diff --git a/pyocd/target/builtin/target_nRF54LM20A.py b/pyocd/target/builtin/target_nRF54LM20A.py
index f284ac625..71d0b1e69 100644
--- a/pyocd/target/builtin/target_nRF54LM20A.py
+++ b/pyocd/target/builtin/target_nRF54LM20A.py
@@ -21,35 +21,36 @@
 
     # Flash algorithm as a hex string
     'instructions': [
-    0xe7fdbe00,
-    0x68134a02, 0xd1fc2b01, 0x46c04770, 0x5004e400, 0x47702000, 0x47702000, 0x2501b570, 0x60254c05,
-    0xffeef7ff, 0x601d4b04, 0xffeaf7ff, 0x60202000, 0x46c0bd70, 0x5004e500, 0x5004e540, 0xb5702301,
-    0x00044d06, 0xf7ff602b, 0x2301ffdb, 0x6023425b, 0xffd6f7ff, 0x60282000, 0x46c0bd70, 0x5004e500,
-    0x2301b5f8, 0x000f0014, 0x00064d0a, 0xf7ff602b, 0x0022ffc7, 0x00bf08bf, 0x1b3619e7, 0x42ba1993,
-    0xf7ffd104, 0x2000ffbd, 0xbdf86028, 0x6019ca02, 0x46c0e7f4, 0x5004e500, 0x00000000, 0x00000000
+        0xe7fdbe00,
+        0xf8d24a02, 0x07db3400, 0x4770d5fb, 0x5004e000, 0xf7ffb508, 0x2000fff5, 0x2000bd08, 0x00004770,
+        0x49072001, 0xf8c1b508, 0xf7ff0500, 0xf8c1ffe9, 0x20000540, 0xffe4f7ff, 0x0500f8c1, 0xbf00bd08,
+        0x5004e000, 0xf242b508, 0x49080301, 0x3500f8c1, 0xffd6f7ff, 0x33fff04f, 0x23016003, 0x608b2000,
+        0xffcef7ff, 0x0500f8c1, 0xbf00bd08, 0x5004e000, 0xf242b538, 0x46140301, 0xf0214d0c, 0xf8c50103,
+        0xf7ff3500, 0x4622ffbd, 0x1b004421, 0xeb02428a, 0xd1070300, 0x20002301, 0xf7ff60ab, 0xf8c5ffb1,
+        0xbd380500, 0x4b04f852, 0xe7ef601c, 0x5004e000,
     ],
 
     # Relative function addresses
     'pc_init': 0x20000015,
-    'pc_unInit': 0x20000019,
-    'pc_program_page': 0x20000065,
-    'pc_erase_sector': 0x20000041,
-    'pc_eraseAll': 0x2000001d,
+    'pc_unInit': 0x2000001f,
+    'pc_program_page': 0x20000075,
+    'pc_erase_sector': 0x20000049,
+    'pc_eraseAll': 0x20000025,
 
-    'static_base' : 0x20000000 + 0x00000004 + 0x000000a0,
-    'begin_stack' : 0x20000300,
-    'page_size' : 0x4,
+    'static_base' : 0x200000B8,
+    'begin_stack' : 0x20003000,
+    'page_size' : 0x1000,
     'analyzer_supported' : False,
     'analyzer_address' : 0x00000000,
-    'page_buffers' : [0x200000b0,0x200000b4],   # Enable double buffering
+    'page_buffers' : [0x20000100,0x20001100],   # 4 KiB double buffers, 128-bit line aligned
     'min_program_length' : 0x4,
 
     # Relative region addresses and sizes
-    'ro_start': 0x4,
-    'ro_size': 0xa0,
-    'rw_start': 0xa4,
+    'ro_start': 0xb4,
+    'ro_size': 0x0,
+    'rw_start': 0xb4,
     'rw_size': 0x0,
-    'zi_start': 0xa4,
+    'zi_start': 0xb4,
     'zi_size': 0x0,
 
     # Flash information