Connections And Peripherals Of The Cyc1000 Board; Board Status Elements; Clock Circuitry; Figure 3 - Position Of Indication Leds - Arrow CYC1000 User Manual

Connections and Peripherals of the CYC1000 Board

3.1 Board Status Elements

In addition to the 8 LEDs that the FPGA can control, there are 2 additional LEDs which can indicate
the status of the board.
Board Reference
D1 3.3V
D10 CONF_DONE

3.2 Clock Circuitry

All the external clocks of the system can be seen in Figure 4. The default clock (CLK12M) is at
12MHz and is connected and driving the FPGA's user logic and the Arrow USB Programmer2.
There is an optional slot of another clock (CLK_X) to add another preferred clock source to the
FPGA. Both clocks are driving the internal PLLs.
For more information on clocks and PLLs of the Cyclone 10 LP, please refer to this document.
CYC1000 User Guide
Figure 3 – Position of Indication LEDs
LED Name
On when 3.3V power is active
On when configuration data was loaded to Cyclone 10 LP
device without error
Figure 4 – CYC1000 Clock Tree
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Description
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January 2020