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3.4. SCC register descriptions

The Daughterboard Configuration Controller writes to the SCC registers at powerup with the values that the configuration board file defines. The Daughterboard Configuration Controller also reads the LOCK and ID registers to determine whether the PLLs in the FPGA are locked, and to determine the FPGA image that has been loaded. During run-time, the Daughterboard Configuration Controller polls the LED and switch values to ensure that they match the SCC register values. The SCC registers are also available during run-time from the motherboard SYG_CFG register interface.

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