SDT64B is not Arduino FF. It does not define Arduino pins.

Seppo Takalo · Cruz Monrreal II · commit 4c105fc2d776 · 2018-09-01T12:40:38.000-05:00
diff --git a/targets/targets.json b/targets/targets.json
@@ -644,6 +644,7 @@
         "extra_labels_add": ["K64F"],
         "extra_labels_remove": ["FRDM"],
         "components_remove": ["SD"],
+        "supported_form_factors": [],
         "detect_code": ["3105"]
     },
     "EV_COG_AD4050LZ": {
