diff --git a/pincfg.h b/pincfg.h
new file mode 100644
index 0000000..7779f64
--- /dev/null
+++ b/pincfg.h
@@ -0,0 +1,36 @@
+#ifndef __PINCFG_H__
+#define __PINCFG_H__
+
+typedef enum: uint8_t {
+   PIN_MODE_DIG_IN,
+   PIN_MODE_ANA_IN,
+   PIN_MODE_DIG_OUT,
+   PIN_MODE_ANA_OUT
+} PIN_MODES;
+
+typedef enum: uint8_t {
+   PULLUP_OFF,
+   PULLUP_ON
+} PULLUP_MODES;
+
+struct PinCfg {
+   PIN_MODES Mode;
+   union {
+      struct {
+         PULLUP_MODES Pullup;
+      } CfgDigIn;
+      struct {
+         uint8_t todo;
+      } CfgAnaIn;
+      struct {
+         uint8_t todo;
+      } CfgDigOut;
+      struct {
+         uint8_t todo;
+      } CfgAnaOut;
+   };   
+};
+
+
+
+#endif