Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook

ID 683775
Date 7/08/2024
Public
Document Table of Contents

5.5.1. I/O Element Structure in Cyclone® 10 GX Devices

The I/O elements (IOEs) in Cyclone® 10 GX devices contain a bidirectional I/O buffer and I/O registers to support a complete embedded bidirectional single data rate (SDR) or double data rate (DDR) transfer.

The IOEs are located in I/O columns within the core fabric of the Cyclone® 10 GX device.

The GPIO IOE register consists of the DDR register, the half rate register, and the transmitter delay chains for input, output, and output enable (OE) paths:

  • You can take data from the combinatorial path or the registered path.
  • Only the core clock clocks the data.
  • The half rate clock routed from the core clocks the half rate register.
  • The full rate clock from the core clocks the full rate register.