Altera Serial Digital Interface (SDI) MegaCore Function Bedienungsanleitung Seite 130

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 140
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 129
A–8 Appendix A: Constraints
Constraints for the SDI Soft Transceiver
Serial Digital Interface (SDI) MegaCore Function February 2013 Altera Corporation
User Guide
Non Cyclone Devices
These constraints apply to all device families (excluding Cyclone, but including
Cyclone II , Cyclone III and Cyclone IV devices) that are configured to use a soft
transceiver for their receivers.
Define the following setup and hold relationship between the 135-MHz clocks and the
337.5-MHz zero-degree clocks:
Setup—1.5 clocks (4.43 ns) from the 337.5-MHz zero-degree clock to the 135-MHz
clock
Hold—zero clocks from the 337.5-MHz clock to the 135-MHz clock
If you choose to include the PLLs inside the MegaCore function, modify the following
constraints and apply them to your design. Alternatively, apply similar constraints to
the clocks connected to the
rx_sd_refclk_337
and
rx_sd_refclk_135
signals on your
SDI MegaCore function.
Classic Timing Analyzer
Use the following constraints for the Classic timing analyzer:
set_instance_assignment -name SETUP_RELATIONSHIP "4.43 ns" -from
“<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk0" -to
"<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk2"
set_instance_assignment -name HOLD_RELATIONSHIP "0 ns" -from
"<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk0" -to
"<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk2"
TimeQuest Timing Analyzer
Use the following constraints for the TimeQuest timing analyzer:
set_max_delay 4.43 -from
{<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk0} -to
{<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk2}
set_min_delay 0 -from {
<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_i
nst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpll
_component|_clk0} -to
{<your_megacore:your_megacore_inst>|sdi_megacore_top:sdi_megacore_top_
inst|sdi_clocks:u_sdi_clocks|stratix_c2_pll_sclk:u_rx_pll|altpll:altpl
l_component|_clk2}
Seitenansicht 129
1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 139 140

Kommentare zu diesen Handbüchern

Keine Kommentare