Datasheet

Section 17 ROM
Rev.7.00 Feb. 14, 2007 page 757 of 1108
REJ09B0089-0700
Command or Response
Size
Data
Checksum
Error Response
Error Code
Command or Response
Error Response
n-Byte Command or
n-Byte Response
One-Byte Command
or One-Byte Response
Address
Command
Data (n bytes)
Checksum
128-Byte Programming
Size
Response
Data
Checksum
Memory Read
Response
Figure 17.84 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