How to configuration 2 FPGAs mit one cable?

Using JTAG chain or using other configuration mode?

With two Xilinx FPGAs in the same JTAG chain, the Xilinx Impact software will auto-detect your both devices. Then Impact will ask to associated the .bit file for each devices ...

Regards, Laurent Gauch ____________________________

Thanks, Laurent

Is JTAG Chain = Boundary Scan Chain? Yes, it is "Automatically connected to a cable and identity Boundary Scan Chain".

Unfortunately, impact detect only one FPGA. Which mistakes cause this happen: PINs are not correctly connected? impact is not properly adjusted? or something else?

thanks again

Regards, Cheng

AMONTEC schrieb:

Hi Cheng,

JTAG = Boundary Scan = large shift-register (TDI TDO signals) + state machine TAP control (TMS signal) JTAG is a synchronous bus (TCK signal), as a SPI bus.

If Xilinx Impact only detect one device, this means you only have one device in the JTAG chain. You maybe have jumpers (or 0 ohm resistors) on your board for routing the JTAG chain.

Regards, Laurent Gauch ____________________________

Bingo,

thanks!!!!!!!!!!!!! Laurent,

Yes, there is a jumper.

Best Regards, Cheng

AMONTEC schrieb:

Nice for you ;-)

Regards, Laurent Gauch ____________________________