diff --git a/tools/arm_pack_manager/index.json b/tools/arm_pack_manager/index.json
index e0863bf6e7..5a502bbb4e 100644
--- a/tools/arm_pack_manager/index.json
+++ b/tools/arm_pack_manager/index.json
@@ -170717,7 +170717,20 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                0, 
+                2048
+            ], 
+            [
+                1048576, 
+                2048
+            ], 
+            [
+                3145728, 
+                16
+            ]
+        ], 
         "vendor": "Nuvoton:18"
     }, 
     "M453YC3AE": {
@@ -172950,7 +172963,20 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                0, 
+                4096
+            ], 
+            [
+                1048576, 
+                4096
+            ], 
+            [
+                3145728, 
+                16
+            ]
+        ], 
         "vendor": "Nuvoton:18"
     }, 
     "M487KIDAE": {
@@ -293077,7 +293103,20 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                0, 
+                2048
+            ], 
+            [
+                1048576, 
+                2048
+            ], 
+            [
+                3145728, 
+                16
+            ]
+        ], 
         "vendor": "Nuvoton:18"
     }, 
     "NUC472JG8AE": {
@@ -294811,7 +294850,12 @@
                 "units": 1
             }
         }, 
-        "sectors": [], 
+        "sectors": [
+            [
+                0, 
+                2
+            ]
+        ], 
         "vendor": "Renesas:117"
     }, 
     "RC10001": {
@@ -342848,7 +342892,28 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                16
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F215RETx": {
@@ -354909,7 +354974,28 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                4
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F411VCHx": {
@@ -356295,7 +356381,28 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                4
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F413CGUx": {
@@ -357261,7 +357368,24 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                536854528, 
+                4
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F415OGYx": {
@@ -362405,7 +362529,52 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134742016, 
+                16384
+            ], 
+            [
+                134807552, 
+                65536
+            ], 
+            [
+                134873088, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                8
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F437VITx": {
@@ -363741,7 +363910,40 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                135266304, 
+                16384
+            ], 
+            [
+                135331840, 
+                65536
+            ], 
+            [
+                135397376, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                8
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F439ZGTx": {
@@ -364366,7 +364568,28 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                536836096, 
+                528
+            ], 
+            [
+                536854528, 
+                4
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F446VCTx": {
@@ -366339,7 +366562,40 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                135266304, 
+                16384
+            ], 
+            [
+                135331840, 
+                65536
+            ], 
+            [
+                135397376, 
+                131072
+            ], 
+            [
+                536854528, 
+                8
+            ], 
+            [
+                2415919104, 
+                65536
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F469VETx": {
@@ -376589,7 +376845,32 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                2097152, 
+                32768
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2359296, 
+                262144
+            ], 
+            [
+                134217728, 
+                32768
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134479872, 
+                262144
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F746VEHx": {
@@ -377730,7 +378011,32 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                2097152, 
+                32768
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2359296, 
+                262144
+            ], 
+            [
+                134217728, 
+                32768
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134479872, 
+                262144
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F746ZGYx": {
@@ -383982,7 +384288,80 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                2097152, 
+                16384
+            ], 
+            [
+                2097152, 
+                32768
+            ], 
+            [
+                2162688, 
+                65536
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2359296, 
+                262144
+            ], 
+            [
+                3145728, 
+                16384
+            ], 
+            [
+                3211264, 
+                65536
+            ], 
+            [
+                3276800, 
+                131072
+            ], 
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134217728, 
+                32768
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134479872, 
+                262144
+            ], 
+            [
+                135266304, 
+                16384
+            ], 
+            [
+                135331840, 
+                65536
+            ], 
+            [
+                135397376, 
+                131072
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F768AIYx": {
@@ -385593,7 +385972,80 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                2097152, 
+                16384
+            ], 
+            [
+                2097152, 
+                32768
+            ], 
+            [
+                2162688, 
+                65536
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2228224, 
+                131072
+            ], 
+            [
+                2359296, 
+                262144
+            ], 
+            [
+                3145728, 
+                16384
+            ], 
+            [
+                3211264, 
+                65536
+            ], 
+            [
+                3276800, 
+                131072
+            ], 
+            [
+                134217728, 
+                16384
+            ], 
+            [
+                134217728, 
+                32768
+            ], 
+            [
+                134283264, 
+                65536
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134348800, 
+                131072
+            ], 
+            [
+                134479872, 
+                262144
+            ], 
+            [
+                135266304, 
+                16384
+            ], 
+            [
+                135331840, 
+                65536
+            ], 
+            [
+                135397376, 
+                131072
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32F777BITx": {
@@ -390536,7 +390988,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                131072
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32H750IBKx": {
@@ -414309,7 +414766,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L433CBTx": {
@@ -415321,7 +415783,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L433RCYx": {
@@ -416149,7 +416616,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L443RCYx": {
@@ -419553,7 +420025,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L471RCTx": {
@@ -421393,7 +421870,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L475ZETx": {
@@ -422405,7 +422887,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L476VCTx": {
@@ -422681,7 +423168,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L476ZETx": {
@@ -423233,7 +423725,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L486VGTx": {
@@ -423509,7 +424006,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L496QGIx": {
@@ -423969,7 +424471,12 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                2048
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L496ZGYx": {
@@ -425077,7 +425584,16 @@
                 "units": 1
             }
         }, 
-        "sectors": null, 
+        "sectors": [
+            [
+                134217728, 
+                8192
+            ], 
+            [
+                134217728, 
+                4096
+            ]
+        ], 
         "vendor": "STMicroelectronics:13"
     }, 
     "STM32L4R5ZIYx": {
@@ -462159,4 +462675,4 @@
         "vendor": "Nordic Semiconductor:54"
     }, 
     "version": "0.2.0"
-}
+}
\ No newline at end of file
diff --git a/tools/test/targets/target_test.py b/tools/test/targets/target_test.py
index eff7b3f305..da9ba91fa8 100644
--- a/tools/test/targets/target_test.py
+++ b/tools/test/targets/target_test.py
@@ -37,6 +37,21 @@ def test_device_name():
             ("Target %s contains invalid device_name %s" %
              (target.name, target.device_name))
 
+def test_bl_has_sectors():
+    """Assert a bootloader supporting pack has sector information"""
+    cache = Cache(True, True)
+    named_targets = (
+        target for target in TARGETS if
+        (hasattr(target, "device_name") and getattr(target, "bootloader_supported", False))
+    )
+    for target in named_targets:
+        assert target.device_name in cache.index,\
+            ("Target %s contains invalid device_name %s" %
+             (target.name, target.device_name))
+        assert cache.index[target.device_name]["sectors"],\
+            ("Device name %s is misssing sector information" %
+             (target.device_name))
+
 @contextmanager
 def temp_target_file(extra_target, json_filename='custom_targets.json'):
     """Create an extra targets temp file in a context manager