21
R1 (GPIO174PB4/CLKIN_W_7/CCC_NW_CLKIN_W_7/CCC_NW_PLL0_OUT0)
J3 (GPIO215PB4/CLKIN_W_5/CCC_NW_CLKIN_W_5)
The following figure shows the 50-MHz clock oscillator interface
Figure 15 - 50-MHz Clock Oscillator
4.10
User Interface
The Avalanche Board has user LEDs and push-button switches.
4.10.1
User LEDs
The Avalanche Board has two dual-color active-high LEDs that are connected to the PolarFire
device. The following table lists the on-board user LEDs.
Avalanche Board
Reference
PolarFire FPGA
Pin Number
Bank
LED 4 (Green)
D6
Bank 2
LED 4 (Red)
D7
Bank 2
LED 5 (Green)
D8
Bank 2
LED 5 (Red)
D9
Bank 2
Table 5 - User LEDs
4.10.2
Push-Button Switches
The Avalanche Board comes with three active-low push-button tactile switches that are
connected to the PolarFire device. The following table lists the on-board push-button
switches.
Avalanche
Board
Reference
PolarFire FPGA
Pin Number
Description
Bank
SW1
E13
User Button 1
Bank 2
SW2
E14
User Button 2
Bank 2
SW3
F5
User Reset
1
Bank 2
Table 6 - Push-Button Switches
1
Upon depression of the User Reset switch (SW3), LED 11 becomes active.
PolarFire FPGA
R1
J3
2.5 V
50 MHz
Oscillator
PHY
VSC8531
