HD64F3437TF16 Datasheet, PDF(497/752 Page) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

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HD64F3437TF16 Datasheet, PDF (497/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

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Notes: 1. In this sample program, the stack pointer (SP) is set at address FF80. As the stack area,

on-chip RAM addresses FF7E and FF7F are used. Therefore, when executing this

sample program, addresses FF7E and FF7F should not be used. In addition, the on-chip

RAM should not be disabled.

2. In this sample program, the program written in a ROM area (including external space)

is transferred into the RAM area and executed in the RAM to which the program is

transferred. #RAMSTR in the program is the starting destination address in RAM to

which the program is transferred. #RAMSTR must be set to an even number.

3. When executing this sample program in the on-chip ROM area or external space,

#RAMSTR should be set to #START.

FLMCR:

EBR1:

EBR2:

TCSR:

STACK:

.RQU

.EQU

.EQU

.EQU

.EQU

H'FF80

H'FF82

H'FF83

H'FFA8

H'FF80

.ALIGN 2

START: MOV.W

#STACK, SP

; Set stack pointer

; Set the bits in R0 following the description on the previous page. This program is a sample program to erase

; all blocks.

MOV.W

#H'FFFF, R0

; Select blocks to be erased (R0: EBR1/EBR2)

MOV.W

R0,

@EBR1 ; Set EBR1/EBR2

; #RAMSTR is starting destination address to which program is transferred in RAM.

; Set #RAMSTR to even number.

MOV.W

#RAMSTR, R2

; Starting transfer destination address (RAM)

MOV.W

#ERVADR, R3

;

ADD.W

R3,

R2

; #RAMSTR + #ERVADR â R2

MOV.W

#START, R3

;

SUB.W

R3,

R2

; Address of data area used in RAM

PRETST:

EBR2PW:

PWADD1:

MOV.B

CMP.B

BEQ

CMP.B

BMI

MOV.B

SUBX

BTST

BNE

BRA

BTST

BNE

INC

MOV.W

BRA

#H'00, R1L

#H'10, R1L

ERASES

#H'08, R1L

EBR2PW

R1L,

R1H

#H'08, R1H

R1H,

R0H

PREWRT

PWADD1

R1L,

R0L

PREWRT

R1L

@R2+,

R3

PRETST

: Used to test R1L bit in R0

; R1L = H'10?

; If finished checking all R0 bits, branch to ERASES

;

; Test EBR1 if R1L â¥ 8, or EBR2 if R1L < 8

;

; R1L â 8 â R1H

; Test R1H bit in EBR1 (R0H)

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

; If R1H bit in EBR1 (R0H) is 0, branch to PWADD1

; Test R1L bit in EBR2 (R0L)

; If R1L bit in EBR2 (R0H) is 1, branch to PREWRT

; R1L + 1 â R1L

; Dummy-increment R2

;

468

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