Design Decisions / Project goals
Design Decisions / Project goals
teve,
Well, it looks like there are some design decisions to be made. I tend toward proven designs like CHD's, but we could take it further. Rather than be everthing to everyone, though, I'd advocate setting a set of goals and agree on those from the start. I think you should take a cut at this (MSCP or not, QBUS or OMNIBUS, CPLD or FPGA or microprocessor-based, through hole or SMD).
Some observations:
I honestly don't think through-hole will cut it, and surface-mount (though a pain) will ensure parts availability now and in the future.
Second, FPGA or microprocessor will need to be decided.
It's painful that it's a 3.3V world so you either choose a 5V obsolete or almost obsolete part or do voltage translation from 5V.
If you use a micro, I think you'll need something better than an 8-bit PIC . Propeller chip?
This is likely to be done with little PC board space, so either a *really* short QBUS or a lot of blank (or breadboard) space would work. (But square inches == $ with boards)
So, just my 0.02 USD and I'd just be happy with anything that works in the end..
-Crawford
Design Decisions / Project goals
teve,
Well, it looks like there are some design decisions to be made. I tend toward proven designs like CHD's, but we could take it further. Rather than be everthing to everyone, though, I'd advocate setting a set of goals and agree on those from the start. I think you should take a cut at this (MSCP or not, QBUS or OMNIBUS, CPLD or FPGA or microprocessor-based, through hole or SMD).
Some observations:
I honestly don't think through-hole will cut it, and surface-mount (though a pain) will ensure parts availability now and in the future.
Second, FPGA or microprocessor will need to be decided.
It's painful that it's a 3.3V world so you either choose a 5V obsolete or almost obsolete part or do voltage translation from 5V.
If you use a micro, I think you'll need something better than an 8-bit PIC . Propeller chip?
This is likely to be done with little PC board space, so either a *really* short QBUS or a lot of blank (or breadboard) space would work. (But square inches == $ with boards)
So, just my 0.02 USD and I'd just be happy with anything that works in the end..
-Crawford