2.7 Test C-Connector Signals

Check List · Step 7 of 12 · Switch the C connector EN / STP / DIR signals one at a time

🎯 Objective

The XYYZA test file uses the final C connector as three ordinary diagnostic outputs. Follow the commands from top to bottom and confirm each indicator switches independently.

Keep the external driver disconnected. These commands control the pins assigned by the active YAML. Do not reuse them on another board without checking that board’s configuration.

V4.7B pinmap showing the C EN STP DIR GND connector

Use the last physical driver group in numbered area ⑩: C EN = I2SO.23, C STP = I2SO.21, C DIR = I2SO.20. Click to enlarge.

🧪 How to Test

Open WebUI Console. Send one row, observe the indicated C-connector LED or measure the signal relative to C GND, then continue to the next row.

M7→C EN · I2SO.23ON

M9→C ENOFF

M8→C STP · I2SO.21ON

M9→C STPOFF

M64 P0→C DIR · I2SO.20ON

M65 P0→C DIROFF

✅ Pass: C EN follows M7/M9, C STP follows M8/M9, C DIR follows M64 P0/M65 P0, and only the selected signal changes.

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