diff options
| -rw-r--r-- | ucf/alpha_fmc.ucf | 66 |
1 files changed, 43 insertions, 23 deletions
diff --git a/ucf/alpha_fmc.ucf b/ucf/alpha_fmc.ucf index 7926762..908f9fe 100644 --- a/ucf/alpha_fmc.ucf +++ b/ucf/alpha_fmc.ucf @@ -46,31 +46,28 @@ #------------------------------------------------------------------------------- -# FMC_CLK Timing (can be up to 90 MHz) +# FMC_CLK Timing #------------------------------------------------------------------------------- NET "fmc_clk" TNM_NET = TNM_fmc_clk; -# 90 MHz -#TIMESPEC TS_fmc_clk = PERIOD TNM_fmc_clk 11.111 ns HIGH 50%; - -# 60 MHz -TIMESPEC TS_fmc_clk = PERIOD TNM_fmc_clk 16.667 ns HIGH 50%; +# 45 MHz +TIMESPEC TS_fmc_clk = PERIOD TNM_fmc_clk 22.222 ns HIGH 50%; #------------------------------------------------------------------------------- # FPGA Pinout #------------------------------------------------------------------------------- # -NET "led_pins<0>" LOC = "U3"; -NET "led_pins<1>" LOC = "T1"; -NET "led_pins<2>" LOC = "W22"; -NET "led_pins<3>" LOC = "AA20"; +NET "led_pins<0>" LOC = "U3"; +NET "led_pins<1>" LOC = "T1"; +NET "led_pins<2>" LOC = "W22"; +NET "led_pins<3>" LOC = "AA20"; # -NET "led_pins<*>" IOSTANDARD = "LVCMOS33"; -NET "led_pins<*>" SLEW = SLOW; -NET "led_pins<*>" DRIVE = 8; +NET "led_pins<*>" IOSTANDARD = "LVCMOS33"; +NET "led_pins<*>" SLEW = SLOW; +NET "led_pins<*>" DRIVE = 8; # -NET "gclk_pin" LOC = "D17" | IOSTANDARD = "LVCMOS33" ; +#NET "gclk_pin" LOC = "D17" | IOSTANDARD = "LVCMOS33" ; # NET "fmc_clk" LOC = "W11" | IOSTANDARD = "LVCMOS33" ; NET "fmc_ne1" LOC = "V5" | IOSTANDARD = "LVCMOS33" ; @@ -155,34 +152,57 @@ NET "mkm_do" LOC = "Y1" | IOSTANDARD = "LVCMOS33" ; # MKM_FPGA_MISO # Control signals NE1, NL and NWE all have different timing values. # Instead of writing individual constraints for every control signal, the most # strict constraint is applied to all control signals. This should not cause -# any P&R issues, since Spartan-6 (and Artix-7) can handle 90 MHz easily. +# any P&R issues, since Spartan-6 (and Artix-7) can handle 45 MHz very easily. # # NOE signal is not constrained, since it drives "T" input of IOBUF primitive. # -# Data and Address buses also have different timings, with Data bus timing being +# Data and Address buses also have different timings, with Address bus timing being # more strict. # -# Oh, and the datasheet doesn't explicitly specify hold time for the data bus. +# Oh, and the datasheet doesn't explicitly specify hold time for the data bus. But that +# is not a problem, since it's apparently impossible to specify both OFFSET OUT BEFORE +# and AFTER at the same time :) # +# "ideal" values +#TIMEGRP "TNM_FMC_IN_DATA" OFFSET = IN 8.5 ns VALID 19.5 ns BEFORE "fmc_clk" RISING ; +#TIMEGRP "TNM_FMC_IN_ADDR" OFFSET = IN 11.0 ns VALID 11.0 ns BEFORE "fmc_clk" RISING ; +#TIMEGRP "TNM_FMC_IN_CONTROL" OFFSET = IN 10.5 ns VALID 15.5 ns BEFORE "fmc_clk" RISING ; + +# more realistic ("strict") values with 1 ns subtracted from both sides of the +# valid window +TIMEGRP "TNM_FMC_IN_DATA" OFFSET = IN 7.5 ns VALID 17.5 ns BEFORE "fmc_clk" RISING ; +TIMEGRP "TNM_FMC_IN_ADDR" OFFSET = IN 10.0 ns VALID 9.0 ns BEFORE "fmc_clk" RISING ; +TIMEGRP "TNM_FMC_IN_CONTROL" OFFSET = IN 9.5 ns VALID 13.5 ns BEFORE "fmc_clk" RISING ; + NET "fmc_d<*>" TNM = "TNM_FMC_IN_DATA" ; NET "fmc_a<*>" TNM = "TNM_FMC_IN_ADDR" ; - +# NET "fmc_ne1" TNM = "TNM_FMC_IN_CONTROL" ; NET "fmc_nl" TNM = "TNM_FMC_IN_CONTROL" ; NET "fmc_nwe" TNM = "TNM_FMC_IN_CONTROL" ; -TIMEGRP "TNM_FMC_IN_DATA" OFFSET = IN 3.0 ns VALID 8.5 ns BEFORE "fmc_clk" RISING ; -TIMEGRP "TNM_FMC_IN_ADDR" OFFSET = IN 5.5 ns VALID 5.5 ns BEFORE "fmc_clk" RISING ; -TIMEGRP "TNM_FMC_IN_CONTROL" OFFSET = IN 5.0 ns VALID 10.0 ns BEFORE "fmc_clk" RISING ; - #------------------------------------------------------------------------------- # FMC Output Timing #------------------------------------------------------------------------------- +TIMEGRP "TNM_FMC_OUT_DATA" OFFSET = OUT 6.0 ns BEFORE "fmc_clk" FALLING; #+1ns + NET "fmc_d<*>" TNM = "TNM_FMC_OUT_DATA" ; -TIMEGRP "TNM_FMC_OUT_DATA" OFFSET = OUT 6.0 ns AFTER "fmc_clk" RISING; + +#------------------------------------------------------------------------------- +# Core Selector Multi-Cycle Readback Mux +#------------------------------------------------------------------------------- +NET "cores/reg_read_data_*<*>" TNM_NET = TNM_CORE_SELECTOR_MUX_INPUT ; +NET "cores/addr_core_num_dly2<*>" TNM_NET = TNM_CORE_SELECTOR_MUX_CONTROL ; +NET "cores/pipe_read_data_*<*>" TNM_NET = TNM_CORE_SELECTOR_MUX_OUTPUT ; + +TIMEGRP "TNM_CORE_SELECTOR_MUX_SRC" = "TNM_CORE_SELECTOR_MUX_INPUT" "TNM_CORE_SELECTOR_MUX_CONTROL" ; +TIMEGRP "TNM_CORE_SELECTOR_MUX_DST" = "TNM_CORE_SELECTOR_MUX_OUTPUT" ; + +TIMESPEC TS_core_selector = FROM TNM_CORE_SELECTOR_MUX_SRC TO TNM_CORE_SELECTOR_MUX_DST TS_clkmgr_mmcm_inst_mmcm_clkout0 * 2 ; + #====================================================================== |