The following table 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 |
0–1100 (TIME) |
0 | Decimal |
TIME mode: Desired value in ps. Spartan UltraScale+ devices support up to 1.1 ns. COUNT mode: Desired value in taps. For more information, see DELAY_VALUE Attribute. |
| REFCLK_FREQUENCY |
300.00–800.00 (IDELAYCTRL) 300.00–2666.67 (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_PLUS | ULTRASCALE | String | Sets the device version (ULTRASCALE_PLUS) |
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