diff --git a/src/target/arm.h b/src/target/arm.h
index f3abd6cba..28e533019 100644
--- a/src/target/arm.h
+++ b/src/target/arm.h
@@ -61,6 +61,7 @@ enum arm_arch {
 /** Known ARM implementor IDs */
 enum arm_implementor {
 	ARM_IMPLEMENTOR_ARM = 0x41,
+	ARM_IMPLEMENTOR_REALTEK = 0x72,
 };
 
 /**
diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c
index 87a884552..014ceaeba 100644
--- a/src/target/cortex_m.c
+++ b/src/target/cortex_m.c
@@ -111,6 +111,17 @@ static const struct cortex_m_part_info cortex_m_parts[] = {
 		.arch = ARM_ARCH_V8M,
 		.flags = CORTEX_M_F_HAS_FPV5,
 	},
+	{
+		.impl_part = REALTEK_M200_PARTNO,
+		.name = "Real-M200 (KM0)",
+		.arch = ARM_ARCH_V8M,
+	},
+	{
+		.impl_part = REALTEK_M300_PARTNO,
+		.name = "Real-M300 (KM4)",
+		.arch = ARM_ARCH_V8M,
+		.flags = CORTEX_M_F_HAS_FPV5,
+	},
 };
 
 /* forward declarations */
diff --git a/src/target/cortex_m.h b/src/target/cortex_m.h
index 806ff5910..b5d1da7f2 100644
--- a/src/target/cortex_m.h
+++ b/src/target/cortex_m.h
@@ -56,6 +56,8 @@ enum cortex_m_impl_part {
 	CORTEX_M33_PARTNO  = ARM_MAKE_CPUID(ARM_IMPLEMENTOR_ARM, 0xD21),
 	CORTEX_M35P_PARTNO = ARM_MAKE_CPUID(ARM_IMPLEMENTOR_ARM, 0xD31),
 	CORTEX_M55_PARTNO  = ARM_MAKE_CPUID(ARM_IMPLEMENTOR_ARM, 0xD22),
+	REALTEK_M200_PARTNO = ARM_MAKE_CPUID(ARM_IMPLEMENTOR_REALTEK, 0xd20),
+	REALTEK_M300_PARTNO = ARM_MAKE_CPUID(ARM_IMPLEMENTOR_REALTEK, 0xd22),
 };
 
 /* Relevant Cortex-M flags, used in struct cortex_m_part_info.flags */