diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PeripheralPins.c
index def0f64c79..ca5fcf9134 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PeripheralPins.c
@@ -55,6 +55,8 @@ const PinMap PinMap_ADC[] = {
     {PC_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC_IN13
     {PC_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC_IN14
     {PC_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC_IN15
+    {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // ADC_IN16
+    {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // ADC_IN17
     {NC,   NC,    0}
 };
 
diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PinNames.h b/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PinNames.h
index 7901a63198..a4253c997f 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PinNames.h
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_BLUEPILL_F103C8/PinNames.h
@@ -43,14 +43,14 @@ extern "C" {
 #define STM_PIN_DATA_EXT(MODE, PUPD, AFNUM, CHANNEL, INVERTED)  ((int)(((MODE     & 0x0F) <<  0) |\
                                                                        ((PUPD     & 0x07) <<  4) |\
                                                                        ((AFNUM    & 0x0F) <<  7) |\
-                                                                       ((CHANNEL  & 0x0F) << 11) |\
-                                                                       ((INVERTED & 0x01) << 15)))
+                                                                       ((CHANNEL  & 0x1F) << 11) |\
+                                                                       ((INVERTED & 0x01) << 16)))
 
-#define STM_PIN_MODE(X)   (((X) >> 0) & 0x0F)
-#define STM_PIN_PUPD(X)   (((X) >> 4) & 0x07)
-#define STM_PIN_AFNUM(X)  (((X) >> 7) & 0x0F)
-#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x0F)
-#define STM_PIN_INVERTED(X) (((X) >> 15) & 0x01)
+#define STM_PIN_MODE(X)     (((X) >>  0) & 0x0F)
+#define STM_PIN_PUPD(X)     (((X) >>  4) & 0x07)
+#define STM_PIN_AFNUM(X)    (((X) >>  7) & 0x0F)
+#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x1F)
+#define STM_PIN_INVERTED(X) (((X) >> 16) & 0x01)
 
 #define STM_MODE_INPUT              (0)
 #define STM_MODE_OUTPUT_PP          (1)
@@ -130,6 +130,10 @@ typedef enum {
 
     PD_2  = 0x32,
 
+    // ADC internal channels
+    ADC_TEMP = 0xF0,
+    ADC_VREF = 0xF1,
+
     // PCB printout
     A0          = PA_0,
     A1          = PA_1,
diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PeripheralPins.c
index 3c56da6e45..38e2827c25 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PeripheralPins.c
@@ -55,6 +55,8 @@ const PinMap PinMap_ADC[] = {
     {PC_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC_IN13
     {PC_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC_IN14
     {PC_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC_IN15
+    {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // ADC_IN16
+    {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // ADC_IN17
     {NC,   NC,    0}
 };
 
diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PinNames.h b/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PinNames.h
index ef766d40c4..5cdac4ee4a 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PinNames.h
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/PinNames.h
@@ -43,14 +43,14 @@ extern "C" {
 #define STM_PIN_DATA_EXT(MODE, PUPD, AFNUM, CHANNEL, INVERTED)  ((int)(((MODE     & 0x0F) <<  0) |\
                                                                        ((PUPD     & 0x07) <<  4) |\
                                                                        ((AFNUM    & 0x0F) <<  7) |\
-                                                                       ((CHANNEL  & 0x0F) << 11) |\
-                                                                       ((INVERTED & 0x01) << 15)))
+                                                                       ((CHANNEL  & 0x1F) << 11) |\
+                                                                       ((INVERTED & 0x01) << 16)))
 
-#define STM_PIN_MODE(X)   (((X) >> 0) & 0x0F)
-#define STM_PIN_PUPD(X)   (((X) >> 4) & 0x07)
-#define STM_PIN_AFNUM(X)  (((X) >> 7) & 0x0F)
-#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x0F)
-#define STM_PIN_INVERTED(X) (((X) >> 15) & 0x01)
+#define STM_PIN_MODE(X)     (((X) >>  0) & 0x0F)
+#define STM_PIN_PUPD(X)     (((X) >>  4) & 0x07)
+#define STM_PIN_AFNUM(X)    (((X) >>  7) & 0x0F)
+#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x1F)
+#define STM_PIN_INVERTED(X) (((X) >> 16) & 0x01)
 
