TOPWAY

LCD Module User Manual

LMB202ADC

www.topwaysz.com

Document Name: LMB202ADC-Manual-Rev0.1.DOC

Page: 8 of 11

4.4

Display Memory Map

There are two main memory-areas in the LCD module for display.

-

Character Generator RAM (CGRAM)

-

Display Data RAM (DDRAM)

4.4.1 Character Generator RAM (CGRAM)

Character Generator RAM is for storing the User-defined Characters (5x8 dots font).

Totally 8 User-defined Characters (character code = 00h ~ 07h) could be created.

The User-defined Character Codes are 00h and 07h. They could be called into DDRAM as normal

character.

CGRAM Data (Font Pattern)

User-defined

Character

Code

CGRAM

Address

D7 ~ D5

D4

~

D0

00h

(08h)

00h

01h

:

06h

07h

Not Use

5 x 8 dots

font pattern

01h

(09h)

08h

09h

:

0Eh

0Fh

Not Use

5 x 8 dots

font pattern

02h

(0Ah)

10h

11h

:

16h

17h

Not Use

5 x 8 dots

font pattern

03h

(0Bh)

18h

19h

:

1Eh

1Fh

Not Use

5 x 8 dots

font pattern

04h

(0Ch)

20h

21h

:

26h

27h

Not Use

5 x 8 dots

font pattern

05h

(0Dh)

28h

29h

:

2Eh

2Fh

Not Use

5 x 8 dots

font pattern

06h

(0Eh)

30h

31h

:

36h

37h

Not Use

5 x 8 dots

font pattern

07h

(0Fh)

38h

39h

:

3Eh

3Fh

Not Use

5 x 8 dots

font pattern

CGRAM Address Map