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#
#     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
#     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
#     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
#     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
#     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
#     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
#     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
#     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
#     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
#     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
#     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
#     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
#     FOR A PARTICULAR PURPOSE.
#     
#     (c) Copyright 2005 Xilinx, Inc.
#     All rights reserved.
#

# Bus clock nets
NET "sys_clk"  TNM_NET = "sys_clk";
NET "tft_clk"  TNM_NET = "tft_clk";
NET sys_clk_in TNM_NET = "sys_clk_in";
TIMESPEC "TSSYSCLK" = PERIOD "sys_clk_in" 9.9 ns HIGH 50 %;

NET sys_clk_in LOC = AE14;
NET sys_clk_in IOSTANDARD = LVCMOS33;
NET sys_rst_in LOC = D6;
NET sys_rst_in PULLUP;
NET sys_rst_in TIG;

NET uart_RX LOC = W2;
NET uart_RX IOSTANDARD = LVCMOS33;
NET uart_RX TIG;
NET uart_TX LOC = W1;
NET uart_TX IOSTANDARD = LVCMOS33;
NET uart_TX TIG;

NET ext_irq TIG;

# Reset timing ignore - treat as async paths
NET sys_rst TIG;
NET opb_v20_0_OPB_Rst TIG;
NET lmb_v10_1_OPB_Rst TIG;
NET lmb_v10_0_OPB_Rst TIG;
NET opb_v20_0_Debug_SYS_Rst TIG;
NET Debug_Rst TIG;
NET plb_v34_0_PLB_Rst TIG;
NET dcm_locked TIG;

# Locate DCM/BUFG - Tools can probably figure them out automatically
#                   but just LOC them down to be safe
INST dcm_0/dcm_0/DCM_ADV_INST LOC = DCM_ADV_X0Y2;
INST dcm_1/dcm_1/DCM_ADV_INST LOC = DCM_ADV_X0Y4;
INST dcm_2/dcm_2/DCM_ADV_INST LOC = DCM_ADV_X0Y1;

INST dcm_0/dcm_0/CLK0_BUFG_INST  LOC = BUFGCTRL_X0Y0;
INST dcm_0/dcm_0/CLK90_BUFG_INST LOC = BUFGCTRL_X0Y1;
INST dcm_0/dcm_0/CLKDV_BUFG_INST LOC = BUFGCTRL_X0Y2;

INST dcm_1/dcm_1/CLK0_BUFG_INST  LOC = BUFGCTRL_X0Y31;
INST dcm_1/dcm_1/CLK90_BUFG_INST LOC = BUFGCTRL_X0Y30;

////////////////////////////////////////////////////////////////////////////
// Buttons, LEDs, and DIP Switches 
////////////////////////////////////////////////////////////////////////////

# GPLED 0-3
NET gpio<0>  LOC = G5;  #GPLED0
NET gpio<1>  LOC = G6;  #GPLED1
NET gpio<2>  LOC = A11; #GPLED2
NET gpio<3>  LOC = A12; #GPLED3
# North-East-South-West-Center LEDs
NET gpio<4>  LOC = C6;  # C LED
NET gpio<5>  LOC = F9;  # W LED
NET gpio<6>  LOC = A5;  # S LED
NET gpio<7>  LOC = E10; # E LED
NET gpio<8>  LOC = E2;  # N LED
# North-East-South-West-Center Buttons
NET gpio<9>  LOC = B6;  # C Button
NET gpio<10> LOC = E9;  # W Button
NET gpio<11> LOC = A6;  # S Button
NET gpio<12> LOC = F10; # E Button
NET gpio<13> LOC = E7;  # N Button
# Dip Switches 1-8
NET gpio<14> LOC = U24; # DIP SW 8
NET gpio<15> LOC = U25; # DIP SW 7
NET gpio<16> LOC = V23; # DIP SW 6
NET gpio<17> LOC = U23; # DIP SW 5
NET gpio<18> LOC = U26; # DIP SW 4
NET gpio<19> LOC = T26; # DIP SW 3
NET gpio<20> LOC = R19; # DIP SW 2
NET gpio<21> LOC = R20; # DIP SW 1
NET gpio<14> IOSTANDARD = LVCMOS33;
NET gpio<15> IOSTANDARD = LVCMOS33;
NET gpio<16> IOSTANDARD = LVCMOS33;
NET gpio<17> IOSTANDARD = LVCMOS33;
NET gpio<18> IOSTANDARD = LVCMOS33;
NET gpio<19> IOSTANDARD = LVCMOS33;
NET gpio<20> IOSTANDARD = LVCMOS33;
NET gpio<21> IOSTANDARD = LVCMOS33;
#SMA Connectors
NET gpio<22> LOC = C12; # SMA_IN_N
NET gpio<23> LOC = C13; # SMA_IN_P
NET gpio<24> LOC = D7;  # SMA_OUT_N
NET gpio<25> LOC = D8;  # SMA_OUT_P
NET gpio<26> LOC = AD12;# USERCLK
NET gpio<26> IOSTANDARD = LVCMOS33;

