diff --git a/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig b/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
index 1ca2946245..7c016a9621 100644
--- a/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
@@ -60,7 +60,7 @@ CONFIG_DEFAULT_SMALL=y
 CONFIG_DEV_FIFO_SIZE=0
 CONFIG_DEV_PIPE_MAXSIZE=1024
 CONFIG_DEV_PIPE_SIZE=70
-CONFIG_ETH0_PHY_DP83848C=y
+CONFIG_ETH0_PHY_LAN8742A=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_FAT_DMAMEMORY=y
 CONFIG_FAT_LCNAMES=y
@@ -200,12 +200,12 @@ CONFIG_STM32H7_I2C4=y
 CONFIG_STM32H7_I2C_DYNTIMEO=y
 CONFIG_STM32H7_I2C_DYNTIMEO_STARTSTOP=10
 CONFIG_STM32H7_OTGFS=y
-CONFIG_STM32H7_PHYADDR=1
-CONFIG_STM32H7_PHYSR=16
-CONFIG_STM32H7_PHYSR_100MBPS=0x0
-CONFIG_STM32H7_PHYSR_FULLDUPLEX=0x01
-CONFIG_STM32H7_PHYSR_MODE=0x04
-CONFIG_STM32H7_PHYSR_SPEED=0x2
+CONFIG_STM32H7_PHYADDR=0
+CONFIG_STM32H7_PHYSR=31
+CONFIG_STM32H7_PHYSR_100MBPS=0x8
+CONFIG_STM32H7_PHYSR_FULLDUPLEX=0x10
+CONFIG_STM32H7_PHYSR_MODE=0x10
+CONFIG_STM32H7_PHYSR_SPEED=0x8
 CONFIG_STM32H7_PROGMEM=y
 CONFIG_STM32H7_RTC=y
 CONFIG_STM32H7_RTC_MAGIC_REG=1
diff --git a/boards/px4/fmu-v6x/nuttx-config/stackcheck/defconfig b/boards/px4/fmu-v6x/nuttx-config/stackcheck/defconfig
index c2e86f3e86..af55ab4785 100644
--- a/boards/px4/fmu-v6x/nuttx-config/stackcheck/defconfig
+++ b/boards/px4/fmu-v6x/nuttx-config/stackcheck/defconfig
@@ -61,6 +61,7 @@ CONFIG_DEFAULT_SMALL=y
 CONFIG_DEV_FIFO_SIZE=0
 CONFIG_DEV_PIPE_MAXSIZE=1024
 CONFIG_DEV_PIPE_SIZE=70
+CONFIG_ETH0_PHY_LAN8742A=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_FAT_DMAMEMORY=y
 CONFIG_FAT_LCNAMES=y
@@ -200,11 +201,12 @@ CONFIG_STM32H7_I2C4=y
 CONFIG_STM32H7_I2C_DYNTIMEO=y
 CONFIG_STM32H7_I2C_DYNTIMEO_STARTSTOP=10
 CONFIG_STM32H7_OTGFS=y
-CONFIG_STM32H7_PHYSR=16
-CONFIG_STM32H7_PHYSR_100MBPS=0x0
-CONFIG_STM32H7_PHYSR_FULLDUPLEX=0x01
-CONFIG_STM32H7_PHYSR_MODE=0x04
-CONFIG_STM32H7_PHYSR_SPEED=0x2
+CONFIG_STM32H7_PHYADDR=0
+CONFIG_STM32H7_PHYSR=31
+CONFIG_STM32H7_PHYSR_100MBPS=0x8
+CONFIG_STM32H7_PHYSR_FULLDUPLEX=0x10
+CONFIG_STM32H7_PHYSR_MODE=0x10
+CONFIG_STM32H7_PHYSR_SPEED=0x8
 CONFIG_STM32H7_PROGMEM=y
 CONFIG_STM32H7_RTC=y
 CONFIG_STM32H7_RTC_MAGIC_REG=1