Index: firmware/App/Common.h
===================================================================
diff -u -r5a58fd72ededee8a718098b53448a2c921c57f49 -r5645305f9349c5c64be5560982bdf1abd5edb0fb
--- firmware/App/Common.h	(.../Common.h)	(revision 5a58fd72ededee8a718098b53448a2c921c57f49)
+++ firmware/App/Common.h	(.../Common.h)	(revision 5645305f9349c5c64be5560982bdf1abd5edb0fb)
@@ -17,7 +17,8 @@
 #define NUM_OF_FW_STACKS                      2                                                         ///< Number of firmware stacks (TD, DD).
 #define FW_STACKS_RCV_MAIL_BOX_INDEX          0                                                         ///< Firmware stacks table receive mail box index.
 #define FW_STACKS_RESP_MAIL_BOX_INDEX         1                                                         ///< Firmware stacks table response mail box index.
-#define CAN_MESSAGE_FRAME_SIZE                8                                                         ///< CAN message frame size in bytes.
+#define CAN_MESSAGE_FRAME_SIZE_BYTES          8                                                         ///< CAN message frame size in bytes.
+#define CAN_MESSAGE_FRAME_NIBBLE_BYTES        4                                                         ///< CAN message frame nibble in bytes.
 #define FIRMWARE_START_ADDRESS                0x00010000                                                ///< Firmware start address.
 #define FIRMWARE_CRC_TABLE_ADDRESS            0x10020                                                   ///< The starting address of CRC table for firmware image.
 #define SW_UPDATE_FLASH_BUFFER_SIZE           256                                                       ///< Software update flash buffer bytes.
@@ -100,7 +101,8 @@
     SW_UPDATE_TD_UPDATE,        // 0x603                                                                ///< Software update TD update mailbox.
     SW_UPDATE_DD_RESP,          // 0x604                                                                ///< Software update DD respond mailbox.
     SW_UPDATE_DD_UPDATE,        // 0x605                                                                ///< Software update DD update mailbox.
-    SW_UPDATE_TD_BROADCAST,     // 0x606                                                                ///< Software update TD broadcast mailbox.
+    SW_UPDATE_FFU_BROADCAST,    // 0x606                                                                ///< Software update Firmware FPGA Updater (FFU) broadcast mailbox.
+    SW_UPDATE_TD_BROADCAST,     // 0x607                                                                ///< Software update TD broadcast mailbox.
     NUM_OF_SW_UPDATE_MBOXES,                                                                            ///< Number of software update mailboxes.
 } SW_UPDATE_CAN_MAIL_BOX_T;