Device Overview

Top View

A-E - Five status LEDs managed by the debug microcontroller.
- A - Power Indicator.
- B - FPGA is online.
- C - FPGA has requested control of the CONTROL port.
- D - FPGA has control of the CONTROL port.
- E - Reserved for future use.
0-5 - Six user LEDs managed by the FPGA.

PROGRAM - Press this button to return control of the CONTROL port to the debug microcontroller and hold the FPGA in an unconfigured state.
- Recovery mode: Press this button during power-on to invoke the Saturn-V bootloader on the CONTROL port.
CONTROL - Primary USB connector used by the host computer to control Cynthion.
USER - A user-assignable button that can be used in your own designs.
AUX - An auxiliary USB connection that can be used in your own designs.

TARGET C - USB Type-C connector for Packetry traffic capture and Facedancer device emulation.
TARGET A - USB Type-A connector shared with the TARGET C connector.
RESET - Press this button to reset Cynthion’s debug microcontroller and reconfigure the FPGA from flash.

A & B - Two Digilent Pmod™ Compatible I/O connectors for a total of 16 high-speed FPGA user IOs.
- B can also be configured to act as a serial port and JTAG connector for debugging SoC designs:
  1 - SERIAL RX
  
  2 - SERIAL TX
  
  7 - JTAG TMS
  
  8 - JTAG TDI
  
  9 - JTAG TDO
  
  10 - JTAG TCK