NET "gpio<*>" PULLDOWN;
NET "gpio<*>" TIG;
NET "gpio<*>" SLEW = SLOW;
NET "gpio<*>" DRIVE = 2;

NET "gpio<22>" SLEW = FAST;
NET "gpio<22>" DRIVE = 12;
NET "gpio<23>" SLEW = FAST;
NET "gpio<23>" DRIVE = 12;
NET "gpio<24>" SLEW = FAST;
NET "gpio<24>" DRIVE = 12;
NET "gpio<25>" SLEW = FAST;
NET "gpio<25>" DRIVE = 12;

NET  "gpio2_d_out<*>" TIG;
NET  "gpio2_t_out<*>" TIG;
NET  "gpio2_in<*>" TIG;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for PS/2 Ports
#------------------------------------------------------------------------------

#Keyboard
NET ps2_keyb_clk  LOC = D2;
NET ps2_keyb_clk  SLEW = SLOW;
NET ps2_keyb_clk  DRIVE = 2;
NET ps2_keyb_clk  TIG;
NET ps2_keyb_data LOC = G9;
NET ps2_keyb_data SLEW = SLOW;
NET ps2_keyb_data DRIVE = 2;
NET ps2_keyb_data TIG;

#Mouse
NET ps2_mouse_clk  LOC = B14;
NET ps2_mouse_clk  SLEW = SLOW;
NET ps2_mouse_clk  DRIVE = 2;
NET ps2_mouse_clk  TIG;
NET ps2_mouse_data LOC = C14;
NET ps2_mouse_data SLEW = SLOW;
NET ps2_mouse_data DRIVE = 2;
NET ps2_mouse_data TIG;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for IIC Controller
#------------------------------------------------------------------------------

NET iic_scl    LOC = A17;
NET iic_sda    LOC = B17;
NET iic_scl    SLEW = SLOW;
NET iic_scl    DRIVE = 6;
NET iic_scl    TIG;
NET iic_sda    SLEW = SLOW;
NET iic_sda    DRIVE = 6;
NET iic_sda    TIG;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for AC97 Sound Controller
#------------------------------------------------------------------------------

NET ac97_bit_clk   LOC = AE10;
NET ac97_bit_clk   IOSTANDARD = LVCMOS33;
NET ac97_bit_clk   PERIOD = 80;
NET ac97_sdata_in  LOC = AD16;
NET ac97_sdata_in  IOSTANDARD = LVCMOS33;
NET ac97_reset_n   LOC = AD10;
NET ac97_reset_n   IOSTANDARD = LVCMOS33;
NET ac97_reset_n   TIG;
NET ac97_sdata_out LOC = C8;
NET ac97_sync      LOC = D9;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for System ACE MPU / USB
#------------------------------------------------------------------------------

NET sysace_clk_in   LOC        = AF11;
NET sysace_clk_in   IOSTANDARD = LVCMOS33;
NET sysace_clk_in   TNM_NET    = "sysace_clk_in";
# Leave 1 ns margin
TIMESPEC "TSSYSACE" = PERIOD "sysace_clk_in" 29 ns;

