KEEP_HIERARCHY
Applied To
Cells
Constraint Values
• TRUE
• FALSE
• YES
• NO
UCF Example
INST u1 KEEP_HIERARCHY = TRUE;
XDC Example
set_property DONT_TOUCH true [get_cells u1]
IOB
Applied To
Cells
Constraint Values
IOB_XnYn
UCF Example
INST ib[0] LOC = IOB_X0Y341;
XDC Example
set_property LOC IOB_X0Y341 [get_cells ib[0]]
IN_FIFO
Applied To
Cells
Constraint Values
IN_FIFO_XnYn
UCF Example
INST infifo_inst LOC = IN_FIFO_X0Y24;
XDC Example
set_property LOC IN_FIFO_X0Y24 [get_cells
infifo_inst]
OUT_FIFO
Applied To
Cells
Constraint Values
OUT_FIFO_XnYn
UCF Example
INST outfifo_inst LOC = OUT_FIFO_X0Y24;
XDC Example
set_property LOC OUT_FIFO_X0Y24 [get_cells
outfifo_inst]
ILOGIC
Applied To
Cells
Constraint Values
ILOGIC_XnYn
UCF Example
INST ireg LOC = ILOGIC_X0Y76;
XDC Example
set_property LOC ILOGIC_X0Y76 [get_cells ireg]
OLOGIC
Applied To
Cells
Constraint Values
OLOGIC_XnYn
UCF Example
INST oreg LOC = OLOGIC_X0Y76
XDC Example
set_property LOC OLOGIC_X0Y76 [get_cells oreg]
IDELAY
Applied To
Cells
Constraint Values
IDELAY_XnYn
UCF Example
INST idelay0 LOC = IDELAY_X0Y21;
XDC Example
set_property LOC IDELAY_X0Y21 [get_cells
idelay0]
IDELAYCTRL
Applied To
Cells
Constraint Values
IDELAYCTRL_XnYn
UCF Example
INST idelayctrl0 LOC = IDELAYCTRL_X0Y0;
XDC Example
set_property LOC IDELAYCTRL_X0Y0 [get_cells
idelayctrl0]
BEL
A5LUT, B5LUT, C5LUT, D5LUT
Applied To
Cells
Constraint Values
A5LUT, B5LUT, C5LUT, D5LUT
UCF Example
INST a0 BEL = A5LUT;
XDC Example
set_property BEL A5LUT [get_cells a0]
A6LUT, B6LUT, C6LUT, D6LUT
Applied To
Cells
Constraint Values
A6LUT, B6LUT, C6LUT, D6LUT
UCF Example
INST a0 BEL = D6LUT;
XDC Example
set_property BEL D6LUT [get_cells a0]
AFF, BFF, CFF, DFF
Applied To
Cells
Constraint Values
AFF, BFF, CFF, DFF
UCF Example
INST a_reg[0] BEL = CFF;
XDC Example
set_property BEL CFF [get_cells a_reg[0]]
A5FF, B5FF, C5FF, D5FF
Applied To
Cells
Constraint Values
A5FF, B5FF, C5FF, D5FF
UCF Example
INST a_reg[0] BEL = B5FF;
XDC Example
set_property BEL B5FF [get_cells a_reg[0]]
F7AMUX, F7BMUX
Applied To
Cells
Constraint Values
F7AMUX, F7BMUX
UCF Example
INST m0 BEL = F7BMUX;
XDC Example
set_property BEL F7BMUX [get_cells m0]
IOB
TRUE
Applied To
FF cells
Constraint Values
TRUE
UCF Example
INST a1_reg[*] IOB = TRUE;
XDC Example
set_property IOB TRUE [get_ports
DataOut_pad[*]]
TIP: XDC example 1, above, puts the property on the port itself and causes the flop that drives the IO
buffer to be placed inside the pad.
FALSE
Applied To
FF cells
Constraint Values
FALSE
UCF Example
INST b1_reg[*] IOB = FORCE;
XDC Example
set_property IOB TRUE [get_cells a1_reg[*]]
FORCE
Applied To
FF cells
Constraint Values
FORCE
UCF Example
INST q_reg[*] IOB = FALSE;
XDC Example
set_property IOB TRUE [get_cells q_reg[*]]
Note : The Vivado Design Suite does not support this
constraint in XDC. Use TRUE instead.
H_SET
Applied To
Cells
Constraint Values
Tool-generated string
UCF Example
N/A
XDC Example
N/A
Note : For more information, see Relative Location (RLOC) in
the Constraints Guide (UG625). In the Vivado Design Suite,
H_SET cells have a property called RPM.
U_SET
Applied To
Cells
Constraint Values
String
UCF Example
INST u0 U_SET = h0; (usually set in UCF)
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
U_SET must be placed in HDL code as an attribute.
For more information, see Relative Location (RLOC) in the
Constraints Guide (UG625).
RLOC
Applied To
Cells
Constraint Values
XnYn
UCF Example
INST u0 RLOC = X2Y1;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
RLOC must be placed in HDL code as an attribute.
For more information, see Relative Location (RLOC) in the
Constraints Guide (UG625).
RLOC_ORIGIN
Applied To
Cells
Constraint Values
XnYn
UCF Example
INST u0 RLOC_ORIGIN = X144Y255;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
RLOC_ORIGIN must be placed in HDL code as an attribute.
For more information, see Relative Location (RLOC) in the
Constraints Guide (UG625).
RPM_GRID
Applied To
Cells
Constraint Values
GRID
UCF Example
INST u0 RPM_GRID = GRID;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
RPM_GRID must be placed in HDL code as an attribute.
For more information, see Relative Location (RLOC) in the
Constraints Guide (UG625).
USE_RLOC
Applied To
Cells
Constraint Values
TRUE, FALSE
UCF Example
INST u0 USE_RLOC = FALSE;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
RLOC_RANGE
Applied To
Cells
Constraint Values
XnYn:XnYn
UCF Example
INST u0 RLOC_RANGE = X1Y1:X3Y3;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
Create a Pblock with the desired range, and add the RPM
cells to the Pblock .
BLKNM
Applied To
Cells
Constraint Values
String
UCF Example
INST u0 BLKNM = blk0;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
HBLKNM
Applied To
Cells, Nets
Constraint Values
String
UCF Example
INST u0 HBLKNM = blk0;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
XBLKNM
Applied To
Cells, Nets
Constraint Values
String
UCF Example
INST u0 XBLKNM = blk0;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
Use BEL PROHIBIT to keep out unrelated logic.
HLUTNM
Applied To
LUT cells
Constraint Values
String
UCF Example
UCF is not allowed, only HDL.
XDC Example
set_property HLUTNM h0 [get_cells {LUT0 LUT1}]
LUTNM
Applied To
LUT cells
Constraint Values
String
UCF Example
UCF is not allowed, only HDL.
XDC Example
set_property LUTNM h0 [get_cells {LUT0 LUT1}]
USE_LUTNM
Applied To
LUT cells
Constraint Values
TRUE, FALSE
UCF Example
INST lut0 USE_LUTNM = FALSE;
XDC Example
The Vivado Design Suite does not support this constraint in
XDC.
