Latching in IOE or LE?
The DFF in the IOE can be configured to either latch incoming data or outgoing data
- Can latch ingoing/outgoing data in either IOE or LE (logic element)
Using the DFF in the IOE to latch outgoing data will usually reduce Clock-2-Out time
- DFF is closer to the Pin!
Using the DFF in the IOE to latch ingoing data will reduce external setup time.
- DFF is closer to the Pin!