H8SXSLASH1663 datasheet(998/1158 Pages) RENESAS

998 / 1158 page

Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 946 of 1102

REJ09B0294-0100

(8) Programming/Erasing State

A programming selection command makes the boot program select the programming method, a

128-byte programming command makes it program the memory with data, and an erasing

selection command and block erasing command make it erase the block. Table 21.15 lists the

programming/erasing commands.

Table 21.15 Programming/Erasing Commands

Command

Command Name

Description

H'43

User MAT programming selection

Transfers the user MAT programming program

H'50

128-byte programming

Programs 128 bytes of data

H'48

Erasing selection

Transfers the erasing program

H'58

Block erasing

Erases a block of data

H'52

Memory read

Reads the contents of memory

H'4B

User MAT sum check

Checks the checksum of the user MAT

H'4D

User MAT blank check

Checks the blank data of the user MAT

H'4F

Boot program status inquiry

Inquires into the boot program's status

• Programming

Programming is executed by the programming selection and 128-byte programming

commands.

Firstly, the host should send the programming selection command

After issuing the programming selection command, the host should send the 128-byte

programming command. The 128-byte programming command that follows the selection

command represents the data programmed according to the method specified by the selection

command. When more than 128-byte data is programmed, 128-byte commands should

repeatedly be executed. Sending a 128-byte programming command with H'FFFFFFFF as the

address will stop the programming. On completion of programming, the boot program will

wait for selection of programming or erasing.

Where the sequence of programming operations that is executed includes programming with

another method or of another MAT, the procedure must be repeated from the programming

selection command.

The sequence for the programming selection and 128-byte programming commands is shown

in figure 21.24.

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