Renesas H8S/2437 Hardware Manual page 642

• Read address (four bytes): Start address to be read from
• Read size (four bytes): Size of data to be read
• SUM (one byte): Checksum
Response H'52
Data
SUM
• Response: H'52 (one byte): Response to memory read
• Read size (four bytes): Size of data to be read
• Data (n bytes): Data for the read size from the read address
• SUM (one byte): Checksum
Error Response H'D2
• Error response: H'D2 (one byte): Error response to memory read
• ERROR: (one byte): Error code
H'11: Checksum 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 four-byte value.
Command H'4A
• Command, H'4A, (one byte): Sum check for user boot MAT
Response H'5A
• Response, H'5A, (one byte): Response to the sum check of user boot MAT
• Size (one byte): The number of bytes that represents the checksum
This is fixed to 4.
• Checksum of MATs (four bytes): Checksum of user boot MATs
The total of the data is obtained in byte units.
• SUM (one 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,
as a four-byte value.
Rev. 1.00, 09/03, page 604 of 704
Read size
···
ERROR
Size Checksum of MATs SUM