PoC.misc.sync.Bits
This module synchronizes multiple flag bits into clock-domain Clock.
The clock-domain boundary crossing is done by two synchronizer D-FFs. All
bits are independent from each other. If a known vendor like Altera or Xilinx
are recognized, a vendor specific implementation is chosen.
Attention
Use this synchronizer only for long time stable signals (flags).
- Constraints:
- General:
Please add constraints for meta stability to all ‘_meta’ signals and timing ignore constraints to all ‘_async’ signals.
- Xilinx:
In case of a Xilinx device, this module will instantiate the optimized module PoC.xil.sync.Bits. Please attend to the notes of sync_Bits.vhdl.
- Altera sdc file:
TODO
Entity Declaration:
See also
- PoC.misc.sync.Reset
For a special 2 D-FF synchronizer for reset-signals.
- PoC.misc.sync.Pulse
For a special 1+2 D-FF synchronizer for pulse-signals.
- PoC.misc.sync.Strobe
For a synchronizer for strobe-signals.
- PoC.misc.sync.Vector
For a multiple bits capable synchronizer.