NET sace_usb_a<0>   LOC        = U22;
NET sace_usb_a<1>   LOC        = Y10;
NET sace_usb_a<2>   LOC        = AA10;
NET sace_usb_a<3>   LOC        = AC7;
NET sace_usb_a<4>   LOC        = Y7;
NET sace_usb_a<5>   LOC        = AA9;
NET sace_usb_a<6>   LOC        = Y9;
NET sace_usb_a<*>   IOSTANDARD = LVCMOS33;
NET sace_usb_a<*>   SLEW       = FAST;
NET sace_usb_a<*>   DRIVE      = 8;
NET sace_mpce       LOC        = AD5;
NET sace_mpce       IOSTANDARD = LVCMOS33;
NET sace_mpce       SLEW       = FAST;
NET sace_mpce       DRIVE      = 8;
NET sace_usb_d<0>   LOC        = AB7;
NET sace_usb_d<1>   LOC        = AC9;
NET sace_usb_d<2>   LOC        = AB9;
NET sace_usb_d<3>   LOC        = AE6;
NET sace_usb_d<4>   LOC        = AD6;
NET sace_usb_d<5>   LOC        = AF9;
NET sace_usb_d<6>   LOC        = AE9;
NET sace_usb_d<7>   LOC        = AD8;
NET sace_usb_d<8>   LOC        = AC8;
NET sace_usb_d<9>   LOC        = AF4;
NET sace_usb_d<10>  LOC        = AE4;
NET sace_usb_d<11>  LOC        = AD3;
NET sace_usb_d<12>  LOC        = AC3;
NET sace_usb_d<13>  LOC        = AF6;
NET sace_usb_d<14>  LOC        = AF5;
NET sace_usb_d<15>  LOC        = AA7;
NET sace_usb_d<*>   IOSTANDARD = LVCMOS33;
NET sace_usb_d<*>   SLEW       = FAST;
NET sace_usb_d<*>   DRIVE      = 8;
NET sace_usb_d<*>   PULLDOWN;
NET sace_usb_oen    LOC        = AA8;
NET sace_usb_oen    IOSTANDARD = LVCMOS33;
NET sace_usb_oen    SLEW       = FAST;
NET sace_usb_oen    DRIVE      = 8;
NET sace_usb_wen    LOC        = Y8;
NET sace_usb_wen    IOSTANDARD = LVCMOS33;
NET sace_usb_wen    SLEW       = FAST;
NET sace_usb_wen    DRIVE      = 8;
NET sysace_mpirq    LOC        = AD4;
NET sysace_mpirq    IOSTANDARD = LVCMOS33;
NET sysace_mpirq    TIG;
NET sysace_mpirq    PULLDOWN;

NET usb_csn         LOC        = AF10;
NET usb_csn         IOSTANDARD = LVCMOS33;
NET usb_csn         SLEW       = FAST;
NET usb_csn         DRIVE      = 8;
NET usb_hpi_reset_n LOC        = A7;
NET usb_hpi_reset_n IOSTANDARD = LVCMOS25;
NET usb_hpi_reset_n TIG;
NET usb_hpi_int     LOC        = V5;
NET usb_hpi_int     IOSTANDARD = LVCMOS33;
NET usb_hpi_int     TIG;
NET usb_hpi_int     PULLDOWN;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for DDR Controllers
#------------------------------------------------------------------------------

NET ddr_ad<0>  LOC = C26; # DDR_A0
NET ddr_ad<1>  LOC = E17; # DDR_A1
NET ddr_ad<2>  LOC = D18; # DDR_A2
NET ddr_ad<3>  LOC = C19; # DDR_A3
NET ddr_ad<4>  LOC = F17; # DDR_A4
NET ddr_ad<5>  LOC = B18; # DDR_A5
NET ddr_ad<6>  LOC = B20; # DDR_A6
NET ddr_ad<7>  LOC = C20; # DDR_A7
NET ddr_ad<8>  LOC = D20; # DDR_A8
NET ddr_ad<9>  LOC = C21; # DDR_A9
NET ddr_ad<10> LOC = A18; # DDR_A10
NET ddr_ad<11> LOC = B21; # DDR_A11
NET ddr_ad<12> LOC = A24; # DDR_A12
NET ddr_ba<0>  LOC = B12; # DDR_BA0
NET ddr_ba<1>  LOC = A16; # DDR_BA1
NET ddr_casb   LOC = F23; # DDR_CAS_N
NET ddr_cke    LOC = G22; # DDR_CKE
NET ddr_csb    LOC = G21; # DDR_CS_N
NET ddr_rasb   LOC = F24; # DDR_RAS_N
NET ddr_web    LOC = A23; # DDR_WE_N

NET ddr_clk    LOC = A10; # DDR_CK1_P
NET ddr_clk_fb LOC = B13; # DDR_CK1_P (FEEDBACK)
NET ddr_clkb   LOC = B10; # DDR_CK1_N

