Renesas H8S/2100 Series Hardware Manual page 799

6-bit single-chip microcomputer

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4. Programming of 128 bytes

The size is not specified in commands. The size of n is indicated in response to the

programming unit inquiry.

5. Memory read response

This response consists of four bytes of data.

One-byte command

or one-byte response

n-byte command or

n-byte response

Error response

128-byte programming

• Command (one byte): Commands including inquiries, selection, programming, erasing, and

• Response (one byte): Response to an inquiry

• Size (one byte): The amount of data for transmission excluding the command, amount of data,

and checksum

• Data (n bytes): Detailed data of a command or response

• Checksum (one byte): The checksum is calculated so that the total of all values from the

command byte to the SUM byte becomes H'00.

• Error response (one byte): Error response to a command

• Error code (one byte): Type of the error

• Address (four bytes): Address for programming

• Data (n bytes): Data to be programmed (the size is indicated in the response to the

programming unit inquiry.)

• Data Size (four bytes): Four-byte response to a memory read

Command or response

Command or response

Error response

Data (n bytes)

Figure 24.20 Communication Protocol Format

Section 24 Flash Memory

Rev. 1.00 May 09, 2008 Page 773 of 954

REJ09B0462-0100