diff --git a/CHANGELOG.md b/CHANGELOG.md
index e61e039..29a1296 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,15 @@ beta releases are not included in this history. For a full list of all releases,
 
 [//]: # (begin_release_notes)
 
+7.16.0 (2021-05-26)
+===================
+
+Features
+--------
+
+- Targets modified: MultiTech mDot. (#20210526050235)
+
+
 7.15.0 (2021-05-15)
 ===================
 
diff --git a/news/20210524113403.bugfix b/news/20210524113403.bugfix
new file mode 100644
index 0000000..2f178f5
--- /dev/null
+++ b/news/20210524113403.bugfix
@@ -0,0 +1,1 @@
+Fix issue with memory region overrides being ignored.
diff --git a/src/mbed_tools/build/_internal/cmake_file.py b/src/mbed_tools/build/_internal/cmake_file.py
index 09d507c..d6b550b 100644
--- a/src/mbed_tools/build/_internal/cmake_file.py
+++ b/src/mbed_tools/build/_internal/cmake_file.py
@@ -5,6 +5,8 @@
 """Module in charge of CMake file generation."""
 import pathlib
 
+from typing import Any
+
 import jinja2
 
 from mbed_tools.build._internal.config.config import Config
@@ -25,7 +27,13 @@ def render_mbed_config_cmake_template(config: Config, toolchain_name: str, targe
         The rendered mbed_config template.
     """
     env = jinja2.Environment(loader=jinja2.PackageLoader("mbed_tools.build", str(TEMPLATES_DIRECTORY)),)
+    env.filters["to_hex"] = to_hex
     template = env.get_template(TEMPLATE_NAME)
     config["supported_c_libs"] = [x for x in config["supported_c_libs"][toolchain_name.lower()]]
     context = {"target_name": target_name, "toolchain_name": toolchain_name, **config}
     return template.render(context)
+
+
+def to_hex(s: Any) -> str:
+    """Filter to convert integers to hex."""
+    return hex(int(s, 0))
diff --git a/src/mbed_tools/build/_internal/config/config.py b/src/mbed_tools/build/_internal/config/config.py
index bb493f2..7f96862 100644
--- a/src/mbed_tools/build/_internal/config/config.py
+++ b/src/mbed_tools/build/_internal/config/config.py
@@ -8,7 +8,7 @@ import logging
 from collections import UserDict
 from typing import Any, Iterable, Hashable, Callable, List
 
-from mbed_tools.build._internal.config.source import Memory, Override, ConfigSetting
+from mbed_tools.build._internal.config.source import Override, ConfigSetting
 
 logger = logging.getLogger(__name__)
 
@@ -18,15 +18,13 @@ class Config(UserDict):
 
     This object understands how to populate the different 'config sections' which all have different rules for how the
     settings are collected.
-    Applies overrides, appends macros, updates memories, and updates config settings.
+    Applies overrides, appends macros, and updates config settings.
     """
 
     def __setitem__(self, key: Hashable, item: Any) -> None:
         """Set an item based on its key."""
         if key == CONFIG_SECTION:
             self._update_config_section(item)
-        elif key == MEMORIES_SECTION:
-            self._update_memories_section(item)
         elif key == OVERRIDES_SECTION:
             self._handle_overrides(item)
         elif key == MACROS_SECTION:
@@ -69,20 +67,6 @@ class Config(UserDict):
 
         self.data[CONFIG_SECTION] = self.data.get(CONFIG_SECTION, []) + config_settings
 
-    def _update_memories_section(self, memories: List[Memory]) -> None:
-        defined_memories = self.data.get(MEMORIES_SECTION, [])
-        for memory in memories:
-            logger.debug(f"Adding memory settings `{memory.name}: start={memory.start} size={memory.size}`")
-            prev_defined = next((mem for mem in defined_memories if mem.name == memory.name), None)
-            if prev_defined is None:
-                defined_memories.append(memory)
-            else:
-                logger.warning(
-                    f"You are attempting to redefine `{memory.name}` from {prev_defined.namespace}.\n"
-                    f"The values from `{memory.namespace}` will be ignored"
-                )
-        self.data[MEMORIES_SECTION] = defined_memories
-
     def _find_first_config_setting(self, predicate: Callable) -> Any:
         """Find first config setting based on `predicate`.
 
