H8SXSLASH1663 datasheet(933/1158 Pages) RENESAS

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Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 881 of 1102

REJ09B0294-0100

21.4

Programming/Erasing Interface

Programming/erasing 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 is made by the user. Figure 21.5 shows the

procedure for creating the procedure program. For details, see section 21.7.3, 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 21.5 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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