I want to know the max speed of NIOS ii based on cyclone iii EP3C120N780C

Thank you for your prompt.

The constraining on resrt_n is working,all unconstrained paths has beed cut.

But the critical warning cause by JTAG still exist.

The TimeQuest report negative slack(-2.435) in Summary(Removal) of altera_reserved_tck.

The Top Failing Paths (Removal:altera_reserved_tck) is this:

Slack:-2.435

From---altera_reserved_tck

To-----pzdyqx:nabboc|pzdyqx_impl:zdyqx_impl_inst|FNUJ6967

I've tried to slow down the DDR2 clock to 133.333MHz,the NIOS clock down to 66.667MHz,but the slack value still negative.

The constrainning code:

derive_pll_clocks -create_base_clocks

set_clock_groups -asynchronous -group [get_clocks altera_reserved_tck]

set_input_delay -clock altera_reserved_tck -clock_fall 1 [get_ports altera_reserved_tdi]

set_input_delay -clock altera_reserved_tck -clock_fall 1 [get_ports altera_reserved_tms]

set_output_delay -clock altera_reserved_tck -clock_fall 1 [get_ports altera_reserved_tdo]