3069RF-ZTAT Datasheet, PDF (669/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

One-Byte Command
or One-Byte Response
n-Byte Command or
n-Byte Response
Command or Response
Data
Size
Command or Response
Checksum
Error Response
Error Code
Error Response
128-Byte Programming
Address
Command
Data (n bytes)
Checksum
Memory Read
Response
Size
Response
Data
Checksum
Figure 18.25 Communication Protocol Format
 Command (1 byte) : Commands including inquiries, selection, programming, erasing, and
checking
 Response (1 byte) : Response to an inquiry
 Size (1 byte) : The amount of data for transmission excluding the command, amount of
data, and checksum
 Checksum (1 byte) : The checksum is calculated so that the total of all values from the
command byte to the SUM byte becomes H'00.
 Data (n bytes) : Detailed data of a command or response
 Error Response (1 byte) : Error response to a command
 Error Code (1 byte) : Type of the error
 Address (4 bytes) : Address for programming
 Data (n bytes) : Data to be programmed (the size is indicated in the response to the
programming unit inquiry.)
 Size (4 bytes) : Four-byte response to a memory read
Rev. 5.0, 09/04, page 647 of 978