UPD17062 datasheet(271/298 Pages) RENESAS

271 / 298 page

269

µPD17062

The sample program follows:

Program start

; Performs initialization such as clearing RAM.

Initialization

SET1

IDCDMAEN

; Selects the DMA mode.

CLR1

IDCEN

; Turns off the display.

;

; ** Channel display routine **

;

CLR1

CROMBNK

; Sets the CROM bank to 0.

;

MOV

VRAM0, #1000B

; Specifies control code 1.

MOV

VRAM1, #0000B

;

MOV

VRAM2, #0

; Specifies display character data C.

MOV

VRAM3, #0CH

;

MOV

VRAM4, #0

; Specifies display character data H.

MOV

VRAM5, #0DH

;

MOV

VRAM6, #1000B

; Specifies control code 2.

MOV

VRAM7, #0001B

;

MOV

VRAM8, #0

; Specifies display character data 0.

MOV

VRAM9, #0

;

MOV

VRAMA, #0

; Specifies display character data 2.

MOV

VRAMB, #2

;

MOV

VRAMC, #0100B

; CR (carriage return)

MOV

VRAMD, #0000B

;

MOV

VRAME, #0100B

; CR (carriage return)

MOV

VRAMF, #0000B

;

LOOP:

SKF1

INTVSYN

; Make sure Vsync = low level and turns on the display.

LOOP

SET1

IDCEN

; Turns on the display

UPD17062 Datasheet(PDF) 271 Page - Renesas Technology Corp

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