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##
## DEVICE "EP3C40F484C6"
##
#**************************************************************
# Time Information
#**************************************************************
set_time_format -unit ns -decimal_places 3
#**************************************************************
# Create Clock
#**************************************************************
create_clock -name {clock_50} -period 20.000 [get_ports {clock_50_i}]
# Write and Read Clock for the EPCS16N-98364 device
#----------------------
create_clock -name epcs_wd_clk -period 25MHz [get_ports config_dclk_o]
create_clock -name epcs_rd_clk -period 20MHz -add [get_ports config_dclk_o]
# JTAG: constrain the TCK port [Quartus II TimeQuest Timing Analyzer Cookbook]
#-----------------------------------------------------------------------------
#create_clock -name tck -period 10MHz [get_ports altera_reserved_tck]
#**************************************************************
# Create Generated Clock (Used for Clock relations (PLL))
#**************************************************************
# connected via PLL (Normal Mode, -3ns phase shift
create_generated_clock -name pll_1_clk_3 -source [get_pins {sinet_pll|altpll_component|auto_generated|pll1|inclk[0]}] \
-phase -54.000 [get_pins {sinet_pll|altpll_component|auto_generated|pll1|clk[3]}]
create_generated_clock -name clock_dram -source [get_pins {sinet_pll|altpll_component|auto_generated|pll1|clk[3]}] \
[get_ports {dram_clk_o}]
#**************************************************************
# Set Clock Groups
#**************************************************************
# EPCS16N-98364 (EPCS): cut all paths between the write and read clock (just one of both is active at any time)
set_clock_groups -asynchronous -group [get_clocks epcs_wd_clk] -group [get_clocks epcs_rd_clk] -group [get_clocks {pll_1_clk_0}]
# JTAG: cut all paths to and from tck
#set_clock_groups -asynchronous -group [get_clocks tck]
#**************************************************************
# Set Clock Latency
#**************************************************************
#**************************************************************
# Set Clock Uncertainty
#**************************************************************
set_clock_uncertainty -from { pll_1_clk_0 } -to { pll_1_clk_0 } 0.2
set_clock_uncertainty -from { pll_1_clk_0 } -to { pll_1_clk_1 } 0.2
set_clock_uncertainty -from { pll_1_clk_0 } -to { clock_dram } 0.2
set_clock_uncertainty -from { pll_1_clk_1 } -to { pll_1_clk_1 } 0.2
set_clock_uncertainty -from { pll_1_clk_1 } -to { pll_1_clk_0 } 0.2
set_clock_uncertainty -from { pll_1_clk_2 } -to { pll_1_clk_2 } 0.2
set_clock_uncertainty -from { pll_1_clk_2 } -to { pll_1_clk_0 } 0.2
set_clock_uncertainty -from { et_phy_clk } -to { pll_1_clk_0 } 0.2
set_clock_uncertainty -from { clock_dram } -to { clock_dram } 0.2
set_clock_uncertainty -from { clock_dram } -to { pll_1_clk_0 } 0.2
set_clock_uncertainty -from { clock_ssram } -to { pll_1_clk_0 } 0.2
#**************************************************************
# Set Input Delay
#**************************************************************
# SDRAM Timing Constraints IS42S16800D-7TL
#-------------------
# CAS Latency (Latency = 3), Access Time From CLK: t_AC = 6.5 ns
set_input_delay -max -clock [get_clocks {clock_dram}] 6.500 [get_ports {dram_d_io[*]}]
# CAS Latency (Latency = 3), Output Data Hold Time: t_OH = 2.7 ns
set_input_delay -min -clock [get_clocks {clock_dram}] 2.700 [get_ports {dram_d_io[*]}]
# EPCS16N-98364 (EPCS)
#-------------------
# Read Operation Timing, Clock Falling Edge to Data: t_nCLK2D = 15 ns (FROM FALLING CLOCK EDGE)
set_input_delay -max -clock_fall -clock epcs_rd_clk 15.000 [get_ports {config_data0_i}]
# Read Operation Timing, Output Hold time is not known, therfore we chosse 0 ns (FROM FALLING CLOCK EDGE)
set_input_delay -min -clock_fall -clock epcs_rd_clk 0.000 [get_ports {config_data0_i}]
