Outputpins on Load Modules are on or flickering after startup

Hey community,

how many Load-Modules can I plug into my fez hydra? When I power on my FEZ Hydra mainboard, some OutputPins on several Load Modules are on or flickering.
Is this normal?

My configuration:

  • 1 FEZ Hydra
  • 8 Load Modules (SocketNo: 4, 7, 8, 10, 11, 12, 13, 14)
  • 1 USB DP Module (SocketNo: 2)
  • ENC28 Module (SocketNo: 3)

I also can’t change the state of the Output Pins 5, 6 and 7 on the Load Module connected with FEZ Hydra on Socket No 4.
Pin 5 is on, Pin 6 and 7 dont’ work - also with an alternative Load Module. Is this normal?

The only pins shared between sockets are the SPI one so the sockets with S (2 of them) will have 3 pins shared. So, if you use ethernet then you will lose some pins on the other S socket. Beside that, all other pins should work as expected. If not let us know what pins.

1 Like

@ DesperateGuy - You may need to post some code, so that someone can help you further.


@ Gus
sounds plausible to me. So I’ve lost the three pins.
Can you also imagine, why some leds on other load modules are on, when I power on the fez hydra board.
I have to turn them off. Is there a trick :wink: