Ok,
so my personal requirement is:
- direct connection from FPGA to 0.1" headers
- buffers in sockets on the daughter board (easy replacement)
- cable from that daughter board to outside the PC for attaching
some currently developed stuff
I work with old LCD's, so I could be a "middle speed" user (6-25 MHz
clock, 32 parallel outputs). Also it would be great for me to have an
LVDS output/transmitter to make experiments with newer LCD panels.
Why to use OGD for this?
- a graphic core, linux compatible -> easy use of displays
- the fpga is on high speed bus, directly in PC
(comparing to rs232/lpt/usb attached "cheap" evaluation boards)
Daniel
Jack Carroll wrote:
Listening to this thread, I'd say the first problem is to idenfify
the requirement. What users will require signals to be brought off the
board, and what will they want to accomplish? If that question can be
answered, it will be a lot easier to decide what connector types to use,
what set of signals to bring out, and whether to add buffering and/or level
translation on-board.
Nothing says there can't be more than one connector, either. You
might want unbuffered PMC for speed using piggyback boards, and buffered
0.1" headers to bring out lab test points. You might want your sacrificial
buffer ICs in sockets, too -- although nowadays there are some really small
SMT TVS diode arrays that can protect them against ESD and surge.
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