TOPWAY

LCD Module User Manual

LM3033CDW-0B

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Document Name: LM3033CDW-0B-Manual-Rev0.1.DOC

Page: 12 of 13

4.5.2 Extended Instruction Set

RE=1, extended instruction set

Code

Instructions

Function

SCROLL or

RAM ADDR

SELECT

0

0

0

0

0

0

0

0

1

SR

SR=1, enable vertical scroll position

SR=0, enable CGRAM address (basic instruction)

REVERSE

0

0

0

0

0

0

0

1

R1 R0

Toggle 1 out of 4 line (in DDRAM) of the display to

be reversed (initial value is R1 ,R0 = 0, 0

EXTENDED

FUNCTION

SET

0

0

0

0

1

DL

X

RE G

0

DL=1, 8bit interface

DL=0, 4bit interface

RE=1, extended instruction

RE=0; basic instruction

G=1, graphics display ON

G=0, graphics display OFF

SET

SCROLL

ADDR

0

0

0

1 AC5 AC4 AC3 AC2 AC1 AC0

Set the address of vertical scroll

Make sure extended instruction SR=1, enable

vertical scroll position.

0

0

1 AC6 AC5 AC4 AC3 AC2 AC1 AC0

SET

GRAPHICS

RAM ADDR

0

0

1

0

0

0 AC3 AC2 AC1 AC0

Set the GDRAM address to address counter (AC)

Dual byte command should write consecutively

First byte set the Vertical address AC6~AC0

Second byte set the Horizontal address AC3~AC0

Note:

*1. For the details of the Display Control Instructions, please refer to Sitronix ST7920 series datasheet.

*2. RE is the selection byte of basic and extended instruction set. Each time altering the value of RE, it will remain. Thus, it is not

necessary to set RE every time when using the same group of instruction set