H8SXSLASH1663M datasheet(1146/1504 Pages) RENESAS

1146 / 1504 page

Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1114 of 1468

REJ09B0412-0200

25.5

Programming/Erasing Interface

Programming/erasure of the flash memory is done by downloading an on-chip programming/

erasing program to the on-chip RAM and specifying the start address of the programming

destination, the program data, and the erase block number using the programming/erasing

interface registers and programming/erasing interface parameters.

The procedure program for user program mode and user boot mode is made by the user. Figure

25.5 shows the procedure for creating the procedure program. For details, see section 25.8.3, User

Program Mode.

Download on-chip program

by setting VBR, FKEY, and

SCO bit in FCCS

Yes

Execute initialization

(downloaded program execution)

Select on-chip program

to be downloaded and

specify destination

Programming (in 128-byte units)

or erasing (in 1-block units)

(downloaded program execution)

Start procedure program for

programming/erasing

End procedure program

Programming/erasing

completed?

Figure 25.5 Procedure for Creating Procedure Program

(1)

Selection of On-Chip Program to be Downloaded

This LSI has programming/erasing programs which can be downloaded to the on-chip RAM. The

on-chip program to be downloaded is selected by the programming/erasing interface registers. The

start address of the on-chip RAM where an on-chip program is downloaded is specified by the

flash transfer destination address register (FTDAR).

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