SCPS286 July 2025 TPLD2001
ADVANCE INFORMATION
In addition to the discrete LUT, DFF/latch, or counters described previously, the configurable logic and timing blocks can be configured in two other modes:
Mode 1: LUT/DFF into counter. The three inputs from the connection mux go into the LUT/DFF/LAT and the output of the first stage feed into the input of the counter. The output of the counter goes back into the connection mux.
Mode 2: Counter into LUT/DFF. One input from the connection mux goes to the counter input and the output feeds into any one input of the LUT or the DFF/LAT. The output of the second stage goes back into the connection mux.
This feature enables more LUTs, DFFs/latches, and counters to be used in a design. However, within a single block, only the LUT or only the DFF/latch may be used. Further, in these modes, the external clock source from the connection mux for the counter is disabled, thus, only a frequency derived from the internal oscillator can be used.