184.108.40.206. Clock Sectors
Each clock sector has a dedicated sector clock (SCLK) network and a row clock network that can be accessed by the programmable clock routing. On each side of the clock sector, there is a channel that contains 64 unidirectional wires in bidirectional pairs, where only one wire in each pair can be used at one time. At each corner, there is a set of programmable clock switch multiplexers that can route between these clock wires.
A signal on a vertical clock wire can enter the sector to its left or right via clock tap multiplexers. The clock tap multiplexer drives a sector clock, which distributes the signal to each row in the clock sector. In each row, there are six row clock resources that route to all core functional blocks, PLLs, and I/O interfaces in the sector, and to adjacent transceivers.
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