diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/config/sdk_config.h b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/config/sdk_config.h
index 451c125b35..af3f0de8c6 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/config/sdk_config.h
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/config/sdk_config.h
@@ -8557,9 +8557,7 @@
 // <1=> NRF_CLOCK_LF_SRC_XTAL
 // <2=> NRF_CLOCK_LF_SRC_SYNTH
 
-#ifndef NRF_SDH_CLOCK_LF_SRC
-#define NRF_SDH_CLOCK_LF_SRC 1
-#endif
+#include "nrf5x_lf_clk_helper.h"
 
 // <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval.
 #ifndef NRF_SDH_CLOCK_LF_RC_CTIV
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/config/sdk_config.h b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/config/sdk_config.h
index 201402a18e..c342fae1f0 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/config/sdk_config.h
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/config/sdk_config.h
@@ -8556,9 +8556,7 @@
 // <1=> NRF_CLOCK_LF_SRC_XTAL
 // <2=> NRF_CLOCK_LF_SRC_SYNTH
 
-#ifndef NRF_SDH_CLOCK_LF_SRC
-#define NRF_SDH_CLOCK_LF_SRC 1
-#endif
+#include "nrf5x_lf_clk_helper.h"
 
 // <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval.
 #ifndef NRF_SDH_CLOCK_LF_RC_CTIV
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_FULL/mbed_lib.json b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_FULL/mbed_lib.json
index 6fdffbe148..bb625ad33f 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_FULL/mbed_lib.json
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_FULL/mbed_lib.json
@@ -4,9 +4,6 @@
         "SOFTDEVICE_PRESENT=1",
         "S132",
         "BLE_STACK_SUPPORT_REQD",
-        "NRF_SDH_CLOCK_LF_SRC=1",
-        "NRF_SDH_CLOCK_LF_RC_CTIV=0",
-        "NRF_SDH_CLOCK_LF_RC_TEMP_CTIV=0",
         "NRF_SDH_CLOCK_LF_XTAL_ACCURACY=7",
         "NRF_SD_BLE_API_VERSION=5",
         "NRF_SDH_ENABLED=1",
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_OTA/mbed_lib.json b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_OTA/mbed_lib.json
index 6fdffbe148..bb625ad33f 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_OTA/mbed_lib.json
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S132_OTA/mbed_lib.json
@@ -4,9 +4,6 @@
         "SOFTDEVICE_PRESENT=1",
         "S132",
         "BLE_STACK_SUPPORT_REQD",
-        "NRF_SDH_CLOCK_LF_SRC=1",
-        "NRF_SDH_CLOCK_LF_RC_CTIV=0",
-        "NRF_SDH_CLOCK_LF_RC_TEMP_CTIV=0",
         "NRF_SDH_CLOCK_LF_XTAL_ACCURACY=7",
         "NRF_SD_BLE_API_VERSION=5",
         "NRF_SDH_ENABLED=1",
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_FULL/mbed_lib.json b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_FULL/mbed_lib.json
index 0d1c884510..7189ece9f9 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_FULL/mbed_lib.json
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_FULL/mbed_lib.json
@@ -4,9 +4,6 @@
         "SOFTDEVICE_PRESENT=1",
         "S140",
         "BLE_STACK_SUPPORT_REQD",
-        "NRF_SDH_CLOCK_LF_SRC=1",
-        "NRF_SDH_CLOCK_LF_RC_CTIV=0",
-        "NRF_SDH_CLOCK_LF_RC_TEMP_CTIV=0",
         "NRF_SDH_CLOCK_LF_XTAL_ACCURACY=7",
         "NRF_SD_BLE_API_VERSION=5",
         "NRF_SDH_ENABLED=1",
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_OTA/mbed_lib.json b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_OTA/mbed_lib.json
index 0d1c884510..7189ece9f9 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_OTA/mbed_lib.json
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_SDK_14_2/TARGET_SOFTDEVICE_S140_OTA/mbed_lib.json
@@ -4,9 +4,6 @@
         "SOFTDEVICE_PRESENT=1",
         "S140",
         "BLE_STACK_SUPPORT_REQD",
-        "NRF_SDH_CLOCK_LF_SRC=1",
-        "NRF_SDH_CLOCK_LF_RC_CTIV=0",
-        "NRF_SDH_CLOCK_LF_RC_TEMP_CTIV=0",
         "NRF_SDH_CLOCK_LF_XTAL_ACCURACY=7",
         "NRF_SD_BLE_API_VERSION=5",
         "NRF_SDH_ENABLED=1",
diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/nrf5x_lf_clk_helper.h b/targets/TARGET_NORDIC/TARGET_NRF5x/nrf5x_lf_clk_helper.h
index 08744be767..fb0d5cccbb 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/nrf5x_lf_clk_helper.h
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/nrf5x_lf_clk_helper.h
@@ -43,6 +43,18 @@
     #warning No configuration for LF clock source. Xtal source will be used as a default configuration.
 #endif
 
