TOPWAY

LCD Module User Manual

LM19264BBC

www.topwaysz.com

Document Name: LM19264BBC-Manual-Rev0.1.doc

Page: 8 of 10

4.4

Display Memory Map

Page (X)

address

data

LCD Display (front view)

0

D0

:

D7

1

D0

:

D7

2

D0

:

D7

3

D0

:

D7

4

D0

:

D7

5

D0

:

D7

6

D0

:

D7

7

D0

:

D7

Column(Y) Address

00h

3Fh

00h

3Fh

00h

3Fh

Driver (accessed by)

/CS1

/CS2

/CS3

Note:

1) Display star line (Z address) = 0

2) The Display Data store separately in three drivers.

3) The Display Data for the left section could be accessed by /CS1.

The Display Data for the middle section could be accessed by /CS2.

The Display Data for the right section could be accessed by /CS3.

4.5

Internal Registers

There are three registers in each section of LCD module. Each of them could be controlled

independently.

Page (X) Address Register

X address register designates pages of the internal display data RAM. Count function is not

available. The address should set by instruction.

Column (Y) Address Counter

Y address counter designates address of the internal display data RAM. It could be set by

instruction and is increased by 1 automatically by read or write display data operations.

Display Start Line (Z) Register

Z address register indicates of display data RAM to LCD top line. It may be used for scrolling the

display pattern on the LCD.

192x64 pixels