@@ -105,7 +89,6 @@ class Config(UserDict):
 
 CONFIG_SECTION = "config"
 MACROS_SECTION = "macros"
-MEMORIES_SECTION = "memories"
 OVERRIDES_SECTION = "overrides"
 
 
diff --git a/src/mbed_tools/build/_internal/config/source.py b/src/mbed_tools/build/_internal/config/source.py
index 59d01df..54008bc 100644
--- a/src/mbed_tools/build/_internal/config/source.py
+++ b/src/mbed_tools/build/_internal/config/source.py
@@ -28,7 +28,7 @@ def prepare(
 ) -> dict:
     """Prepare a config source for entry into the Config object.
 
-    Extracts memory, config and override settings from the source. Flattens these nested dictionaries out into
+    Extracts config and override settings from the source. Flattens these nested dictionaries out into
     lists of objects which are namespaced in the way the Mbed config system expects.
 
     Args:
@@ -46,11 +46,6 @@ def prepare(
     for key in data:
         data[key] = _sanitise_value(data[key])
 
-    memories = _extract_memories(namespace, data)
-
-    if memories:
-        data["memories"] = memories
-
     if "config" in data:
         data["config"] = _extract_config_settings(namespace, data["config"])
 
@@ -83,31 +78,6 @@ class ConfigSetting:
         self.value = _sanitise_value(self.value)
 
 
-@dataclass
-class Memory:
-    """Representation of a defined RAM/ROM region."""
-
-    name: str
-    namespace: str
-    start: str
-    size: str
-
-    def __post_init__(self) -> None:
-        """Convert start and size to hex format strings."""
-        try:
-            self.start = hex(int(self.start, 0))
-        except ValueError:
-            raise ValueError(
-                f"Value of MBED_{self.name}_START in {self.namespace}, {self.start} is invalid: must be an integer"
-            )
-        try:
-            self.size = hex(int(self.size, 0))
-        except ValueError:
-            raise ValueError(
-                f"Value of MBED_{self.name}_SIZE in {self.namespace}, {self.size} is invalid: must be an integer"
-            )
-
-
 @dataclass
 class Override:
     """Representation of a config override.
@@ -158,27 +128,6 @@ def _extract_config_settings(namespace: str, config_data: dict) -> List[ConfigSe
     return settings
 
