth and 50 mA current drive capability with overload protection,and can work either as input or output for three-state synchronously.

Key words: digital circuit board testing;embedded hardware design;FPGA