NET ddr_dm<0>  LOC = G19; # DDR_DM0
NET ddr_dm<1>  LOC = G24; # DDR_DM1
NET ddr_dm<2>  LOC = G20; # DDR_DM2
NET ddr_dm<3>  LOC = C22; # DDR_DM3

NET ddr_dqs<0> LOC = D25; # DDR_DQS0
NET ddr_dqs<1> LOC = G18; # DDR_DQS1
NET ddr_dqs<2> LOC = G17; # DDR_DQS2
NET ddr_dqs<3> LOC = D26; # DDR_DQS3

NET ddr_dq<0> LOC = H20; # DDR_D0
NET ddr_dq<1> LOC = E23; # DDR_D1
NET ddr_dq<2> LOC = H26; # DDR_D2
NET ddr_dq<3> LOC = H22; # DDR_D3
NET ddr_dq<4> LOC = E25; # DDR_D4
NET ddr_dq<5> LOC = E26; # DDR_D5
NET ddr_dq<6> LOC = F26; # DDR_D6
NET ddr_dq<7> LOC = E24; # DDR_D7
NET ddr_dq<8> LOC = E20; # DDR_D8
NET ddr_dq<9> LOC = A22; # DDR_D9
NET ddr_dq<10> LOC = C23; # DDR_D10
NET ddr_dq<11> LOC = C24; # DDR_D11
NET ddr_dq<12> LOC = A20; # DDR_D12
NET ddr_dq<13> LOC = A21; # DDR_D13
NET ddr_dq<14> LOC = D24; # DDR_D14
NET ddr_dq<15> LOC = E18; # DDR_D15
NET ddr_dq<16> LOC = F18; # DDR_D16
NET ddr_dq<17> LOC = A19; # DDR_D17
NET ddr_dq<18> LOC = F19; # DDR_D18
NET ddr_dq<19> LOC = B23; # DDR_D19
NET ddr_dq<20> LOC = E21; # DDR_D20
NET ddr_dq<21> LOC = D22; # DDR_D21
NET ddr_dq<22> LOC = D23; # DDR_D22
NET ddr_dq<23> LOC = B24; # DDR_D23
NET ddr_dq<24> LOC = E22; # DDR_D24
NET ddr_dq<25> LOC = F20; # DDR_D25
NET ddr_dq<26> LOC = H23; # DDR_D26
NET ddr_dq<27> LOC = G25; # DDR_D27
NET ddr_dq<28> LOC = G26; # DDR_D28
NET ddr_dq<29> LOC = H25; # DDR_D29
NET ddr_dq<30> LOC = H24; # DDR_D30
NET ddr_dq<31> LOC = H21; # DDR_D31

NET ddr_ad<*>  IOSTANDARD = SSTL2_I;
NET ddr_ba<*>  IOSTANDARD = SSTL2_I;
NET ddr_casb   IOSTANDARD = SSTL2_I;
NET ddr_cke    IOSTANDARD = SSTL2_I;
NET ddr_clk    IOSTANDARD = SSTL2_I;
NET ddr_clk_fb IOSTANDARD = LVCMOS25;
NET ddr_clkb   IOSTANDARD = SSTL2_I;
NET ddr_casb   IOSTANDARD = SSTL2_I;
NET ddr_csb    IOSTANDARD = SSTL2_I;
NET ddr_rasb   IOSTANDARD = SSTL2_I;
NET ddr_web    IOSTANDARD = SSTL2_I;

NET ddr_dqs<*> IOSTANDARD = SSTL2_II;
NET ddr_dm<*>  IOSTANDARD = SSTL2_II;
NET ddr_dq<*>  IOSTANDARD = SSTL2_II;

// Timing Constraint for DDR Feedback Clock
NET "ddr_clk_fb" TNM_NET = "ddr_clk_fb";
TIMESPEC "TSDDR_FB" = PERIOD "ddr_clk_fb" 9.9 ns;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for TFT VGA LCD Controller
#------------------------------------------------------------------------------

NET tft_lcd_b<0> LOC = L26; # VGA_B2
NET tft_lcd_b<0> IOSTANDARD = LVCMOS33;
NET tft_lcd_b<1> LOC = C5;  # VGA_B3
NET tft_lcd_b<2> LOC = C7;  # VGA_B4
NET tft_lcd_b<3> LOC = B7;  # VGA_B5
NET tft_lcd_b<4> LOC = G8;  # VGA_B6
NET tft_lcd_b<5> LOC = F8;  # VGA_B7
NET tft_lcd_b<*> SLEW = FAST;
NET tft_lcd_b<*> DRIVE = 8;

