H8SXSLASH1663M datasheet(1190/1504 Pages) RENESAS

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Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1158 of 1468

REJ09B0412-0200

(2)

User MAT Programming in User Boot Mode

Figure 25.16 shows the procedure for programming the user MAT in user boot mode.

The difference between the programming procedures in user program mode and user boot mode is

the memory MAT switching as shown in figure 25.16. For programming the user MAT in user

boot mode, additional processing made by setting FMATS is required: switching from the user

boot MAT to the user MAT, and switching back to the user boot MAT after programming

completes.

Set FKEY to H'A5

DPFR

= 0 ?

Yes

Download error processing

Set the FPEFEQ parameter

Initialization

JSR FTDAR setting

+ 32

Yes

End programming

procedure program

FPFR

= 0 ?

Initialization error processing

Disable interrupts

and bus master operation

other than CPU

Clear FKEY to 0

Set parameter to ER0 and

ER1 (FMPAR and FMPDR)

Programming

JSR FTDAR setting

+ 16

Yes

FPFR

= 0 ?

Yes

Required data

programming is

completed?

Set FKEY to H'A5

Clear FKEY to 0

MAT

switchover

MAT

switchover

Set FMATS to value other than

H'AA to select user MAT

Set SCO to 1 after initializing

VBR and execute download

Clear FKEY and programming

error processing

Set FMATS to H'AA to

select user boot MAT

User-boot-MAT

selection state

Note: The MAT must be switched by FMATS to perform the programming error processing in the user boot MAT.

Start programming

procedure program

Select on-chip program

to be downloaded and

specify download

destination by FTDAR

Figure 25.16 Procedure for Programming User MAT in User Boot Mode

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