SH7080_09 Datasheet, PDF (1370/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 23 Flash Memory
• Sum checking of the user boot MAT
In response to the command for sum checking of the user boot MAT, the boot program adds all
bytes of data in the user boot MAT and returns the result.
Command H'4A
⎯ Command H'4A (1 byte): Sum checking of the user boot MAT
Response
H'5A
Size
Checksum for the MAT
SUM
⎯ Response H'5A (1 byte): Response to sum checking of the user boot MAT
⎯ Size (1 byte): The number of characters in the checksum for the MAT (fixed at 4)
⎯ Checksum for the MAT (4 bytes): Result of checksum calculation for the user boot MAT:
the total of all data in the MAT, in byte units.
⎯ SUM (1 byte): Checksum (for the transmitted data)
• Sum checking of the user MAT
In response to the command for sum checking of the user MAT, the boot program adds all bytes of
data in the user MAT and returns the result.
Command H'4B
⎯ Command H'4B (1 byte): Sum checking of the user MAT
Response
H'5B
Size
Checksum for the MAT
SUM
⎯ Response H'5B (1 byte): Response to sum checking of the user MAT
⎯ Size (1 byte): The number of characters in the checksum for the MAT (fixed at 4)
⎯ Checksum for the MAT (4 bytes): Result of checksum calculation for the user MAT:
the total of all data in the MAT, in byte units.
⎯ SUM (1 byte): Checksum (for the transmitted data)
Rev. 4.00 Dec. 15, 2009 Page 1310 of 1558
REJ09B0181-0400