NET tft_lcd_clk  LOC = AF8;
NET tft_lcd_clk  IOSTANDARD = LVDCI_33;
NET tft_lcd_clk  SLEW = FAST;
NET tft_lcd_clk  DRIVE = 8;

NET tft_lcd_g<0> LOC = M20; # VGA_G2
NET tft_lcd_g<0> IOSTANDARD = LVCMOS33;
NET tft_lcd_g<1> LOC = E4;  # VGA_G3
NET tft_lcd_g<2> LOC = D3;  # VGA_G4
NET tft_lcd_g<3> LOC = H7;  # VGA_G5
NET tft_lcd_g<4> LOC = H8;  # VGA_G6
NET tft_lcd_g<5> LOC = C1;  # VGA_G7
NET tft_lcd_g<*> SLEW = FAST;
NET tft_lcd_g<*> DRIVE = 8;

NET tft_lcd_hsync LOC = C10;
NET tft_lcd_hsync SLEW = FAST;
NET tft_lcd_hsync DRIVE = 8;

NET tft_lcd_r<0> LOC = N25; #VGA_R2
NET tft_lcd_r<0> IOSTANDARD = LVCMOS33;
NET tft_lcd_r<1> LOC = C2; #VGA_R3
NET tft_lcd_r<2> LOC = G7; #VGA_R4
NET tft_lcd_r<3> LOC = F7; #VGA_R5
NET tft_lcd_r<4> LOC = E5; #VGA_R6
NET tft_lcd_r<5> LOC = E6; #VGA_R7
NET tft_lcd_r<*> SLEW = FAST;
NET tft_lcd_r<*> DRIVE = 8;

NET tft_lcd_vsync LOC = A8;
NET tft_lcd_vsync SLEW = FAST;
NET tft_lcd_vsync DRIVE = 8;

TIMESPEC "TSPLB_TFT" = FROM "sys_clk" TO "tft_clk" TIG;
TIMESPEC "TSTFT_PLB" = FROM "tft_clk" TO "sys_clk" TIG;

////////////////////////////////////////////////////////////////////////////
// Misc Board Signals
////////////////////////////////////////////////////////////////////////////

NET plb_error LOC = L24;
NET plb_error IOSTANDARD = LVCMOS33;
NET plb_error TIG;
NET opb_error LOC = V6;
NET opb_error IOSTANDARD = LVCMOS33;
NET opb_error TIG;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for Ethernet
#------------------------------------------------------------------------------

NET phy_col        LOC = E3;
NET phy_crs        LOC = D5;
NET phy_dv         LOC = A9;
NET phy_rx_clk     LOC = B15;
NET phy_rx_data<3> LOC = C4;
NET phy_rx_data<2> LOC = D4;
NET phy_rx_data<1> LOC = E1;
NET phy_rx_data<0> LOC = F1;

NET phy_rx_er      LOC = B9;
NET phy_tx_clk     LOC = C15;
NET phy_mii_clk    LOC = D1;
NET phy_mii_int_n  LOC = H4;
NET phy_rst_n      LOC = D10;
NET phy_tx_data<3> LOC = G1;
NET phy_tx_data<2> LOC = H3;
NET phy_tx_data<1> LOC = H2;
NET phy_tx_data<0> LOC = H1;
NET phy_tx_en      LOC = F4;
NET phy_tx_er      LOC = F3;
NET phy_mii_data   LOC = G4;

NET phy_mii_int_n  PULLUP;

NET phy_mii_int_n  TIG;
NET phy_rst_n      TIG;

# Timing Constraints (these are recommended in documentation and
# are unaltered except for the TIG)
NET "phy_rx_clk" TNM_NET = "RXCLK_GRP";
NET "phy_tx_clk" TNM_NET = "TXCLK_GRP";
TIMESPEC "TSTXOUT" = FROM "TXCLK_GRP" TO "PADS" 10 ns;
TIMESPEC "TSRXIN" = FROM "PADS" TO "RXCLK_GRP" 6 ns;

NET "phy_tx_clk" MAXSKEW= 1.0 ns;
NET "phy_rx_clk" MAXSKEW= 1.0 ns;
NET "phy_rx_clk" PERIOD = 40 ns HIGH 14 ns;
NET "phy_tx_clk" PERIOD = 40 ns HIGH 14 ns;