 
-def _extract_memories(namespace: str, data: dict) -> List[Memory]:
-    memories = []
-    for mem in ["rom", "ram"]:
-        start_attr = f"mbed_{mem}_start"
-        size_attr = f"mbed_{mem}_size"
-        start = data.get(start_attr)
-        size = data.get(size_attr)
-
-        if size is not None and start is not None:
-            logger.debug(f"Extracting MBED_{mem.upper()} definitions in {namespace}: _START={start}, _SIZE={size}.")
-
-            memory = Memory(mem.upper(), namespace, start, size)
-            memories.append(memory)
-        elif start is not None or size is not None:
-            raise ValueError(
-                f"{size_attr.upper()} and {start_attr.upper()} must be defined together. Only "
-                f"{'START' if start is not None else 'SIZE'} is defined in the lib {namespace}."
-            )
-    return memories
-
-
 def _extract_target_overrides(
     namespace: str, override_data: dict, allowed_target_labels: Iterable[str]
 ) -> List[Override]:
diff --git a/src/mbed_tools/build/_internal/templates/mbed_config.tmpl b/src/mbed_tools/build/_internal/templates/mbed_config.tmpl
index 7fadeb1..89308ac 100644
--- a/src/mbed_tools/build/_internal/templates/mbed_config.tmpl
+++ b/src/mbed_tools/build/_internal/templates/mbed_config.tmpl
@@ -54,6 +54,18 @@ set(MBED_TARGET_DEFINITIONS{% for component in components %}
 {% for form_factor in supported_form_factors %}
     TARGET_FF_{{form_factor}}
 {%- endfor %}
+{% if mbed_rom_start is defined %}
+    MBED_ROM_START={{ mbed_rom_start | to_hex }}
+{%- endif %}
+{% if mbed_rom_size is defined %}
+    MBED_ROM_SIZE={{ mbed_rom_size | to_hex }}
+{%- endif %}
+{% if mbed_ram_start is defined %}
+    MBED_RAM_START={{ mbed_ram_start | to_hex }}
+{%- endif %}
+{% if mbed_ram_size is defined %}
+    MBED_RAM_SIZE={{ mbed_ram_size | to_hex }}
+{%- endif %}
     TARGET_LIKE_MBED
     __MBED__=1
 )
@@ -75,10 +87,6 @@ set(MBED_CONFIG_DEFINITIONS
     "-D{{setting_name}}={{value}}"
     {% endif -%}
 {%- endfor -%}
-{% for memory in memories %}
-    "-DMBED_{{memory.name}}_START={{memory.start}}"
-    "-DMBED_{{memory.name}}_SIZE={{memory.size}}"
-{%- endfor -%}
 {% for macro in macros %}
     "{{macro|replace("\"", "\\\"")}}"
 {%- endfor %}
diff --git a/src/mbed_tools/targets/_internal/data/board_database_snapshot.json b/src/mbed_tools/targets/_internal/data/board_database_snapshot.json
index 6b81247..6ef01a2 100644
--- a/src/mbed_tools/targets/_internal/data/board_database_snapshot.json
+++ b/src/mbed_tools/targets/_internal/data/board_database_snapshot.json
@@ -4921,7 +4921,6 @@
         "slug": "MTS-mDot-F411",
         "build_variant": [],
         "mbed_os_support": [
-            "Mbed OS 2",
             "Mbed OS 5.10",
             "Mbed OS 5.11",
             "Mbed OS 5.12",
@@ -4935,7 +4934,14 @@
             "Mbed OS 5.8",
             "Mbed OS 5.9",
             "Mbed OS 6.0",
-            "Mbed OS 6.1"
+            "Mbed OS 6.1",
+            "Mbed OS 6.2",
+            "Mbed OS 6.3",
+            "Mbed OS 6.4",
+            "Mbed OS 6.5",
+            "Mbed OS 6.6",
+            "Mbed OS 6.7",
+            "Mbed OS 6.8"
         ],
         "mbed_enabled": [
             "Baseline"

diff --git a/tests/build/_internal/config/test_config.py b/tests/build/_internal/config/test_config.py
index c7e2e35..980ed4d 100644
--- a/tests/build/_internal/config/test_config.py
+++ b/tests/build/_internal/config/test_config.py
@@ -2,11 +2,10 @@
 # Copyright (c) 2020-2021 Arm Limited and Contributors. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 #
-import logging
 import pytest
 
 from mbed_tools.build._internal.config.config import Config
-from mbed_tools.build._internal.config.source import prepare, ConfigSetting, Memory, Override
+from mbed_tools.build._internal.config.source import prepare, ConfigSetting, Override
 
 
 class TestConfig:
@@ -25,17 +24,6 @@ class TestConfig:
         with pytest.raises(ValueError, match="lib.param already defined"):
             conf.update(prepare({"config": {"param": {"value": 0}}}, source_name="lib"))
 
-    def test_logs_ignore_mbed_ram_repeated(self, caplog):
-        caplog.set_level(logging.DEBUG)
-        input_dict = {"mbed_ram_size": "0x80000", "mbed_ram_start": "0x24000000"}
-        input_dict2 = {"mbed_ram_size": "0x78000", "mbed_ram_start": "0x24200000"}
-
-        conf = Config(prepare(input_dict, source_name="lib1"))
-        conf.update(prepare(input_dict2, source_name="lib2"))
-
-        assert "values from `lib2` will be ignored" in caplog.text
-        assert conf["memories"] == [Memory("RAM", "lib1", "0x24000000", "0x80000")]
-
     def test_target_overrides_handled(self):
         conf = Config(
             {
diff --git a/tests/build/_internal/config/test_source.py b/tests/build/_internal/config/test_source.py
index b7f4a2a..962315a 100644
--- a/tests/build/_internal/config/test_source.py
+++ b/tests/build/_internal/config/test_source.py
@@ -2,10 +2,8 @@
 # Copyright (c) 2020-2021 Arm Limited and Contributors. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 #
-import pytest
-
 from mbed_tools.build._internal.config import source
-from mbed_tools.build._internal.config.source import Memory, Override
+from mbed_tools.build._internal.config.source import Override
 
