I use Analog Discovery 2 to analyze SPI line and there is an abnormal spike during SS is set to low. How do I elimenate it?
Hi @Sean Wang
This is crosstalk between signal wires or lack of ground connection.
- As James pointed out, make sure you have proper ground connection between the devices.
- Twist the signal wires with a ground wire, specially the CS and CLK (or use shielded wires).
To reduce ringing use termination like series resistor.
Similar to the HS adapter: https://digilent.com/shop/digital-discovery-high-speed-adapter-and-logic-probes/