diff --git a/sysmoOCTSIM/atmel_start_config.atstart b/sysmoOCTSIM/atmel_start_config.atstart
index 4fda2f8..6357a74 100644
--- a/sysmoOCTSIM/atmel_start_config.atstart
+++ b/sysmoOCTSIM/atmel_start_config.atstart
@@ -702,7 +702,7 @@
       gclk_arch_gen_3_runstdby: false
       gclk_arch_gen_4_enable: true
       gclk_arch_gen_4_idc: false
-      gclk_arch_gen_4_oe: false
+      gclk_arch_gen_4_oe: true
       gclk_arch_gen_4_oov: false
       gclk_arch_gen_4_runstdby: false
       gclk_arch_gen_5_enable: true
@@ -748,7 +748,7 @@
       gclk_gen_3_div: 1
       gclk_gen_3_div_sel: false
       gclk_gen_3_oscillator: 32kHz External Crystal Oscillator (XOSC32K)
-      gclk_gen_4_div: 1
+      gclk_gen_4_div: 2
       gclk_gen_4_div_sel: false
       gclk_gen_4_oscillator: Digital Phase Locked Loop (DPLL1)
       gclk_gen_5_div: 5
@@ -1462,6 +1462,16 @@
     mode: Peripheral IO
     user_label: SIM2_IO
     configuration: null
+  RMII_CLOCK:
+    name: PA10
+    definition: Atmel:SAME54_Drivers:0.0.1::SAME54N19A-AF::pad::PA10
+    mode: Advanced
+    user_label: RMII_CLOCK
+    configuration:
+      pad_direction: Out
+      pad_function: M
+      pad_initial_level: Low
+      pad_pull_config: 'Off'
   SIMCLK_20MHZ:
     name: PA11
     definition: Atmel:SAME54_Drivers:0.0.1::SAME54N19A-AF::pad::PA11
diff --git a/sysmoOCTSIM/atmel_start_pins.h b/sysmoOCTSIM/atmel_start_pins.h
index 0264736..7cbaed5 100644
--- a/sysmoOCTSIM/atmel_start_pins.h
+++ b/sysmoOCTSIM/atmel_start_pins.h
@@ -31,6 +31,7 @@
 #define SIM5_INT GPIO(GPIO_PORTA, 3)
 #define SIM0_IO GPIO(GPIO_PORTA, 4)
 #define SIM2_IO GPIO(GPIO_PORTA, 9)
+#define RMII_CLOCK GPIO(GPIO_PORTA, 10)
 #define SIMCLK_20MHZ GPIO(GPIO_PORTA, 11)
 #define SIM1_IO GPIO(GPIO_PORTA, 16)
 #define VB0 GPIO(GPIO_PORTA, 20)
diff --git a/sysmoOCTSIM/config/hpl_gclk_config.h b/sysmoOCTSIM/config/hpl_gclk_config.h
index 71c26e1..81a1f03 100644
--- a/sysmoOCTSIM/config/hpl_gclk_config.h
+++ b/sysmoOCTSIM/config/hpl_gclk_config.h
@@ -349,7 +349,7 @@
 // <i> Indicates whether Output Enable is enabled or not
 // <id> gclk_arch_gen_4_oe
 #ifndef CONF_GCLK_GEN_4_OE
-#define CONF_GCLK_GEN_4_OE 0
+#define CONF_GCLK_GEN_4_OE 1
 #endif
 
 // <q> Output Off Value
@@ -378,7 +378,7 @@
 //<o> Generic clock generator 4 division <0x0000-0xFFFF>
 // <id> gclk_gen_4_div
 #ifndef CONF_GCLK_GEN_4_DIV
-#define CONF_GCLK_GEN_4_DIV 1
+#define CONF_GCLK_GEN_4_DIV 2
 #endif
 // </h>
 // </e>
diff --git a/sysmoOCTSIM/config/peripheral_clk_config.h b/sysmoOCTSIM/config/peripheral_clk_config.h
index 4bff6ff..2ae1f63 100644
--- a/sysmoOCTSIM/config/peripheral_clk_config.h
+++ b/sysmoOCTSIM/config/peripheral_clk_config.h
@@ -641,7 +641,7 @@
  * \brief SERCOM7's Core Clock frequency
  */
 #ifndef CONF_GCLK_SERCOM7_CORE_FREQUENCY
-#define CONF_GCLK_SERCOM7_CORE_FREQUENCY 100000000
+#define CONF_GCLK_SERCOM7_CORE_FREQUENCY 50000000
 #endif
 
 /**
diff --git a/sysmoOCTSIM/driver_init.c b/sysmoOCTSIM/driver_init.c
index 0b6b190..1233d02 100644
--- a/sysmoOCTSIM/driver_init.c
+++ b/sysmoOCTSIM/driver_init.c
@@ -503,6 +503,53 @@
 
 	gpio_set_pin_function(SIM5_INT, GPIO_PIN_FUNCTION_OFF);
 
+	// GPIO on PA10
+
+	gpio_set_pin_direction(RMII_CLOCK,
+	                       // <y> Pin direction
+	                       // <id> pad_direction
+	                       // <GPIO_DIRECTION_OFF"> Off
+	                       // <GPIO_DIRECTION_IN"> In
+	                       // <GPIO_DIRECTION_OUT"> Out
+	                       GPIO_DIRECTION_OUT);
+
+	gpio_set_pin_level(RMII_CLOCK,
+	                   // <y> Initial level
+	                   // <id> pad_initial_level
+	                   // <false"> Low
+	                   // <true"> High
+	                   false);
+
+	gpio_set_pin_pull_mode(RMII_CLOCK,
+	                       // <y> Pull configuration
+	                       // <id> pad_pull_config
+	                       // <GPIO_PULL_OFF"> Off
+	                       // <GPIO_PULL_UP"> Pull-up
+	                       // <GPIO_PULL_DOWN"> Pull-down
+	                       GPIO_PULL_OFF);
+
+	gpio_set_pin_function(RMII_CLOCK,
+	                      // <y> Pin function
+	                      // <id> pad_function
+	                      // <i> Auto : use driver pinmux if signal is imported by driver, else turn off function
+	                      // <GPIO_PIN_FUNCTION_OFF"> Auto
+	                      // <GPIO_PIN_FUNCTION_OFF"> Off
+	                      // <GPIO_PIN_FUNCTION_A"> A
+	                      // <GPIO_PIN_FUNCTION_B"> B
+	                      // <GPIO_PIN_FUNCTION_C"> C
+	                      // <GPIO_PIN_FUNCTION_D"> D
+	                      // <GPIO_PIN_FUNCTION_E"> E
+	                      // <GPIO_PIN_FUNCTION_F"> F
+	                      // <GPIO_PIN_FUNCTION_G"> G
+	                      // <GPIO_PIN_FUNCTION_H"> H
+	                      // <GPIO_PIN_FUNCTION_I"> I
+	                      // <GPIO_PIN_FUNCTION_J"> J
+	                      // <GPIO_PIN_FUNCTION_K"> K
+	                      // <GPIO_PIN_FUNCTION_L"> L
+	                      // <GPIO_PIN_FUNCTION_M"> M
+	                      // <GPIO_PIN_FUNCTION_N"> N
+	                      GPIO_PIN_FUNCTION_M);
+
 	// GPIO on PA11
 
 	gpio_set_pin_direction(SIMCLK_20MHZ,