 
 class TestPrepareSource:
@@ -120,48 +118,3 @@ class TestPrepareSource:
         assert conf["config"][0].value == {"ETHERNET", "WIFI"}
         assert conf["sectors"] == {0, 2048}
         assert conf["header_info"] == {0, 2048, "bobbins", "magic"}
-
-    def test_memory_attr_extracted(self):
-        lib = {
-            "mbed_ram_size": "0x80000",
-            "mbed_ram_start": "0x24000000",
-            "mbed_rom_size": "0x200000",
-            "mbed_rom_start": "0x08000000",
-        }
-
-        conf = source.prepare(lib, "lib")
-
-        assert Memory("RAM", "lib", "0x24000000", "0x80000") in conf["memories"]
-        assert Memory("ROM", "lib", "0x8000000", "0x200000") in conf["memories"]
-
-    def test_memory_attr_converted_as_hex(self):
-        input_dict = {"mbed_ram_size": "1024", "mbed_ram_start": "0x24000000"}
-
-        conf = source.prepare(input_dict, source_name="lib")
-
-        memory, *_ = conf["memories"]
-        assert memory.size == "0x400"
-
-    def test_raises_memory_size_not_integer(self):
-        input_dict = {"mbed_ram_size": "NOT INT", "mbed_ram_start": "0x24000000"}
-
-        with pytest.raises(ValueError, match="_SIZE in lib, NOT INT is invalid: must be an integer"):
-            source.prepare(input_dict, "lib")
-
-    def test_raises_memory_start_not_integer(self):
-        input_dict = {"mbed_ram_size": "0x80000", "mbed_ram_start": "NOT INT"}
-
-        with pytest.raises(ValueError, match="_START in lib, NOT INT is invalid: must be an integer"):
-            source.prepare(input_dict, "lib")
-
-    def test_raises_memory_size_defined_not_start(self):
-        input_dict = {"mbed_ram_size": "0x80000"}
-
-        with pytest.raises(ValueError, match="Only SIZE is defined"):
-            source.prepare(input_dict)
-
-    def test_raises_memory_start_defined_not_size(self):
-        input_dict = {"mbed_ram_start": "0x24000000"}
-
-        with pytest.raises(ValueError, match="Only START is defined"):
-            source.prepare(input_dict)
diff --git a/tests/build/test_generate_config.py b/tests/build/test_generate_config.py
index b18bb2b..6605f5b 100644
--- a/tests/build/test_generate_config.py
+++ b/tests/build/test_generate_config.py
@@ -48,6 +48,10 @@ TARGET_DATA = {
     "supported_toolchains": ["ARM", "GCC_ARM", "IAR"],
     "trustzone": False,
     "OUTPUT_EXT": "hex",
+    "mbed_ram_start": "0",
+    "mbed_ram_size": "0",
+    "mbed_rom_start": "0",
+    "mbed_rom_size": "0",
 }
 
 
@@ -289,6 +293,10 @@ def test_overrides_target_config_param_from_app(matching_target_and_filter, prog
         ("target.macros", ["DEFINE"], "DEFINE"),
         ("target.device_has", ["NOTHING"], "DEVICE_NOTHING"),
         ("target.features", ["ELECTRICITY"], "FEATURE_ELECTRICITY"),
+        ("target.mbed_rom_start", "99", "MBED_ROM_START=0x63"),
+        ("target.mbed_rom_size", "1010", "MBED_ROM_SIZE=0x3f2"),
+        ("target.mbed_ram_start", "99", "MBED_RAM_START=0x63"),
+        ("target.mbed_ram_size", "1010", "MBED_RAM_SIZE=0x3f2"),
         ("OUTPUT_EXT", "hex", 'MBED_OUTPUT_EXT "hex"'),
     ],
 )

mbed_rom_size values from mbed_app.json are ignored
**Describe the bug**

#270 has implemented mbed_rom_size support in targets.json file,
But it seems that if values is overwritten in the local mbed_app.json file, value is ignored

