ppboards - shields for the DE10-Nano board

ppboards are shields that plug into the two 40-pin 2.54mm GPIO pin headers on the DE10-Nano board.

PP_PMOD

This PulsePins shield board provides output signals broken out on four dual PMOD ports carrying 8 bits each. In addition, the board has dual PMOD connectors for trigger inputs and AUX signals, and regular PMOD connectors for clocking, trigger control and streamer status signals. Other features:

• all signals on connectors have ESD protection diodes
• SMA connectors for external clock and for pulse-per-second (PPS) signals; monitoring LED for PPS signal; optinal built-in 50-ohm terminators
• SMA connector for one trigger signal; it is connected to a fast comparator with a tunable reference voltage; optional 50-ohm terminator; monitoring LED
• two output signals are wired to SMA connectors with 50-ohm line drivers; monitoring LEDs
• Status LEDs: trigger armed, trigger activated, done, buffer error
• Activity & heartbeat LEDs
• QWIIC I2C connector for external modules
• Optional temperature monitor (I2C interface)
• Optional 16-bit DAC (I2C interface) with separate low-noise power supply (possible application is frequency tuning of OCXO; in combination with PPS input this can be turned into a simple GPSDO)
• Testpoints for troubleshooting

KiCAD schematics and PCB, as well as the gerber files for producing the boards, are available here.