When operating the CLB TILE at
frequencies higher than 100MHz, the Pipeline mode MUST be enabled. When CLB Pipeline
mode is enabled, the operations of the HLC and COUNTER modules are changed.
- When operating at higher
frequencies that require Pipeline mode to be enabled, the pipelined versions
of the the CLB CELL OUTPUTs are brought into the HLC. The Pipeline mode
causes the CELL outputs delayed by 1 clock cycle to be used as the source of
the HLC event triggers.
- In Pipeline mode, the COUNTER
module's add/sub/shift operations, which are triggered by an event, use the
value of the counter in the previous clock cycle (pipelined).
To enable the CLB Pipeline mode, set the CLB_LOAD_EN.PIPELINE_EN.