Cyclone® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683375
Date 10/18/2023
Document Table of Contents

6.4.9. I/O and DQS Configuration Blocks

The I/O and DQS configuration blocks are shift registers that you can use to dynamically change the settings of various device configuration bits.

  • The shift registers power-up low.
  • Every I/O pin contains one I/O configuration register.
  • Every DQS pin contains one DQS configuration block in addition to the I/O configuration register.
Figure 139. Configuration Block (I/O and DQS)This figure shows the I/O configuration block and the DQS configuration block circuitry.