Hello,
We have problem with our leopard board v1.6.
The resistance between the pin (CIN7 / GPIO101) and GND depend of the leopard board (3.7kOhms to 150 kOhms without supply or connection) when we receive the board.
For all the pin of the port CIN0 - CIN6, the resistance is about 1.7MOhms. We have test also an old leopard board v1.5 and the resistance of this pin is 1.7MOhms.
We interface this port with a tvp5146, and after some days of running the resistance decrease under 200 Ohms and our video application don't work.
Do you have any explanation or same problem ?
Cordially
C. GAUSSON
The DM365 is 3.3V IO. Can you check what is the voltage level of the tvp5146 output? It seems to me the input port is shorted.
Are all of the input pins 200 Ohms, or just only some of them?
The TVP5146 use the same 3.3V IO than the DM355.
The output pin of the TVP5146 is interface to the CIN0 to CIN7 of the DM355 (with a 33 Ohms series resistor).
I have the problem on only one pin (CIN7 / GPIO101).
The impedance of this pin is different ( I have test 5 new boards of our stock without any supply). The impedance vary from 3.7kOhms to 150 kOhms. Normally the impedance of all the pin that I have tested is 1.7 Mohms.
I think that we receive the new board with a problem.