NET "phy_rx_data<3>" IOBDELAY=NONE;
NET "phy_rx_data<2>" IOBDELAY=NONE;
NET "phy_rx_data<1>" IOBDELAY=NONE;
NET "phy_rx_data<0>" IOBDELAY=NONE;
NET "phy_dv" IOBDELAY=NONE;
NET "phy_rx_er" IOBDELAY=NONE;
NET "phy_crs" IOBDELAY=NONE;
NET "phy_col" IOBDELAY=NONE;

# Timing ignores (to specify unconstrained paths)
TIMESPEC "TS_PHYTX_OPB" = FROM "TXCLK_GRP" TO "sys_clk" TIG;
TIMESPEC "TS_OPB_PHYTX" = FROM "sys_clk" TO "TXCLK_GRP" TIG;
TIMESPEC "TS_PHYRX_OPB" = FROM "RXCLK_GRP" TO "sys_clk" TIG;
TIMESPEC "TS_OPB_PHYRX" = FROM "sys_clk" TO "RXCLK_GRP" TIG;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for SRAM/FLASH
#------------------------------------------------------------------------------

NET sram_clk            LOC = AF7;
NET sram_clk_fb         LOC = AD17;
NET flash_a23           LOC = T21;
NET sram_flash_addr<22> LOC = U20;
NET sram_flash_addr<21> LOC = T19;
NET sram_flash_addr<20> LOC = AC5;
NET sram_flash_addr<19> LOC = AB5;
NET sram_flash_addr<18> LOC = AC4;
NET sram_flash_addr<17> LOC = AB4;

NET sram_flash_addr<16> LOC = AB3;
NET sram_flash_addr<15> LOC = AA4;
NET sram_flash_addr<14> LOC = AA3;
NET sram_flash_addr<13> LOC = W5;
NET sram_flash_addr<12> LOC = W6;
NET sram_flash_addr<11> LOC = W3;
NET sram_flash_addr<10> LOC = AF3;
NET sram_flash_addr<9>  LOC = AE3;
NET sram_flash_addr<8>  LOC = AD2;
NET sram_flash_addr<7>  LOC = AD1;
NET sram_flash_addr<6>  LOC = AC2;
NET sram_flash_addr<5>  LOC = AC1;
NET sram_flash_addr<4>  LOC = AB2;
NET sram_flash_addr<3>  LOC = AB1;
NET sram_flash_addr<2>  LOC = AA1;
NET sram_flash_addr<1>  LOC = Y2;
NET sram_flash_addr<0>  LOC = Y1;
NET sram_flash_data<31> LOC = F14;
NET sram_flash_data<30> LOC = F13;
NET sram_flash_data<29> LOC = F12;
NET sram_flash_data<28> LOC = F11;
NET sram_flash_data<27> LOC = F16;
NET sram_flash_data<26> LOC = F15;
NET sram_flash_data<25> LOC = D14;
NET sram_flash_data<24> LOC = D13;
NET sram_flash_data<23> LOC = D15;
NET sram_flash_data<22> LOC = E14;
NET sram_flash_data<21> LOC = C11;
NET sram_flash_data<20> LOC = D11;
NET sram_flash_data<19> LOC = D16;
NET sram_flash_data<18> LOC = C16;
NET sram_flash_data<17> LOC = E13;
NET sram_flash_data<16> LOC = D12;
NET sram_flash_data<15> LOC = AA14;
NET sram_flash_data<14> LOC = AB14;
NET sram_flash_data<13> LOC = AC12;
NET sram_flash_data<12> LOC = AC11;
NET sram_flash_data<11> LOC = AA16;
NET sram_flash_data<10> LOC = AA15;
NET sram_flash_data<9>  LOC = AB13;
NET sram_flash_data<8>  LOC = AA13;
NET sram_flash_data<7>  LOC = AC14;
NET sram_flash_data<6>  LOC = AD14;
NET sram_flash_data<5>  LOC = AA12;
NET sram_flash_data<4>  LOC = AA11;
NET sram_flash_data<3>  LOC = AC16;
NET sram_flash_data<2>  LOC = AC15;
NET sram_flash_data<1>  LOC = AC13;
NET sram_flash_data<0>  LOC = AD13;
NET sram_cen            LOC = V7;
NET sram_flash_oe_n     LOC = AC6;
NET sram_flash_we_n     LOC = AB6;
NET sram_bw<3>          LOC = Y3; #Y4; 
NET sram_bw<2>          LOC = Y4; #Y3;
NET sram_bw<1>          LOC = Y5; #Y6;
NET sram_bw<0>          LOC = Y6; #Y5;
NET flash_ce            LOC = W7;
NET sram_adv_ld_n       LOC = W4;
NET sram_mode           LOC = V26;

