IODELAY_GROUP |
|
---|---|
Applied To |
IDELAY and IDELAYCTRL cells |
Constraint Values |
String |
UCF Example |
INST idelay0 IODELAY_GROUP = group0; |
XDC Example |
set_property IODELAY_GROUP group0 [get_cells idelay0] |
DCI_VALUE |
|
---|---|
Applied To |
I/O buffer cells |
Constraint Values |
Integer. Resistance in Ohms |
UCF Example |
INST a_IBUF[0]_inst DCI_VALUE = 75; |
XDC Example |
set_property DCI_VALUE 75 [get_cells {a_IBUF[0]_inst}] |
DIFF_TERM |
|
---|---|
Applied To |
I/O buffer cells |
Constraint Values |
Boolean |
UCF Example |
INST a_IBUF[0]_inst DIFF_TERM = TRUE; |
XDC Example |
set_property DIFF_TERM true [get_cells {a_IBUF[0]_inst}] |
DRIVE |
|
---|---|
Applied To |
Inout and output buffer cells |
Constraint Values |
Integer: 2, 4, 6, 8, 12, 16, 24 |
UCF Example |
INST q_OBUF[0]_inst DRIVE = 24; |
XDC Example |
set_property DRIVE 24 [get_ports q[0]] LVTTL allows a value of 24. |
IOSTANDARD |
|
---|---|
Applied To |
I/O buffer cells |
Constraint Values |
I/O standard string |
UCF Example |
INST q_OBUF[0]_inst IOSTANDARD = LVCMOS25; |
XDC Example |
set_property IOSTANDARD LVCMOS25 [get_ports q[0]] For more information, see the Constraints Guide (UG625) [Ref 11] . |
SLEW |
|
---|---|
Applied To |
Inout and output buffer cells |
Constraint Values |
SLOW or FAST |
UCF Example |
INST q_OBUF[0]_inst SLEW = FAST; |
XDC Example |
set_property SLEW FAST [get_ports q[0]] |
FAST |
|
---|---|
Applied To |
Inout and output buffer cells |
Constraint Values |
N/A |
UCF Example |
INST q_OBUF[0]_inst FAST; |
XDC Example |
set_property SLEW FAST [get_ports q[0]] |
SLOW |
|
---|---|
Applied To |
Inout and output buffer cells |
Constraint Values |
N/A |
UCF Example |
INST q_OBUF[0]_inst SLOW; |
XDC Example |
set_property SLEW SLOW [get_ports q[0]] |