Pico GPIOs
GPIO | Input/Ouput | Summary | Description |
---|---|---|---|
0 & 1 | Output | UART TX & RX | Some diagnostic information is written to the UART including error messages if scoppy enounters an unrecoverable error |
2 & 3 | Input - pulled down | CH1 Voltage Range | Currently selected voltage range for channel 1 |
4 & 5 | Input - pulled down | CH2 Voltage Range | Currently selected voltage range for channel 2 |
6 to 13 | Input | Logic Analyzer inputs | Connect up to 8 digital sources (0V to 3.3V) |
22 | Output | Test signal | PWM 1kHz 50% duty cycle - can be connected directly to either of the ADC inputs |
26 | Input | CH1 ADC input | Connect the +ve output of your analog frontend (or signal source) here. Connect the ground of the analog frontend (or signal source) to GND. |
27 | Input | CH2 ADC input | Connect the +ve output of your analog frontend (or signal source) here. Connect the ground of the analog frontend (or signal source) to GND. |
Please note that the test signal and voltage range GPIO assignments changed in version 4 of the firmware (previously they were GPIO 16 and 22 for the test signal, 3 and 4 for the channel 1 voltage range and 6 & 7 for the channel 2 voltage range).