NET sram_clk           IOSTANDARD = LVCMOS33;
NET sram_clk           DRIVE = 16;
NET sram_clk           SLEW = FAST;
NET sram_clk_fb        IOSTANDARD = LVCMOS33;

NET flash_a23          IOSTANDARD = LVDCI_33;
NET flash_a23  SLEW = FAST;
NET flash_a23  DRIVE = 8;

NET sram_mode          IOSTANDARD = LVDCI_33;
NET sram_mode SLEW = FAST;
NET sram_mode DRIVE = 8;

NET sram_flash_addr<*> IOSTANDARD = LVDCI_33;
NET sram_flash_addr<*>  SLEW = FAST;
NET sram_flash_addr<*>  DRIVE = 8;

NET sram_flash_data<*> IOSTANDARD = LVCMOS33;
NET sram_flash_data<*> DRIVE = 12;
NET sram_flash_data<*> SLEW = FAST;
NET sram_flash_data<*> PULLDOWN;

NET sram_flash_oe_n    IOSTANDARD = LVDCI_33;
NET sram_flash_oe_n SLEW = FAST;
NET sram_flash_oe_n DRIVE = 8;

NET sram_flash_we_n    IOSTANDARD = LVDCI_33;
NET sram_flash_we_n SLEW = FAST;
NET sram_flash_we_n DRIVE = 8;

NET sram_bw<*>         IOSTANDARD = LVDCI_33;
NET sram_bw<*> SLEW = FAST;
NET sram_bw<*> DRIVE = 8;

NET flash_ce           IOSTANDARD = LVDCI_33;
NET flash_ce SLEW = FAST;
NET flash_ce DRIVE = 8;

NET sram_cen           IOSTANDARD = LVDCI_33;
NET sram_cen SLEW = FAST;
NET sram_cen DRIVE = 8;

NET sram_adv_ld_n      IOSTANDARD = LVDCI_33;
NET sram_adv_ld_n SLEW = FAST;
NET sram_adv_ld_n DRIVE = 8;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for Expansion Header GPIO
#------------------------------------------------------------------------------

NET gpio_exp_hdr1<31> LOC = AF24; # HDR1_64
NET gpio_exp_hdr1<30> LOC = AE24; # HDR1_62
NET gpio_exp_hdr1<29> LOC = AD22; # HDR1_8
NET gpio_exp_hdr1<28> LOC = AB21; # HDR1_58
NET gpio_exp_hdr1<27> LOC = W20;  # HDR1_44
NET gpio_exp_hdr1<26> LOC = W21;  # HDR1_48
NET gpio_exp_hdr1<25> LOC = AB22; # HDR1_14
NET gpio_exp_hdr1<24> LOC = AD25; # HDR1_20
NET gpio_exp_hdr1<23> LOC = W22;  # HDR1_46
NET gpio_exp_hdr1<22> LOC = V21;  # HDR1_56
NET gpio_exp_hdr1<21> LOC = V22;  # HDR1_54
NET gpio_exp_hdr1<20> LOC = AC22; # HDR1_16
NET gpio_exp_hdr1<19> LOC = AD26; # HDR1_18
NET gpio_exp_hdr1<18> LOC = AC26; # HDR1_34
NET gpio_exp_hdr1<17> LOC = AD23; # HDR1_6
NET gpio_exp_hdr1<16> LOC = AB25; # HDR1_30
NET gpio_exp_hdr1<15> LOC = AC23; # HDR1_4
NET gpio_exp_hdr1<14> LOC = AB26; # HDR1_24
NET gpio_exp_hdr1<13> LOC = AC21; # HDR1_60
NET gpio_exp_hdr1<12> LOC = AA23; # HDR1_10
NET gpio_exp_hdr1<11> LOC = AA26; # HDR1_22
NET gpio_exp_hdr1<10> LOC = Y25;  # HDR1_40
NET gpio_exp_hdr1<9>  LOC = Y26;  # HDR1_38
NET gpio_exp_hdr1<8>  LOC = W26;  # HDR1_50
NET gpio_exp_hdr1<7>  LOC = AB23; # HDR1_12
NET gpio_exp_hdr1<6>  LOC = Y24;  # HDR1_26
NET gpio_exp_hdr1<5>  LOC = AB24; # HDR1_32
NET gpio_exp_hdr1<4>  LOC = W25;  # HDR1_52
NET gpio_exp_hdr1<3>  LOC = AC24; # HDR1_2
NET gpio_exp_hdr1<2>  LOC = AC25; # HDR1_36
NET gpio_exp_hdr1<1>  LOC = V20;  # HDR1_42
NET gpio_exp_hdr1<0>  LOC = AA24; # HDR1_28
NET gpio_exp_hdr1<*> TIG;
NET gpio_exp_hdr1<*> PULLDOWN;

