Shift Register Summary - UG474

7 Series FPGAs Configurable Logic Block User Guide (UG474)

Document ID
UG474
Release Date
2025-04-01
Revision
1.9 English

Here is a summary of the shift registers:

  • A shift operation requires one clock edge
  • Dynamic-length read operations to the Q output of the LUT are asynchronous
  • Static-length read operations to the Q output of the LUT are synchronous
  • The data input has a setup-to-clock timing specification
  • In a cascadable configuration, the Q31 output always contains the last bit value
  • The Q31 output changes synchronously after each shift operation