Subversion Repositories versatile_mem_ctrl

#**************************************************************

# Timimg Information for DDR2 SDRAM

#**************************************************************

# Timing specifications from Micron Data Sheet (DDR2 SDRAM MT47H32M16-5E)

# Clock cycle time: min=5.00ns, max=8.00ns

set tCK 5.000

# Data Strobe Out

# DQS output access time from CK/CK#

set tDQSCKmin -0.500

set tDQSCKmax  0.500

# Data Strobe In

# DQS rising edge to CK rising edge

set tDQSSmin [expr -0.25 * $tCK]

set tDQSSmax [expr 0.25 * $tCK]

# DQS falling to CK rising: setup time

set tDSSmin [expr 0.2 * $tCK]

# DQS falling from CK rising: hold time

set tDSHmin [expr 0.2 * $tCK]

# Data Out

# DQ output access time from CK/CK#

set tACmin -0.600

set tACmax  0.600

# Data In

# DQ and DM input setup time to DQS

set tDSb 0.150

# DQ and DM input hold time to DQS

set tDHb 0.275

# DQ and DM input setup time to DQS

set tDSa 0.400

# DQ and DM input hold time to DQS

set tDHa 0.400

# Command and Address

# Input setup time

set tISb 0.350

set tISa 0.600

# Input hold time

set tIHb 0.470

set tIHa 0.600

#**************************************************************

# Timimg Information

#**************************************************************

# Trace delay for data

set tTDDmin 0.100

set tTDDmax 0.200

# Trace delay for clock

set tTDCmin  0.100

set tTDCmax  0.200

#**************************************************************

# Create Clock

#**************************************************************

# Clock frequency

set wb_clk_period 20.000

set sdram_clk_period $tCK

# Clocks

create_clock -name {wb_clk}    -period $wb_clk_period    [get_ports {wb_clk}]

create_clock -name {sdram_clk} -period $sdram_clk_period [get_ports {sdram_clk}]

# Virtual clocks

#create_clock -name {v_wb_clk_in}     -period $wb_clk_period

#create_clock -name {v_wb_clk_out}    -period $wb_clk_period

#create_clock -name {v_sdram_clk_in}  -period $sdram_clk_period

#create_clock -name {v_sdram_clk_out} -period $sdram_clk_period

#**************************************************************

# Create Generated Clock

#**************************************************************

create_generated_clock -name sdram_clk_0 -phase 0 -source [get_ports {sdram_clk}] [get_pins {dcm_pll_0|altpll_internal|auto_generated|pll1|clk[0]}]

create_generated_clock -name sdram_clk_180 -phase 180 -source [get_ports {sdram_clk}] [get_pins {dcm_pll_0|altpll_internal|auto_generated|pll1|clk[2]}]

create_generated_clock -name sdram_clk_270 -phase 270 -source [get_ports {sdram_clk}] [get_pins {dcm_pll_0|altpll_internal|auto_generated|pll1|clk[3]}]

create_generated_clock -name ck_pad_o -phase 0 -source [get_pins {ddr_ff_out_inst_2|altddio_out_inst|auto_generated|ddio_outa[0]|clkhi}] [get_ports ck_pad*]

#**************************************************************

# Set Clock Latency

#**************************************************************

#**************************************************************

# Set Clock Uncertainty

#**************************************************************

derive_clock_uncertainty

#**************************************************************

# Set Input Delay

#**************************************************************

# Double Data Rate requires constraints for both rising and falling clock edge

# Input max delay value = max trace delay for data + tCO of external device – min trace delay for clock

# Input min delay value = min trace delay for data + tCOmin of external device – max trace delay for clock

# Assume (for now): max trace delay for data = min trace delay for clock

#                   min trace delay for data = max trace delay for clock

# Data

set_input_delay -clock {ck_pad_o} -max $tACmax             [get_ports {dq_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -max $tACmax -clock_fall [get_ports {dq_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tACmin             [get_ports {dq_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tACmin -clock_fall [get_ports {dq_pad_io[*]}] -add_delay

# Data Strobe

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax             [get_ports {dqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax -clock_fall [get_ports {dqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin             [get_ports {dqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin -clock_fall [get_ports {dqs_pad_io[*]}] -add_delay

# Data Strobe

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax             [get_ports {dqs_n_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax -clock_fall [get_ports {dqs_n_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin             [get_ports {dqs_n_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin -clock_fall [get_ports {dqs_n_pad_io[*]}] -add_delay

# Data Mask

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax             [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -max $tDQSCKmax -clock_fall [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin             [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_input_delay -clock {ck_pad_o} -min $tDQSCKmin -clock_fall [get_ports {dm_rdqs_pad_io[*]}] -add_delay