+#define DEFAULT_LFCLK_CONF_ACCURACY NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM
+
+#ifdef NRF52
+    #define MAX_LFCLK_CONF_RC_CTIV    32
+#else
+    #define MAX_LFCLK_CONF_RC_CTIV    64
+#endif
+
+#define MAX_LFCLK_CONF_RC_TEMP_CTIV   33
+
+#define DEFAULT_LFCLK_CONF_RC_CTIV 16     // Check temperature every 16 * 250ms.
+#define DEFAULT_LFCLK_CONF_RC_TEMP_CTIV 1 // Only calibrate if temperature has changed.
 
 
 #define NRF_LF_SRC_XTAL  2 
@@ -50,10 +62,38 @@
 #define NRF_LF_SRC_RC    4
 
 #if MBED_CONF_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_SYNTH
+    #define NRF_SDH_CLOCK_LF_SRC NRF_CLOCK_LF_SRC_SYNTH
+    #define NRF_SDH_CLOCK_LF_RC_CTIV      0 // Must be 0 if source is not NRF_CLOCK_LF_SRC_RC.
+    #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 0 // Must be 0 if source is not NRF_CLOCK_LF_SRC_RC.
     #define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Synth)
 #elif MBED_CONF_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_XTAL
+    #define NRF_SDH_CLOCK_LF_SRC NRF_CLOCK_LF_SRC_XTAL
+    #define NRF_SDH_CLOCK_LF_RC_CTIV      0 // Must be 0 if source is not NRF_CLOCK_LF_SRC_RC.
+    #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 0 // Must be 0 if source is not NRF_CLOCK_LF_SRC_RC.
     #define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Xtal)
 #elif MBED_CONF_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_RC
+    #define NRF_SDH_CLOCK_LF_SRC NRF_CLOCK_LF_SRC_RC
+
+    #ifdef MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_TIMER_INTERVAL
+        #define NRF_SDH_CLOCK_LF_RC_CTIV MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_TIMER_INTERVAL
+    #else
+        #define NRF_SDH_CLOCK_LF_RC_CTIV DEFAULT_LFCLK_CONF_RC_CTIV
+    #endif
+
+    #ifdef MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_MODE_CONFIG
+        #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_MODE_CONFIG
+    #else
+        #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV DEFAULT_LFCLK_CONF_RC_TEMP_CTIV
+    #endif
+
+    #if (NRF_SDH_CLOCK_LF_RC_CTIV < 1) || (NRF_SDH_CLOCK_LF_RC_CTIV > MAX_LFCLK_CONF_RC_CTIV)
+        #error Calibration timer interval out of range!
+    #endif
+
+    #if (NRF_SDH_CLOCK_LF_RC_TEMP_CTIV < 0 ) || (NRF_SDH_CLOCK_LF_RC_TEMP_CTIV > 33)
+        #error Number/mode of LF RC calibration intervals out of range!
+    #endif
+
     #define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_RC)
 #else
     #error Bad LFCLK configuration. Declare proper source through mbed configuration.