3069RF-ZTAT Datasheet, PDF (689/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

• User-Program Sum check
The boot program will return the byte-by-byte total of the contents of the bytes of the user
program.
Command H'4B
 Command, H'4B, (1 byte) : Sum check for user program
Response H'5B Size
Checksum of user program
SUM
 Response, H'5B, (1 byte) : Response to the sum check of the user program
 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
• User Boot MAT Blank check
The boot program will check whether or not all user boot MATs are blank and return the result.
Command H'4C
 Command, H'4C, (1 byte) : Blank check for user boot MAT
Response H'06
 Response, H'06, (1 byte) : Response to the blank check of user boot MAT
If all user MATs are blank (H'FF), the boot program will return ACK.
Error
response H'CC
H'52
 Error Response, H'CC, (1 byte) : Response to blank check for user boot MAT
 Error Code, H'52, (1 byte) : Erasure has not been completed.
• User MAT Blank Check
The boot program will check whether or not all user MATs are blank and return the result.
Command H'4D
 Command, H'4D, (1 byte) : Blank check for user MATs
Response H'06
 Response, H'06, (1 byte) : Response to the blank check for user boot MATs
If the contents of all user MATs are blank (H'FF), the boot program will return ACK.
Rev. 5.0, 09/04, page 667 of 978