H8SXSLASH1663 datasheet(944/1158 Pages) RENESAS

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Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 892 of 1102

REJ09B0294-0100

Initialization before Programming/Erasing: The on-chip program includes the initialization

program. A pulse with the specified period must be applied when programming or erasing. The

specified pulse width is made by the method in which wait loop is configured by the CPU

instruction. Accordingly, the operating frequency of the CPU must be set. The initial program is

set as a parameter of the programming/erasing program which has been downloaded to perform

these settings.

Programming: When the flash memory is programmed, the start address of the programming

destination on the user MAT and the program data must be passed to the programming program.

The start address of the programming destination on the user MAT must be stored in general

The program data is always in 128-byte units. When the program data does not satisfy 128 bytes,

128-byte program data is prepared by filling the dummy code (H'FF). The boundary of the start

address of the programming destination on the user MAT is aligned at an address where the lower

eight bits (A7 to A0) are H'00 or H'80.

The program data for the user MAT must be prepared in consecutive areas. The program data

must be in a consecutive space which can be accessed using the MOV.B instruction of the CPU

and is not in the flash memory space.

The start address of the area that stores the data to be written in the user MAT must be set in

general register ER0. This parameter is called the flash multipurpose data destination area

parameter (FMPDR).

For details on the programming procedure, see section 21.7.3, User Program Mode.

Erasure: When the flash memory is erased, the erase block number on the user MAT must be

passed to the erasing program which is downloaded.

The erase block number on the user MAT must be set in general register ER0. This parameter is

called the flash erase block select parameter (FEBS).

One block is selected from the block numbers of 0 to 13 as the erase block number.

For details on the erasing procedure, see section 21.7.3, User Program Mode.

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