 #define STM_MODE_INPUT              (0)
 #define STM_MODE_OUTPUT_PP          (1)
@@ -132,6 +132,10 @@ typedef enum {
     PD_1  = 0x31,
     PD_2  = 0x32,
 
+    // ADC internal channels
+    ADC_TEMP = 0xF0,
+    ADC_VREF = 0xF1,
+
     // Arduino connector namings
     PA0          = PA_0,
     PA1          = PA_1,
diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PeripheralPins.c
index fe9360e2b5..444cd36216 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PeripheralPins.c
@@ -55,6 +55,8 @@ const PinMap PinMap_ADC[] = {
     {PC_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC_IN13
     {PC_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC_IN14
     {PC_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC_IN15
+    {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // ADC_IN16
+    {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // ADC_IN17
     {NC,   NC,    0}
 };
 
diff --git a/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PinNames.h b/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PinNames.h
index 87efd687a6..cbfd8f673d 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PinNames.h
+++ b/targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/PinNames.h
@@ -43,14 +43,14 @@ extern "C" {
 #define STM_PIN_DATA_EXT(MODE, PUPD, AFNUM, CHANNEL, INVERTED)  ((int)(((MODE     & 0x0F) <<  0) |\
                                                                        ((PUPD     & 0x07) <<  4) |\
                                                                        ((AFNUM    & 0x0F) <<  7) |\
-                                                                       ((CHANNEL  & 0x0F) << 11) |\
-                                                                       ((INVERTED & 0x01) << 15)))
+                                                                       ((CHANNEL  & 0x1F) << 11) |\
+                                                                       ((INVERTED & 0x01) << 16)))
 
-#define STM_PIN_MODE(X)   (((X) >> 0) & 0x0F)
-#define STM_PIN_PUPD(X)   (((X) >> 4) & 0x07)
-#define STM_PIN_AFNUM(X)  (((X) >> 7) & 0x0F)
-#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x0F)
-#define STM_PIN_INVERTED(X) (((X) >> 15) & 0x01)
+#define STM_PIN_MODE(X)     (((X) >>  0) & 0x0F)
+#define STM_PIN_PUPD(X)     (((X) >>  4) & 0x07)
+#define STM_PIN_AFNUM(X)    (((X) >>  7) & 0x0F)
+#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x1F)
+#define STM_PIN_INVERTED(X) (((X) >> 16) & 0x01)
 
 #define STM_MODE_INPUT              (0)
 #define STM_MODE_OUTPUT_PP          (1)
@@ -130,6 +130,10 @@ typedef enum {
 
     PD_2  = 0x32,
 
+    // ADC internal channels
+    ADC_TEMP = 0xF0,
+    ADC_VREF = 0xF1,
+
     // Arduino connector namings
     A0          = PA_0,
     A1          = PA_1,
diff --git a/targets/TARGET_STM/TARGET_STM32F1/analogin_api.c b/targets/TARGET_STM/TARGET_STM32F1/analogin_api.c
index 3f102b0e16..d419d87a6b 100644
--- a/targets/TARGET_STM/TARGET_STM32F1/analogin_api.c
+++ b/targets/TARGET_STM/TARGET_STM32F1/analogin_api.c
@@ -1,5 +1,5 @@
 /* mbed Microcontroller Library
- * Copyright (c) 2014, STMicroelectronics
+ * Copyright (c) 2016, STMicroelectronics
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,8 +52,10 @@ void analogin_init(analogin_t *obj, PinName pin)
     MBED_ASSERT(function != (uint32_t)NC);
     obj->channel = STM_PIN_CHANNEL(function);
 
-    // Configure GPIO
-    pinmap_pinout(pin, PinMap_ADC);
+    // Configure GPIO excepted for internal channels (Temperature, Vref)
+    if ((obj->channel != 16) && (obj->channel != 17)) {
+        pinmap_pinout(pin, PinMap_ADC);
+    }
 
     // Save pin number for the read function
     obj->pin = pin;
@@ -147,6 +149,12 @@ static inline uint16_t adc_read(analogin_t *obj)
         case 15:
             sConfig.Channel = ADC_CHANNEL_15;
             break;
+        case 16:
+            sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
+            break;
+        case 17:
+            sConfig.Channel = ADC_CHANNEL_VREFINT;
+            break;
         default:
             return 0;
     }