HD6433644R datasheet(164/549 Pages) RENESAS

164 / 549 page

Section 6 ROM

Rev. 6.00 Sep 12, 2006 page 144 of 526

REJ09B0326-0600

EVR2:

MOV.B

#H'FF,

R1H

;

MOV.B

R1H,

@R3

;

Dummy write

MOV.B

#H'c,

R4H

;

Set erase-verify loop counter

LOOPEP:

DEC

R4H

;

BNE

LOOPEP

;

Wait loop

MOV.B

@R3+,

R1H

;

Read

CMP.B

#H'FF,

R1H

;

Read data = H'FF?

BNE

BLKAD

;

If read data ≠ H'FF, branch to BLKAD

MOV.W

@R2,

;

Start address of next block

CMP.W

R4,

;

Last address in block?

BNE

EVR2

;

CMP.B

#H'08,

R1L

;

BMI

SBCLR

;

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

MOV.B

R1L,

R1H

;

SUBX

#H'08,

R1H

;

R1L – 8

→ R1H

BCLR

R1H,

R0H

;

Clear bit R1H in EBR1 (R0H)

BRA

BLKAD

;

SBCLR:

BCLR

R1L,

R0L

;

Clear bit R1L in EBR2 (R0L)

BLKAD:

INC

R1L

;

R1L + 1

→ R1L

BRA

EBRTST

;

HANTEI:

BCLR

#3,

@FLMCR:8 ;

Clear EV bit

MOV.B

R0H,

@EBR1:8

;

MOV.B

R0L,

@EBR2:8

;

MOV.W

R0,

;

BEQ

EOWARI

;

If EBR1/EBR2 = all 0s, normal end of erase

MOV.W

#H'0004,

;

CMP.W

R4,

;

Erase-verify fail count = 4?

BPL

BRER

;

If R6 ≥ 4. branch to BRER (branch until R6 = 4 – 602)

ADD.W

R5,

;

If R6 < 4, double erase time (executed only for R6 = 1, 2, 3)

BRER:

MOV.W

#H'025A,

;

CMP.W

R4,

;

Erase-verify executed 602 times?

BNE

ERASE1

;

If erase-verify not executed 602 times, erase again

BRA

ABEND2

;

If erase-verify executed 602 times, branch to ABEND2

;****

< Block address table used in erase-verify > ****

.ALIGN

ERVADR:

.DATA.W

H'0000

; SB0

.DATA.W

H'0080

; SB1

.DATA.W

H'0100

; SB2

.DATA.W

H'0180

; SB3

.DATA.W

H'0200

; SB4

.DATA.W

H'0400

; SB5

.DATA.W

H'0800

; SB6

.DATA.W

H'0C00

; SB7

.DATA.W

H'1000

; LB0

HD6433644R Datasheet(PDF) 164 Page - Renesas Technology Corp

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