diff --git a/ion/src/device/n0100/drivers/config/exam_mode.h b/ion/src/device/n0100/drivers/config/exam_mode.h
index 2988f6a09..7dfcd5517 100644
--- a/ion/src/device/n0100/drivers/config/exam_mode.h
+++ b/ion/src/device/n0100/drivers/config/exam_mode.h
@@ -5,6 +5,8 @@ namespace Ion {
 namespace ExamMode {
 namespace Config {
 
+// TODO: factorize the macro with equivalent macro on N110
+
 #define byte4 0xFF, 0xFF, 0xFF, 0xFF
 #define byte8 byte4, byte4
 #define byte16 byte8, byte8
diff --git a/ion/src/device/n0110/drivers/config/exam_mode.h b/ion/src/device/n0110/drivers/config/exam_mode.h
index 1949c9ccc..e2a2e2aba 100644
--- a/ion/src/device/n0110/drivers/config/exam_mode.h
+++ b/ion/src/device/n0110/drivers/config/exam_mode.h
@@ -5,6 +5,8 @@ namespace Ion {
 namespace ExamMode {
 namespace Config {
 
+// TODO: factorize the macro with equivalent macro on N100
+
 #define byte4 0xFF, 0xFF, 0xFF, 0xFF
 #define byte8 byte4, byte4
 #define byte16 byte8, byte8