HD64F2168 Datasheet, PDF (732/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

• ERROR: (1 byte): Error code
H'11: Sum check error
H'2A: Address error
The read address is not in the MAT.
H'2B: Size error
The read size exceeds the MAT.
(12) User Boot MAT Sum Check
The boot program will return the byte-by-byte total of the contents of the bytes of the user boot
MAT, as a 4-byte value.
Command H'4A
• Command, H'4A, (1 byte): Sum check for user-boot MAT
Response H'5A Size Checksum of user boot program SUM
• Response, H'5A, (1 byte): Response to the sum check of user-boot MAT
• Size (1 byte): The number of bytes that represents the checksum
This is fixed to 4.
• Checksum of user boot program (4 bytes): Checksum of user boot MATs
The total of the data is obtained in byte units.
• SUM (1 byte): Sum check for data being transmitted
(13) User MAT Sum Check
The boot program will return the byte-by-byte total of the contents of the bytes of the user MAT.
Command H'4B
• Command, H'4B, (1 byte): Sum check for user MAT
Response H'5B Size Checksum of user program SUM
• Response, H'5B, (1 byte): Response to the sum check of the user MAT
• Size (1 byte): The number of bytes that represents the checksum
This is fixed to 4.
• Checksum of user boot program (4 bytes): Checksum of user MATs
The total of the data is obtained in byte units.
• SUM (1 byte): Sum check for data being transmitted
(14) User Boot MAT Blank Check
The boot program will check whether or not all user boot MATs are blank and return the result.
Rev. 3.00, 03/04, page 692 of 830