Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook
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Visible to Intel only — GUID: sam1403482065541
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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.