To: "Xylo-SDR Discussion" <[email protected]> Sent: Wednesday, January 25, 2006 5:02 PM Subject: Re: [Xylo-SDR] RFC - Motherboard
1) Each board must be addressable from the Janus board via I2C or maybe JTAG in order for the Janus to do the firmware download to each FPGA.I think the motherboard/bus should directly and distinctly support JTAG, in which some signals are in parallel, some are daisy-chained. There may well be a mix of JTAG devices, not only FPGAs, on the various boards -- including daughter boards.
I feel it is best to have individual JTAG connectors on the boards, JTAG doesn't usually work with a mix of devices on the chain.
Leon