Cyclone 10 LP RefKit User Guide
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February 2022
Connections and Peripherals of the Cyclone 10 LP
RefKit Board
3.1
Board Status Elements
In addition to the 13 user LEDs that the FPGA can control, there are 2 additional board-specific
status LEDs that can indicate the status of the board.
Board Reference
LED Name
Description
D1
3.3V
On when 3.3V power is active
D10
CONF_DONE
On when configuration data was loaded to Cyclone 10 LP
device without error
3.2
Clock Circuitry
All the external clocks of the system can be seen in Figure 5. There are two default clocks which
are 12MHz and 25MHz. Both clock signals are connected and driving the FPGA
’
s user logic and
other interfaces (Arrow USB Programmer2 and Ethernet). There are optional slots for other clocks
that you can either add another preferred clock source to the FPGA (CLK_IN_SMA) or generate an
FPGA-controlled clock (CLK_OUT_SMA). All clock signals are connected to the internal PLLs of the
FPGA.
For more information on clocks and PLLs of the Cyclone 10 LP, please refer to this
er In icat r LED
C D E LED
Figure 4
–
Position of Indication LEDs
