diff --git a/NmraDcc.cpp b/NmraDcc.cpp
index 82f9fa8..1742e84 100644
--- a/NmraDcc.cpp
+++ b/NmraDcc.cpp
@@ -264,7 +264,10 @@
     static byte  ISRWatch;  // Interrupt Handler Edge Filter
 #elif defined ( ARDUINO_AVR_NANO_EVERY )
     static PinStatus ISREdge;	// Holder of the Next Edge we're looking for: RISING or FALLING
-#elif defined ( ARDUINO_ARCH_RP2040)
+#elif defined ( ARDUINO_ARCH_RP2040) 
+    static PinStatus ISREdge;	// Holder of the Next Edge we're looking for: RISING or FALLING
+    static byte  ISRWatch;  // Interrupt Handler Edge Filter
+#elif defined ( ARDUINO_ARCH_RENESAS_UNO) 
     static PinStatus ISREdge;	// Holder of the Next Edge we're looking for: RISING or FALLING
     static byte  ISRWatch;  // Interrupt Handler Edge Filter
 #else
diff --git a/NmraDcc.h b/NmraDcc.h
index 490a72c..f8fde7c 100644
--- a/NmraDcc.h
+++ b/NmraDcc.h
@@ -127,7 +127,9 @@ typedef struct
     #define PRIO_DCC_IRQ    9
     #define PRIO_SYSTIC     8               // MUST be higher priority than DCC Irq
 #elif defined(ARDUINO_ARCH_RP2040)
-    #define MAXCV    256	     				    // todo: maybe somebody knows a good define for it
+    #define MAXCV    256	     			    // todo: maybe somebody knows a good define for it
+#elif defined ( ARDUINO_ARCH_RENESAS_UNO)
+    #define MAXCV	EEPROM.length()
 #elif defined(ARDUINO_SAMD_ZERO) 
     #define MAXCV    EEPROM_EMULATION_SIZE
 #else