--- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> Incidentally, does anyone have a pinout for the 48 pin version of the
> COM5025? Yes, it seems to have existed, and the pinout is somewhat
> similar to the 7990 ethernet chip (!), to the extent that I have a
> bridge/router with 3 48 pin sockets that can take either 7990s or 5025s
> (there is one jumper to move for each socket, depending on what chip
> you've fitted). If you put a 7990 in the socket, you link a header
> alongside it to an little PCB with the AUI interface stuff on it. If you
> have the 5025, you connect the header to a differnt board with RS232-like
> buffers on it. But things like the data pins, etc, must be in the same
> places on both chips.
Wow! That's strange. Nope... I have tubes and tubes of 40-pin COM5025
chips, but never even heard of a 48-pin version. The bus-side should be
easy to divine, but I have no idea about the serial side.
-ethan
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Received on Thu Apr 12 2001 - 15:43:12 BST