Table: ODELAYE3 Attributes lists the ODELAYE3 attributes.
Attribute |
Values |
Default |
Type |
Description |
---|---|---|---|---|
CASCADE |
NONE MASTER SLAVE_MIDDLE SLAVE_END |
NONE |
String |
For more information, see CASCADE Attribute . |
DELAY_TYPE |
FIXED VAR_LOAD VARIABLE |
FIXED |
String |
The DELAY_TYPE attribute sets the type of delay used, it can be FIXED, VARIABLE, or VAR_LOAD. See the DELAY_TYPE Attribute for further information. |
DELAY_VALUE |
0–1250 (TIME UltraScale) 0–1100 (TIME UltraScale+) |
0 |
Decimal |
TIME mode: Desired value in ps. UltraScale devices support delays up to 1.25 ns. UltraScale+ devices support up to 1.1 ns. COUNT mode: Desired value in taps. For more information, see DELAY_VALUE Attribute . |
REFCLK_FREQUENCY |
200.00–800.00
300.00–800.00 (UltraScale+ IDELAYCTRL) 200.00–2400.00 (UltraScale BITSLICE_CONTROL) 300.00–2666.67 (UltraScale+ BITSLICE_CONTROL) |
300.0 |
1 significant digit float |
The REFCLK_FREQUENCY attribute specifies the reference clock of the IDELAYCTRL frequency in MHz. This attribute must mimic the clock frequency applied at the IDELAYCTRL component except when DELAY_FORMAT is set to COUNT, in which case the attribute can be left at the default value. |
DELAY_FORMAT |
TIME (1) COUNT |
TIME |
String |
When set to TIME, the delay equals the value given in DELAY_VALUE, specified in ps, and is calibrated by the IDELAYCTRL primitive using the REFCLK port input. The IDELAYCTRL.REFCLK must be reflected in the ODELAY attribute REFCLK_FREQUENCY. When set to COUNT, the initial tap setting goes to whatever number of taps is specified in DELAY_VALUE. This does not give a constant delay because the tap delays vary with PVT. The number of taps in the delay line is important in COUNT mode. For more information, see DELAY_FORMAT Attribute . |
UPDATE_MODE |
ASYNC SYNC MANUAL |
ASYNC |
String |
For more information, see UPDATE_MODE Attribute . |
SIM_DEVICE |
ULTRASCALE, ULTRASCALE_PLUS, ULTRASCALE_PLUS_ES1, ULTRASCALE_PLUS_ES2 |
ULTRASCALE |
String |
Sets the device version (ULTRASCALE, ULTRASCALE_PLUS, ULTRASCALE_PLUS_ES1, ULTRASCALE_PLUS_ES2) |
Notes: 1. When in TIME mode, calibration affects the availability of bit slices within the nibble. See Bank Overview for more information. |