isp8.sdc

简单的8位CPU

# Synplicity, Inc. constraint file
# C:\isp8_sb\synthesis\xp\synplicity\config1\core\isp8.sdc
# Written on Wed Jun 01 13:06:02 2005
# by Synplify, Synplify 8.0B Scope Editor

#
# Clocks
#
define_clock            -name {clk}  -freq 100.000 -clockgroup default_clkgroup

#
# Clock to Clock
#

#
# Inputs/Outputs
#
define_output_delay              {ext_addr[7:0]}  9.00 -improve 0.00 -route 0.00
define_output_delay              {ext_dout[7:0]}  9.00 -improve 0.00 -route 0.00
define_output_delay              {ext_io_rd}  9.00 -improve 0.00 -route 0.00
define_output_delay              {ext_io_wr}  9.00 -improve 0.00 -route 0.00
define_output_delay              {ext_mem_rd}  9.00 -improve 0.00 -route 0.00
define_output_delay              {ext_mem_wr}  9.00 -improve 0.00 -route 0.00
define_output_delay              {intr_ack}  9.00 -improve 0.00 -route 0.00
define_input_delay               {ext_io_din[7:0]}  9.00 -improve 0.00 -route 0.00
define_input_delay               {ext_mem_din[7:0]}  9.00 -improve 0.00 -route 0.00
define_input_delay               {intr}  9.00 -improve 0.00 -route 0.00

#
# Registers
#

#
# Multicycle Path
#

#
# False Path
#
define_false_path           -from {p:rst_n} 

#
# Path Delay
#

#
# Attributes
#
define_attribute          {clk} orca_padtype {IB}
define_attribute          {rst_n} orca_padtype {IB}
define_attribute          {ext_mem_din[7:0]} orca_padtype {IB}
define_attribute          {ext_io_din[7:0]} orca_padtype {IB}
define_attribute          {intr} orca_padtype {IB}
define_attribute          {ext_addr[7:0]} orca_padtype {OB}
define_attribute          {ext_dout[7:0]} orca_padtype {OB}
define_attribute          {ext_mem_wr} orca_padtype {OB}
define_attribute          {ext_io_wr} orca_padtype {OB}
define_attribute          {ext_mem_rd} orca_padtype {OB}
define_attribute          {ext_io_rd} orca_padtype {OB}
define_attribute          {intr_ack} orca_padtype {OB}
define_global_attribute          syn_use_carry_chain {1}
define_attribute          {v:work.isp8} syn_hier {flatten}

#
# I/O standards
#

#
# Other Constraints
#