diff --git a/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.bin b/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.bin
index 645ac65d6a5990ec2c956b92846affe5a9788619..8ef93c24ff48ca4484d5f592370add563720db44 100644
Binary files a/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.bin and b/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.bin differ
diff --git a/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.hex b/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.hex
index 705e0c1e7e5d8bee03ac89146360c752a0886144..49c45621de4c8a024ac3707fe33426979c051cf2 100644
--- a/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.hex
+++ b/miosix/_tools/bootloaders/stm32/uc_loader_ethboardv2/bootloader.hex
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 :00000001FF
diff --git a/miosix/arch/cortexM3_stm32f2/stm32f207zg_EthBoardV2/boot.cpp b/miosix/arch/cortexM3_stm32f2/stm32f207zg_EthBoardV2/boot.cpp
index ba4c114860e6bc099abeef544ba89f95354a953a..ce595a92ba0e92bb19bb34031b4b0814c0e8b2c0 100644
--- a/miosix/arch/cortexM3_stm32f2/stm32f207zg_EthBoardV2/boot.cpp
+++ b/miosix/arch/cortexM3_stm32f2/stm32f207zg_EthBoardV2/boot.cpp
@@ -82,8 +82,8 @@ void IRQmemoryAndClockInit()
     GPIOF->MODER=0xaa001aaa;
     GPIOG->MODER=0x00000aaa;
     
-    GPIOA->PUPDR=0x00000000;
-    GPIOB->PUPDR=0x0008a020;
+    GPIOA->PUPDR=0x64000000;
+    GPIOB->PUPDR=0x0008a120;
     GPIOC->PUPDR=0xa0008000;
     GPIOD->PUPDR=0x08002080;
     GPIOE->PUPDR=0x00002a80;