Connecting Buttons to MCP23S17
Thought for 38 sec
Below is a summary of the connections:
All eight tactile switches are now wired as inputs to the MCP23S17 (U1).
As a next step, you might consider adding pull-up resistors on these lines (if not using internal pull-ups) to ensure stable logic levels.
Add pull-up resistors for each button input to ensure stable logic levels when they're not being pressed.
Thought for 50 sec
Below is a summary of the added pull-up resistor connections:
Table
Each pull-up resistor is connected between the respective MCP23S17 input and the supply (VCC). This ensures that the digital inputs remain at a stable logic high when the corresponding tactile switches are not pressed.
A recommended next step is to verify that the voltage level for VCC matches the operating range specified in the MCP23S17 datasheet.
Power section passive components
Schematic finalization
Additional components
