HD6433644R datasheet(163/549 Pages) RENESAS

163 / 549 page

Section 6 ROM

Rev. 6.00 Sep 12, 2006 page 143 of 526

REJ09B0326-0600

MOV.W

#H'e5A,

;

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 erase loop counter

BSET

#1,

@FLMCR:8 ;

Set E bit

LOOPE:

NOP

SUBS

#1,

;

MOV.W

R4,

;

BNE

LOOPE

;

Wait loop

BCLR

#1,

@FLMCR:8 ;

Clear E bit

MOV.B

#H'50,

R4L

;

MOV.B

R4L,

@TCSRW:8 ;

Stop watchdog timer

;

Execute erase-verify

EVR:

MOV.W

#RAMSTR, R2

;

Transfer destination start address (RAM)

MOV.W

#ERVADR, R3

;

ADD.W

R3,

;

#RAMSTR + #ERVADR

→ R2

MOV.W

#START,

;

SUB.W

R3,

;

Address of data area used in RAM

MOV.B

#H'00,

R1L

;

Used to test bit R1L in R0

MOV.B

#H'b,

R4H

;

Set erase-verify loop counter

BSET

#3,

@FLMCR:8 ;

Set EV bit

LOOPEV:

DEC

R4H

;

BNE

LOOPEV

;

Wait loop

EBRTST:

CMP.B

#H'0C,

R1L

;

R1L = H'0C?

BEQ

HANTEI

;

If finished checking all R0 bits, branch to HANTEI

CMP.B

#H'08,

R1L

;

BMI

EBR2EV

;

If R1L ≥ 8, EBR1 test; if R1L < 8, EBR2 test

MOV.B

R1L,

R1H

;

SUBX

#H'08,

R1H

;

R1L – 8

→ R1H

BTST

R1H,

R0H

;

Test bit R1H in EBR1 (R0H)

BNE

ERSEVF

;

If bit R1H in EBR1 (R0H) is 1, branch to ERSEVF

BRA

ADD01

;

If bit R1H in EBR1 (R0H) is 0, branch to ADD01

EBR2EV:

BTST

R1L,

R0L

;

Test bit R1L in EBR2 (R0L)

BNE

ERSEVF

;

If bit R1L in EBR2 (R0L) is 1, branch to ERSEVF

ADD01:

INC

R1L

;

R1L + 1

→ R1L

MOV.W

@R2+,

;

Dummy-increment R2

BRA

EBRTST

;

ERASE1:

BRA

ERASE

;

Branch to ERASE via ERASE1

ERSEVF:

MOV.W

@R2+,

;

Start address of block to be erase-verified

HD6433644R Datasheet(PDF) 163 Page - Renesas Technology Corp

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