# JTAG: constrain the TDI and TMS port [Quartus II TimeQuest Timing Analyzer Cookbook]
#-------------------------------------------------------------------------------------
#set_input_delay -clock tck 20 \
# [get_ports altera_reserved_tdi]
#set_input_delay -clock tck 20 \
# [get_ports altera_reserved_tms]
#**************************************************************
# Set Output Delay
#**************************************************************
# SDRAM Timing Constraints IS42S16800D-7TL
#-------------------
# Address/Input Data/CKE/COMMAND Setup Time: t_AS, t_DS, t_CKS, t_CS = 1.5 ns
set_output_delay -max -clock [get_clocks {clock_dram}] 1.500 [get_ports {dram_a_o[*] dram_d_io[*] \
dram_cke_o dram_ba?_n_o dram_cs_n_o \
dram_ras_n_o dram_cas_n_o dram_we_n_o dram_ldqm_o dram_udqm_o}]
# Address/Input Data/CKE/COMMAND Hold Time: t_AH, t_DH, t_CKH, t_CH = 0.8 ns
set_output_delay -min -clock [get_clocks {clock_dram}] -0.800 [get_ports {dram_a_o[*] dram_d_io[*] \
dram_cke_o dram_ba?_n_o dram_cs_n_o \
dram_ras_n_o dram_cas_n_o dram_we_n_o dram_ldqm_o dram_udqm_o}]
# EPCS16N-98364 (EPCS)
#-------------------
# Write Operation Timing, Data In Setup time: t_DSU = 5 ns
set_output_delay -max -clock epcs_wd_clk 5.000 [get_ports config_asd0_o]
# Write Operation Timing, Data In Hold time: t_DH = 5 ns
set_output_delay -min -clock epcs_wd_clk -5.000 [get_ports config_asd0_o]
# Write Operation Timing, Chip select Setup time: t_NCSSU = 10 ns
set_output_delay -max -clock epcs_wd_clk 10.000 [get_ports config_ce_n_o]
# Write Operation Timing, Chip select Hold time: t_NCSH = 10 ns
set_output_delay -min -clock epcs_wd_clk -10.000 [get_ports config_ce_n_o]
# JTAG: constrain the TDO port [Quartus II TimeQuest Timing Analyzer Cookbook]
#-----------------------------------------------------------------------------
#set_output_delay -clock tck 20 \
# [get_ports altera_reserved_tdo]
#**************************************************************
# Set False Path
#**************************************************************
# Main input reset
#-------------------
set_false_path -from [get_ports {fpga_reset_n_i}]
# NIOS CPU
#-------------------
# Nios uart signals (RS232)
set_false_path -from [get_ports {nios_uart_rxd_i}]
set_false_path -to [get_ports {nios_uart_txd_o}]
# GP-LEDs
#-------------------
set_false_path -to [get_ports {gp_led_o[*] gen_led_g_o[*] gen_led_r_o[*]}]
# Switch Input
#-------------------
set_false_path -from [get_ports {switch_i[*]}]
# Reserve Pins
#-------------------
set_false_path -from [get_ports {reserve?_i}]
# Parallel Flash (S29AL032D 70TF100)
# timing is to do in SOPC System
#-------------------
set_false_path -from [get_ports {flash_d_io[*]}]
set_false_path -to [get_ports {flash_d_io[*] flash_a_o[*] flash_we_n_o flash_reset_n_o flash_oe_n_o flash_ce_n_o fash_acc_o}]
#**************************************************************
# Set Multicycle Path
#**************************************************************
# compensate the negative phase shift of the output SDRAM clock for hold check
# clock_50 ___|----|____|----|
# clock_dram_pll __|----|____|----|
# Compensate setup path from clock_50 to clock_dram_pll
set_multicycle_path -from [get_clocks pll_1_clk_0] \
-to [get_clocks clock_dram] \
-setup -end 1
# Compensate hold path from clock_dram_pll to clock_50 (default sdc configuration)
set_multicycle_path -from [get_clocks pll_1_clk_0] \
-to [get_clocks clock_dram] \
-hold -start 0
# clock_dram_pll __|----|____|----|
# clock_50 ___|----|____|----|
# Compensate setup path from clock_dram_pll to clock_50
set_multicycle_path -from [get_clocks clock_dram] \
-to [get_clocks pll_1_clk_0] \
-setup -start 2
# Hold is already correct and has not to be defined
#set_multicycle_path -from [get_clocks {clock_50}] \
# -to [get_fanouts [get_registers {clk_50_en}]] \
# -hold -end 1
#**************************************************************
# Set Input Transition
#**************************************************************
#**************************************************************
# Set Load
#**************************************************************
|
