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#======================================================================
#
# novena_eim.ucf
# -------------------
# Constraint file for implementing the Cryptech Novena base
# for the Xilinx Spartan6 LX45 on the Novena.
#
#
# Author: Pavel Shatov
# Copyright (c) 2014, NORDUnet A/S All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
# - Neither the name of the NORDUnet nor the names of its contributors may
#   be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#======================================================================

#-------------------------------------------------------------------------------
CONFIG  VCCAUX = 3.3;
#-------------------------------------------------------------------------------


#--------------------------------------------------------------------------------
# GCLK Timing
#--------------------------------------------------------------------------------
NET  "gclk_p_pin" TNM_NET = TNM_gclk;
TIMESPEC  TS_gclk = PERIOD TNM_gclk 20 ns HIGH 50%;


#-------------------------------------------------------------------------------
# BCLK Timing
#-------------------------------------------------------------------------------
NET  "eim_bclk" TNM_NET = TNM_bclk;
TIMESPEC  TS_bclk = PERIOD TNM_bclk 30 ns HIGH 50%;


#-------------------------------------------------------------------------------
# FPGA Pinout
#-------------------------------------------------------------------------------
NET  "led_pin"         LOC = "A16" | IOSTANDARD = "LVCMOS33" | SLEW = "SLOW" | DRIVE = 12;
NET  "apoptosis_pin"   LOC = "K1"  | IOSTANDARD = "LVCMOS33" | SLEW = "SLOW" | DRIVE = 12;
NET  "reset_mcu_b_pin" LOC = "F1"  | IOSTANDARD = "LVCMOS33" | PULLUP;

NET  "gclk_p_pin"      LOC = "H2"  | IOSTANDARD = "LVDS_33"  | DIFF_TERM = "TRUE";
NET  "gclk_n_pin"      LOC = "H1"  | IOSTANDARD = "LVDS_33"  | DIFF_TERM = "TRUE";

NET  "eim_bclk"        LOC = "C9"  | IOSTANDARD = "LVCMOS33";
NET  "eim_cs0_n"       LOC = "B11" | IOSTANDARD = "LVCMOS33";

NET  "eim_da<0>"       LOC = "G9"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<1>"       LOC = "A10" | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<2>"       LOC = "F9"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<3>"       LOC = "B9"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<4>"       LOC = "E13" | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<5>"       LOC = "F13" | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<6>"       LOC = "A9"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<7>"       LOC = "A8"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<8>"       LOC = "B8"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<9>"       LOC = "D8"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<10>"      LOC = "D11" | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<11>"      LOC = "C8"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<12>"      LOC = "C7"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<13>"      LOC = "C11" | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<14>"      LOC = "C4"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;
NET  "eim_da<15>"      LOC = "B6"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;

NET  "eim_a<16>"       LOC = "A11" | IOSTANDARD = "LVCMOS33";
NET  "eim_a<17>"       LOC = "B12" | IOSTANDARD = "LVCMOS33";
NET  "eim_a<18>"       LOC = "D14" | IOSTANDARD = "LVCMOS33";

NET  "eim_lba_n"       LOC = "B14" | IOSTANDARD = "LVCMOS33";
NET  "eim_wr_n"        LOC = "C14" | IOSTANDARD = "LVCMOS33";
NET  "eim_oe_n"        LOC = "C10" | IOSTANDARD = "LVCMOS33";
NET  "eim_wait_n"      LOC = "A7"  | IOSTANDARD = "LVCMOS33" | SLEW = "FAST" | DRIVE = 12;

# Pins to the header where the LEDs on the Cryptech
# Avalanche Noise Board are connected.
NET  "ct_led<0>" LOC = K6 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<1>" LOC = H4 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<2>" LOC = H3 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<3>" LOC = M1 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<4>" LOC = L7 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<5>" LOC = G1 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<6>" LOC = T2 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;
NET  "ct_led<7>" LOC = H7 | IOSTANDARD = LVCMOS33 | SLEW = SLOW;

# Pins to the header where the noise sources on the
# Cryptech Avalanche Noise Board are connected.
NET  "ct_noise"  LOC = L4 | IOSTANDARD = LVCMOS33;

#-------------------------------------------------------------------------------
# EIM Input Timing
#-------------------------------------------------------------------------------
NET  "eim_cs0_n" TNM = "TNM_EIM_IN";
NET  "eim_da<*>" TNM = "TNM_EIM_IN";
NET  "eim_lba_n" TNM = "TNM_EIM_IN";
NET  "eim_wr_n"  TNM = "TNM_EIM_IN";
NET  "eim_oe_n"  TNM = "TNM_EIM_IN";

TIMEGRP  "TNM_EIM_IN" OFFSET = IN 9.75 ns VALID 16.0 ns BEFORE "eim_bclk" RISING;


#-------------------------------------------------------------------------------
# EIM Output Timing
#-------------------------------------------------------------------------------
NET  "eim_da<*>"  TNM = "TNM_EIM_OUT";
NET  "eim_wait_n" TNM = "TNM_EIM_OUT";

TIMEGRP  "TNM_EIM_OUT" OFFSET = OUT 13.0 ns AFTER "eim_bclk" FALLING;


#-------------------------------------------------------------------------------
# CDC Paths
#-------------------------------------------------------------------------------
INST  "eim/eim/eim_cdc/cdc_eim_sys/src_ff"     TNM = "TNM_from_bclk";
INST  "eim/eim/eim_cdc/cdc_eim_sys/src_latch*" TNM = "TNM_from_bclk";
INST  "eim/eim/eim_cdc/cdc_eim_sys/ff_sync*"   TNM = "TNM_to_sys_clk";
INST  "eim/eim/eim_cdc/cdc_eim_sys/dst_latch*" TNM = "TNM_to_sys_clk";

INST  "eim/eim/eim_cdc/cdc_sys_eim/src_ff"     TNM = "TNM_from_sys_clk";
INST  "eim/eim/eim_cdc/cdc_sys_eim/src_latch*" TNM = "TNM_from_sys_clk";
INST  "eim/eim/eim_cdc/cdc_sys_eim/ff_sync*"   TNM = "TNM_to_bclk";
INST  "eim/eim/eim_cdc/cdc_sys_eim/dst_latch*" TNM = "TNM_to_bclk";

TIMESPEC  "TS_bclk_2_sys_clk" = FROM "TNM_from_bclk"    TO "TNM_to_sys_clk" TIG;
TIMESPEC  "TS_sys_clk_2_bclk" = FROM "TNM_from_sys_clk" TO "TNM_to_bclk"    TIG;

#======================================================================
# EOF novena_eim.ucf
#======================================================================