NET gpio_exp_hdr2<31> LOC = AF18; # HDR2_40
NET gpio_exp_hdr2<30> LOC = AE18; # HDR2_38
NET gpio_exp_hdr2<29> LOC = AF19; # HDR2_32
NET gpio_exp_hdr2<28> LOC = AF20; # HDR2_30
NET gpio_exp_hdr2<27> LOC = AF21; # HDR2_44
NET gpio_exp_hdr2<26> LOC = AF22; # HDR2_42
NET gpio_exp_hdr2<25> LOC = AF23; # HDR2_24
NET gpio_exp_hdr2<24> LOC = AE23; # HDR2_22
NET gpio_exp_hdr2<23> LOC = AC18; # HDR2_48
NET gpio_exp_hdr2<22> LOC = AB18; # HDR2_46
NET gpio_exp_hdr2<21> LOC = AD19; # HDR2_64
NET gpio_exp_hdr2<20> LOC = AC19; # HDR2_62
NET gpio_exp_hdr2<19> LOC = AE20; # HDR2_16
NET gpio_exp_hdr2<18> LOC = AD20; # HDR2_14
NET gpio_exp_hdr2<17> LOC = AE21; # HDR2_36
NET gpio_exp_hdr2<16> LOC = AD21; # HDR2_34
NET gpio_exp_hdr2<15> LOC = AB20; # HDR2_52
NET gpio_exp_hdr2<14> LOC = AC20; # HDR2_50
NET gpio_exp_hdr2<13> LOC = Y17;  # HDR2_56
NET gpio_exp_hdr2<12> LOC = AA17; # HDR2_54
NET gpio_exp_hdr2<11> LOC = AA19; # HDR2_60
NET gpio_exp_hdr2<10> LOC = AA20; # HDR2_58
NET gpio_exp_hdr2<9>  LOC = Y22;  # HDR2_8
NET gpio_exp_hdr2<8>  LOC = Y23;  # HDR2_6
NET gpio_exp_hdr2<7>  LOC = W23;  # HDR2_12
NET gpio_exp_hdr2<6>  LOC = W24;  # HDR2_10
NET gpio_exp_hdr2<5>  LOC = Y20;  # HDR2_20
NET gpio_exp_hdr2<4>  LOC = Y21;  # HDR2_18
NET gpio_exp_hdr2<3>  LOC = Y19;  # HDR2_28
NET gpio_exp_hdr2<2>  LOC = W19;  # HDR2_26
NET gpio_exp_hdr2<1>  LOC = AA18; # HDR2_4
NET gpio_exp_hdr2<0>  LOC = Y18;  # HDR2_2
NET gpio_exp_hdr2<*> TIG;
NET gpio_exp_hdr2<*> PULLDOWN;

#------------------------------------------------------------------------------
# IO Pad Location Constraints / Properties for Character LCD GPIO
#------------------------------------------------------------------------------

NET gpio_char_lcd<6> LOC = AE13; # LCD_E
NET gpio_char_lcd<5> LOC = AC17; # LCD_RS
NET gpio_char_lcd<4> LOC = AB17; # LCD_RW
NET gpio_char_lcd<3> LOC = AF12; # LCD_DB7
NET gpio_char_lcd<2> LOC = AE12; # LCD_DB6
NET gpio_char_lcd<1> LOC = AC10; # LCD_DB5
NET gpio_char_lcd<0> LOC = AB10; # LCD_DB4
NET gpio_char_lcd<*> IOSTANDARD = LVCMOS33;
NET gpio_char_lcd<*> TIG;
NET gpio_char_lcd<*> PULLDOWN;