=== Clock Selection ===
The clock routing is selected using jumper J3. This allows the following use cases:
Routing crystal oscillator (X1) to victim CLKIN.
Routing crystal oscillator (X1) to ChipWhisperer HS-IN, then routing HS-OUT to victim CLKIN (for glitch insertion).
Routing CLKFB from victim to ChipWhisperer HS-IN.
[[File:cw308_clockrouting.png|400px]]