H8SXSLASH1663 datasheet(985/1158 Pages) RENESAS

985 / 1158 page

Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 933 of 1102

REJ09B0294-0100

5. Memory read response

This response consists of four bytes of data.

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 21.22 Communication Protocol Format

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

checking

• Response (one byte): Response to an inquiry

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

and checksum

• 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.

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

• 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.)

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

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