diff --git a/targets/TARGET_STM/TARGET_STM32G0/objects.h b/targets/TARGET_STM/TARGET_STM32G0/objects.h
index afeaf5d8028..3f9ecf736ca 100644
--- a/targets/TARGET_STM/TARGET_STM32G0/objects.h
+++ b/targets/TARGET_STM/TARGET_STM32G0/objects.h
@@ -28,6 +28,8 @@
 extern "C" {
 #endif
 
+#define RTC_WKUP_IRQn RTC_TAMP_IRQn
+
 struct gpio_irq_s {
     IRQn_Type irq_n;
     uint32_t irq_index;
diff --git a/targets/TARGET_STM/TARGET_STM32G0/serial_device.c b/targets/TARGET_STM/TARGET_STM32G0/serial_device.c
index 9ca9cf620c8..07f47048f20 100644
--- a/targets/TARGET_STM/TARGET_STM32G0/serial_device.c
+++ b/targets/TARGET_STM/TARGET_STM32G0/serial_device.c
@@ -129,24 +129,32 @@ void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
 
 #if defined(USART3_BASE)
     if (obj_s->uart == UART_3) {
+#if defined(LPUART1_BASE)
         irq_n = USART3_4_LPUART1_IRQn;
+#else
+        irq_n = USART3_4_IRQn;
+#endif
         vector = (uint32_t)&uart3_irq;
     }
 #endif
 
 #if defined(USART4_BASE)
     if (obj_s->uart == UART_4) {
+#if defined(LPUART1_BASE)
         irq_n = USART3_4_LPUART1_IRQn;
+#else
+        irq_n = USART3_4_IRQn;
+#endif
         vector = (uint32_t)&uart4_irq;
     }
 #endif
 
 #if defined(LPUART1_BASE)
     if (obj_s->uart == LPUART_1) {
-#if defined(STM32G031xx)
-        irq_n = LPUART1_IRQn;
-#else
+#if defined(USART3_BASE)
         irq_n = USART3_4_LPUART1_IRQn;
+#else
+        irq_n = LPUART1_IRQn;
 #endif
         vector = (uint32_t)&lpuart1_irq;
     }
@@ -326,21 +334,29 @@ static IRQn_Type serial_get_irq_n(UARTName uart_name)
 #endif
 #if defined(USART3_BASE)
         case UART_3:
+#if defined(LPUART1_BASE)
             irq_n = USART3_4_LPUART1_IRQn;
+#else
+            irq_n = USART3_4_IRQn;
+#endif
             break;
 #endif
 #if defined(USART4_BASE)
         case UART_4:
+#if defined(LPUART1_BASE)
             irq_n = USART3_4_LPUART1_IRQn;
+#else
+            irq_n = USART3_4_IRQn;
+#endif
             break;
 #endif
 
 #if defined(LPUART1_BASE)
         case LPUART_1:
-#if defined(STM32G031xx)
-            irq_n = LPUART1_IRQn;
-#else
+#if defined(USART3_BASE)
             irq_n = USART3_4_LPUART1_IRQn;
+#else
+            irq_n = LPUART1_IRQn;
 #endif
             break;
 #endif
diff --git a/targets/TARGET_STM/TARGET_STM32G0/us_ticker_data.h b/targets/TARGET_STM/TARGET_STM32G0/us_ticker_data.h
index 8a3b534a9b8..089e240da83 100644
--- a/targets/TARGET_STM/TARGET_STM32G0/us_ticker_data.h
+++ b/targets/TARGET_STM/TARGET_STM32G0/us_ticker_data.h
@@ -2,11 +2,11 @@
  * SPDX-License-Identifier: BSD-3-Clause
  ******************************************************************************
  *
- * Copyright (c) 2017 STMicroelectronics. 
+ * Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.
  *
  * This software component is licensed by ST under BSD 3-Clause license,
- * the "License"; You may not use this file except in compliance with the 
+ * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
@@ -16,13 +16,15 @@
 #define __US_TICKER_DATA_H
 
 #ifdef __cplusplus
- extern "C" {
+extern "C" {
 #endif
 
 #include "stm32g0xx.h"
 #include "stm32g0xx_ll_tim.h"
 #include "cmsis_nvic.h"
-   
+
+#if defined TIM2_BASE
+
 #define TIM_MST      TIM2
 #define TIM_MST_IRQ  TIM2_IRQn
 #define TIM_MST_RCC  __TIM2_CLK_ENABLE()
@@ -33,12 +35,24 @@
 
 #define TIM_MST_BIT_WIDTH  32 // 16 or 32
 
-#define TIM_MST_PCLK  1 // Select the peripheral clock number (1 or 2)
+#else // TIM2_BASE
+
+#define TIM_MST      TIM3
+#define TIM_MST_IRQ  TIM3_IRQn
+#define TIM_MST_RCC  __TIM3_CLK_ENABLE()
+#define TIM_MST_DBGMCU_FREEZE  __HAL_DBGMCU_FREEZE_TIM3()
+
+#define TIM_MST_RESET_ON   __TIM3_FORCE_RESET()
+#define TIM_MST_RESET_OFF  __TIM3_RELEASE_RESET()
 
+#define TIM_MST_BIT_WIDTH  16 // 16 or 32
+
+#endif // TIM2_BASE
+
+#define TIM_MST_PCLK  1 // Select the peripheral clock number (1 or 2)
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif // __US_TICKER_DATA_H
-
diff --git a/targets/targets.json b/targets/targets.json
index a43c7afc9e9..cabc9e114d4 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -2456,6 +2456,26 @@
         ],
         "device_name": "STM32G031K8Tx"
     },
+    "MCU_STM32G070xx": {
+        "inherits": [
+            "MCU_STM32G0"
+        ],
+        "public": false,
+        "extra_labels_add": [
+            "STM32G070xx"
+        ],
+        "macros_add": [
+            "STM32G070xx"
+        ],
+        "macros_remove": [
+            "EXTRA_IDLE_STACK_REQUIRED",
+            "MBED_TICKLESS"
+        ],
+        "overrides": {
+            "lpticker_delay_ticks": 1,
+            "lpticker_lptim": "0"
+        }
+    },
     "MCU_STM32G071xx": {
         "inherits": [
             "MCU_STM32G0"