diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
index f8e5b4b..4ff30a3 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/cores/arduino/HardwareSerial.cpp
@@ -159,7 +159,7 @@ void HardwareSerial::begin(
 
         crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
         crm_periph_clock_enable(CRM_UART4_PERIPH_CLOCK, TRUE);
-        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK,TRUE);
+        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
         gpio_pin_remap_config(UART4_GMUX_0010, TRUE);
     }
     else if(_USARTx == UART5)
@@ -171,9 +171,43 @@ void HardwareSerial::begin(
 
         crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);
         crm_periph_clock_enable(CRM_UART5_PERIPH_CLOCK, TRUE);
-        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK,TRUE);
+        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
         gpio_pin_remap_config(UART5_GMUX_0001, TRUE);
     }
+    else if (_USARTx == USART6)
+    {
+        GPIOx = GPIOA;
+        Tx_Pin = GPIO_Pin_4;
+        Rx_Pin = GPIO_Pin_5;
+        USARTx_IRQn = USART6_IRQn;
+
+        crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
+        crm_periph_clock_enable(CRM_USART6_PERIPH_CLOCK, TRUE);
+    }
+    else if (_USARTx == UART7)
+    {
+        GPIOx = GPIOB;
+        Tx_Pin = GPIO_Pin_4;
+        Rx_Pin = GPIO_Pin_3;
+        USARTx_IRQn = UART7_IRQn;
+
+        crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);
+        crm_periph_clock_enable(CRM_UART7_PERIPH_CLOCK, TRUE);
+        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
+        gpio_pin_remap_config(UART7_GMUX, TRUE);
+    }
+    else if (_USARTx == UART8)
+    {
+        GPIOx = GPIOC;
+        Tx_Pin = GPIO_Pin_2;
+        Rx_Pin = GPIO_Pin_3;
+        USARTx_IRQn = UART8_IRQn;
+
+        crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);
+        crm_periph_clock_enable(CRM_UART8_PERIPH_CLOCK, TRUE);
+        crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
+        gpio_pin_remap_config(UART8_GMUX, TRUE);
+    }
     else
     {
         return;
@@ -332,3 +366,30 @@ extern "C" SERIAL_5_IRQ_HANDLER_DEF()
     Serial5.IRQHandler();
 }
 #endif
+
+#if SERIAL_6_ENABLE
+HardwareSerial Serial6(SERIAL_6_USART);
+
+extern "C" SERIAL_6_IRQ_HANDLER_DEF()
+{
+    Serial6.IRQHandler();
+}
+#endif
+
+#if SERIAL_7_ENABLE
+HardwareSerial Serial7(SERIAL_7_UART);
+
+extern "C" SERIAL_7_IRQ_HANDLER_DEF()
+{
+    Serial7.IRQHandler();
+}
+#endif
+
+#if SERIAL_8_ENABLE
+HardwareSerial Serial8(SERIAL_8_UART);
+
+extern "C" SERIAL_8_IRQ_HANDLER_DEF()
+{
+    Serial8.IRQHandler();
+}
+#endif
\ No newline at end of file
diff --git a/cores/arduino/libcore/config/mcu_config.h b/cores/arduino/libcore/config/mcu_config.h
index b7016cb..e257a56 100644
--- a/cores/arduino/libcore/config/mcu_config.h
+++ b/cores/arduino/libcore/config/mcu_config.h
@@ -66,6 +66,24 @@
 #  define SERIAL_5_IRQ_HANDLER_DEF()        void UART5_IRQHandler(void)
 #endif
 
+#define SERIAL_6_ENABLE                     1
+#if SERIAL_6_ENABLE
+#  define SERIAL_6_USART                    USART6
+#  define SERIAL_6_IRQ_HANDLER_DEF()        void USART6_IRQHandler(void)
+#endif
+
+#define SERIAL_7_ENABLE                     1
+#if SERIAL_7_ENABLE
+#  define SERIAL_7_UART                    UART7
+#  define SERIAL_7_IRQ_HANDLER_DEF()        void UART7_IRQHandler(void)
+#endif
+
+#define SERIAL_8_ENABLE                     1
+#if SERIAL_8_ENABLE
+#  define SERIAL_8_UART                    UART8
+#  define SERIAL_8_IRQ_HANDLER_DEF()        void UART8_IRQHandler(void)
+#endif
+
 /* Wire (Software I2C) */
 #define WIRE_USE_FULL_SPEED_I2C             0
 #define WIRE_SDA_PIN                        PB7
diff --git a/package_at32_index.json b/package_at32_index.json
index c7051f8..f072d70 100644
--- a/package_at32_index.json
+++ b/package_at32_index.json
@@ -12,7 +12,7 @@
         {
           "name": "AT32F403ACGU7 Core Board",
           "architecture": "at32f403a",
-          "version": "0.0.6",
+          "version": "0.0.7",
           "category": "Contributed",
           "url": "https://github.com/WeActStudio/ArduinoCore-AT32F4/archive/refs/heads/main.zip",
           "archiveFileName": "ArduinoCore-AT32F4-main.zip",
diff --git a/platform.txt b/platform.txt
index 4cda097..988c3a6 100644
--- a/platform.txt
+++ b/platform.txt
@@ -1,6 +1,6 @@
 ##==============================================##
 name=WeActStudio AT32F403A Boards
-version=0.0.6
+version=0.0.7
 ##==============================================##
 
 ####AT32 compile variables