@wernerlewis 


**To Reproduce**
Steps to reproduce the behavior:

- choose a target with "mbed_rom_size" defined
- change the value in mbed_app.json: "target.mbed_rom_size"
- see in mbed_config.cmake


tests/build/test_generate_config.py::test_overrides_target_non_config_params_from_app[target:
tests/build/_internal/config/test_config.py::TestConfig::test_config_updated tests/build/_internal/config/test_config.py::TestConfig::test_raises_when_trying_to_add_duplicate_config_setting tests/build/_internal/config/test_config.py::TestConfig::test_target_overrides_handled tests/build/_internal/config/test_config.py::TestConfig::test_target_overrides_separate_namespace tests/build/_internal/config/test_config.py::TestConfig::test_lib_overrides_handled tests/build/_internal/config/test_config.py::TestConfig::test_cumulative_fields_can_be_modified tests/build/_internal/config/test_config.py::TestConfig::test_macros_are_appended_to tests/build/_internal/config/test_config.py::TestConfig::test_warns_and_skips_override_for_undefined_config_parameter tests/build/_internal/config/test_config.py::TestConfig::test_ignores_present_option tests/build/_internal/config/test_source.py::TestPrepareSource::test_config_fields_from_target_are_namespaced tests/build/_internal/config/test_source.py::TestPrepareSource::test_override_fields_from_target_are_namespaced tests/build/_internal/config/test_source.py::TestPrepareSource::test_config_fields_from_lib_are_namespaced tests/build/_internal/config/test_source.py::TestPrepareSource::test_override_fields_from_lib_are_namespaced tests/build/_internal/config/test_source.py::TestPrepareSource::test_target_overrides_only_collected_for_valid_targets tests/build/_internal/config/test_source.py::TestPrepareSource::test_cumulative_fields_parsed tests/build/_internal/config/test_source.py::TestPrepareSource::test_converts_config_setting_value_lists_to_sets tests/build/test_generate_config.py::test_target_and_toolchain_collected tests/build/test_generate_config.py::test_custom_targets_data_found tests/build/test_generate_config.py::test_raises_error_when_attempting_to_customize_existing_target tests/build/test_generate_config.py::test_config_param_from_lib_processed_with_default_name_mangling tests/build/test_generate_config.py::test_config_param_from_lib_processed_with_user_set_name tests/build/test_generate_config.py::test_config_param_from_app_processed_with_default_name_mangling tests/build/test_generate_config.py::test_config_param_from_target_processed_with_default_name_mangling tests/build/test_generate_config.py::test_macros_from_lib_collected[single] tests/build/test_generate_config.py::test_macros_from_lib_collected[multiple] tests/build/test_generate_config.py::test_macros_from_app_collected[single] tests/build/test_generate_config.py::test_macros_from_app_collected[multiple] tests/build/test_generate_config.py::test_macros_from_target_collected tests/build/test_generate_config.py::test_target_labels_collected_as_defines tests/build/test_generate_config.py::test_overrides_lib_config_param_from_app[target: tests/build/test_generate_config.py::test_overrides_target_config_param_from_app[target: tests/build/test_generate_config.py::test_overrides_target_config_param_from_lib[target: tests/build/test_generate_config.py::test_overrides_lib_config_param_from_same_lib[target: tests/build/test_generate_config.py::test_raises_when_attempting_to_override_lib_config_param_from_other_lib[target: tests/build/test_generate_config.py::test_target_list_params_can_be_added_to[target: tests/build/test_generate_config.py::test_target_list_params_can_be_removed[target: tests/build/test_generate_config.py::test_warns_when_attempting_to_override_nonexistent_param[target: tests/build/test_generate_config.py::test_settings_from_multiple_libs_included[target: tests/build/test_generate_config.py::test_requires_config_option tests/build/test_generate_config.py::test_target_requires_config_option tests/build/test_generate_config.py::test_config_parsed_when_mbed_os_outside_project_root[target: