R5F72115D160FPV datasheet(976/1228 Pages) RENESAS

976 / 1228 page

Section 21 Flash Memory

Rev. 2.00 May. 08, 2008 Page 952 of 1200

REJ09B0344-0200

Command or response

Data

Data (n bytes)

Address

Size

Checksum

Command or response

Command

Error code

Error response

Checksum

Data

Data size

Response

Checksum

One-character command

or one-character response

n-character command

or n-character response

Error response

256-byte

programming command

Response to

memory read command

Figure 21.21 Formats in the Communications Protocol

• Command (1 byte): Inquiry, selection, programming, erasure, checking, etc.

• Response (1 byte): Response to an inquiry

• Size (one or two bytes): The length of data for transfer, excluding the command/response, size,

and checksum.

• Data (n bytes): Particular data for the command or response

• Checksum (1 byte): Set so that the total sum of byte values from the command code to the

checksum is H'00.

• Error response (1 byte): Error response to a command

• Error code (1 byte): Indicates the type of error.

• Address (4 bytes): Address for programming

• Data (n bytes): Data to be programmed. "n" is known from the response to the command used

to inquire about the programming size.

• Data size (4 bytes): Four-byte field included in the response to a memory reading command.

R5F72115D160FPV Datasheet(PDF) 976 Page - Renesas Technology Corp