IDDRE1 Ports - IDDRE1 Ports - UG861

Spartan UltraScale+ FPGAs SelectIO Resources User Guide (UG861)

Document_ID
UG861
Release_Date
2026-04-28
Revision
1.1 English
Note: IDDRE1 components used in a design are translated and implemented by the Vivado design tools as ISERDESE3 components.

The following table lists the IDDRE1 ports.

Table 1. IDDRE1 Ports
Port I/O Description
Q1, Q2 Output IDDRE1 register outputs
C Input Clock input pin
CB Input Inverted clock input pin when IS_C_INVERTED = 0 and IS_CB_INVERTED = 0
D Input Register input from IOB
R Input Asynchronous reset, release synchronous to C/CB