Hello everyone,


I have trouble with getting data from unknown ports. I am working on a 
reverse engineering project, in this project I don't know anything 
inside the circuit. This is kind of black box model. The whole system is 
ASIC design.
In this case, I want to derive the transfer function of the system by 
applying certain input and get record outputs.

On system, there are four ports. One port is DB9 connector, so I can 
directly get data with serial to USB convertor. But reaming ports are 
unknown. I just know the number of pins, operating frequency and voltage 
levels. These ports are having 10,26 and 60 pins and all port are 
working at 40 MHz and voltage level is 3.3 volts.


I need to find some hardware which can somehow give me the ability to 
read and acquire data. My idea is to use the time multiplexing to reduce 
the number of required pins for recording devices.

Please, give me some suggestion about the selecting proper device to 
record data or give me idea about any device available in the market for 
this kind of job.