RA6963 datasheet(20/46 Pages) RAIO

20 / 46 page

Preliminary Version 1.3

Dot Matrix LCD Controller

RAiO TECHNOLOGY INC.

www.raio.com.tw

20/46

RA6963

6-7 Set Control Word

< Table 6-7 >

Code

Hex.

Function

01000000

40h

Set Text Home Address

Low Address High Address

01000001

41h

Set Text Area

Columns

00h

01000010

42h

Set Graphic Home Address

Low Address High Address

01000011

43h

Set Graphic Area

Columns

00h

The home address and column size are defined by this command.

6-7-1 Set Text Home Address

The starting address in the external display RAM for text display is defined by this command.

The text home address indicates the leftmost and uppermost position.

The Relationship between Display RAM Address and Display Position

< Table 6-8 >

………

TH + CL

TH + TA

………

TH + TA + CL

(TH + TA) + TA

………

TH + 2TA + CL

(TH + 2TA) + TA

………

TH + 3TA + CL

TH + (n-1) TA

………

TH + (n-1) TA + CL

TH: Text home address

TA: Text area number (columns)

CL: Columns are fixed by hardware (pin-programmable).

(Example)

Text Home Address

Text Area

MD2=H, MD3=H

DUAL

=H, MDS=L, MD0=L, MD1=H

: 0000h

: 0020h

: 32 Columns

: 4 Lines

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