Two CPLDs on one board & ISP

Hi Dave,

thanks a lot for the reply.

Just to clarify, at this stage, the prototype will be built on Eurocard prototype board and hand-soldered, rather then being a properly constructed PCB.

The JTAG connector and two PLCC-84 sockets are in close proximity to each other. I intended to take the "traces" (wires) from the connector to the closest CPLD, then continue on to the second, although I could wire the sockets in a star configuration back to the connector if that was better practice.

At this stage though, the board is really a "proof of concept". rather than a finalised design - particularly from a layout perspective.

I mentioned buffers as I found a note in one of the (many) Altera document that I have been referring to that suggested that buffers were only needed when the number of devices increased, to say, over 4.

From your reply though, it seems that my "understanding" is correct in principle - I can multi-drop a single JTAG connector to 2 devices.

regards

Dave