HD6433644R datasheet(150/549 Pages) RENESAS

150 / 549 page

Section 6 ROM

Rev. 6.00 Sep 12, 2006 page 130 of 526

REJ09B0326-0600

Sample Program for Programming One Byte

This program uses the following registers:

R0H: Used for erase block specification.

R1H: Stores programming data.

R1L: Stores read data.

R3:

Stores the programming address. Valid address specifications are H'0000 to H'EF7F.

R4:

Used for program and program-verify loop counter value setting. Also stores register set

values.

R5:

Used for program loop counter value setting.

R6L: Used for the program-verify fail count.

Arbitrary data can be programmed at an arbitrary address by setting the R3 (programming address)

and R1H (programming data) values.

The values of #a and #b depend on the operating frequency. They should be set as indicated in

table 6.11.

FLMCR: .EQU

H'FF80

EBR1:

.EQU

H'FF82

EBR2:

.EQU

H'FF83

TCSRW: .EQU

H'FFBE

TCW:

.EQU

H'FFBF

.ALIGN 2

PRGM:

MOV.B

#H'**, R0H

;

MOV.B

R0H,

@EBR*:8

;

Set EBR*

MOV.B

#H'00, R6L

;

Program-verify fail count

MOV.W

#H'a,

;

Set program loop counter

MOV.B

R1H,

@R3

;

Dummy write

PRGMS: INC R6L

;

Program-verify fail counter + 1

→ R6L

MOV.W

#H'FE5A, R4

;

MOV.B

R4L,

@TCSRW:8 ;

MOV.B

R4H,

@TCW:8

;

MOV.B

#H'36, R4L

;

MOV.B

R4L,

@TCSRW:8 ;

Start watchdog timer

MOV.W

R5,

;

Set program loop counter

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