# Single Data Rate requires constraints for rising clock edge only

#**************************************************************

# Set Output Delay

#**************************************************************

# Double Data Rate requires constraints for both rising and falling clock edge

# Output max delay = max trace delay for data + tSU of external register – min trace delay for clock

# Output min delay = min trace delay for data – tH of external register – max trace delay for clock

# Assume (for now): max trace delay for data = min trace delay for clock

#                   min trace delay for data = max trace delay for clock

# Data

set_output_delay -clock {ck_pad_o} -max $tISa              [get_ports {dq_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -max $tISa  -clock_fall [get_ports {dq_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa             [get_ports {dq_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa -clock_fall [get_ports {dq_pad_io[*]}] -add_delay

# Data Strobe

set_output_delay -clock {ck_pad_o} -max $tISa              [get_ports {dqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -max $tISa  -clock_fall [get_ports {dqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa             [get_ports {dqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa -clock_fall [get_ports {dqs_pad_io[*]}] -add_delay

# Data Strobe

set_output_delay -clock {ck_pad_o} -max $tISa              [get_ports {dqs_n_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -max $tISa  -clock_fall [get_ports {dqs_n_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa             [get_ports {dqs_n_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa -clock_fall [get_ports {dqs_n_pad_io[*]}] -add_delay

# Data Mask

set_output_delay -clock {ck_pad_o} -max $tISa              [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -max $tISa  -clock_fall [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa             [get_ports {dm_rdqs_pad_io[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa -clock_fall [get_ports {dm_rdqs_pad_io[*]}] -add_delay

# Single Data Rate requires constraints for rising clock edge only

# Chip Select

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {cs_n_pad_o}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {cs_n_pad_o}] -add_delay

# Row Address Strobe

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {ras_pad_o}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {ras_pad_o}] -add_delay

# Column Address Strobe

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {cas_pad_o}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {cas_pad_o}] -add_delay

# Write Enable

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {we_pad_o}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {we_pad_o}] -add_delay

# Bank Address

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {ba_pad_o[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {ba_pad_o[*]}] -add_delay

# Address

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {addr_pad_o[*]}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {addr_pad_o[*]}] -add_delay

# Clock Enable

set_output_delay -clock {ck_pad_o} -max $tISa  [get_ports {cke_pad_o}] -add_delay

set_output_delay -clock {ck_pad_o} -min -$tIHa [get_ports {cke_pad_o}] -add_delay

#**************************************************************

# Set Clock Groups

#**************************************************************

#**************************************************************

# Set False Path

#**************************************************************

# Reset

set_false_path -from [get_ports {wb_rst}]

# Input Timing Exceptions

# False path exceptions for opposite-edge transfer

# Data

set_false_path -setup -fall_from [get_clocks ck_pad_o] -rise_to [get_clocks sdram_clk_270]

set_false_path -setup -rise_from [get_clocks ck_pad_o] -fall_to [get_clocks sdram_clk_270]

set_false_path -hold  -rise_from [get_clocks ck_pad_o] -fall_to [get_clocks sdram_clk_270]

set_false_path -hold  -fall_from [get_clocks ck_pad_o] -rise_to [get_clocks sdram_clk_270]

# Data Strobe

#set_false_path -setup -fall_from [get_clocks ck_pad_o] -rise_to [get_clocks sdram_clk_0]

#set_false_path -setup -rise_from [get_clocks ck_pad_o] -fall_to [get_clocks sdram_clk_0]

#set_false_path -hold  -rise_from [get_clocks ck_pad_o] -fall_to [get_clocks sdram_clk_0]

#set_false_path -hold  -fall_from [get_clocks ck_pad_o] -rise_to [get_clocks sdram_clk_0]

# Output Timing Exceptions

# False path exceptions for opposite-edge transfer

# Data

set_false_path -setup -rise_from [get_clocks sdram_clk_270] -fall_to [get_clocks ck_pad_o]

set_false_path -setup -fall_from [get_clocks sdram_clk_270] -rise_to [get_clocks ck_pad_o]

set_false_path -hold  -rise_from [get_clocks sdram_clk_270] -rise_to [get_clocks ck_pad_o]

set_false_path -hold  -fall_from [get_clocks sdram_clk_270] -fall_to [get_clocks ck_pad_o]

# Data Strobe

set_false_path -setup -rise_from [get_clocks sdram_clk_0] -fall_to [get_clocks ck_pad_o]

set_false_path -setup -fall_from [get_clocks sdram_clk_0] -rise_to [get_clocks ck_pad_o]

set_false_path -hold  -rise_from [get_clocks sdram_clk_0] -rise_to [get_clocks ck_pad_o]

set_false_path -hold  -fall_from [get_clocks sdram_clk_0] -fall_to [get_clocks ck_pad_o]

#**************************************************************

# Set Multicycle Path

#**************************************************************

#**************************************************************

# Set Maximum Delay

#**************************************************************

#**************************************************************

# Set Minimum Delay

#**************************************************************

#**************************************************************

# Set Input Transition

#**************************************************************