LM19264AFW
LCD Module User Manual
Prepared by:
Checked by:
Approved by:
K.C.
Date:
Date:
Date:
Rev. Descriptions
Release Date
0.1
Preliminary New release
2008-06-06
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Document Name: LM19264AFW-Manual-Rev0.1
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TOPWAY
LCD Module User Manual
LM19264AFW
Table of Content
1. Basic Specifications .............................................................................................................. 3
1.1
Display Specifications ............................................................................................................................................ 3
1.2
Mechanical Specifications ...................................................................................................................................... 3
1.3
Block Diagram ........................................................................................................................................................ 3
1.4
Terminal Functions ................................................................................................................................................. 4
2. Absolute Maximum Ratings .................................................................................................. 5
3. Electrical Characteristics ...................................................................................................... 5
3.1
DC Characteristics ................................................................................................................................................. 5
3.2
LED Backlight Circuit Characteristics ..................................................................................................................... 5
3.3
AC Characteristics ................................................................................................................................................. 6
4. Function Specifications ......................................................................................................... 7
4.1
Basic Setting .......................................................................................................................................................... 7
4.2
Adjusting the LCD display contrast ........................................................................................................................ 7
4.3
Resetting the LCD module ..................................................................................................................................... 7
4.4
Display Memory Map ............................................................................................................................................. 8
4.5
Internal Registers ................................................................................................................................................... 8
4.6
Display Control Instructions ................................................................................................................................... 9
5. Design and Handling Precaution ........................................................................................ 10
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Document Name: LM19264AFW-Manual-Rev0.1
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LCD Module User Manual
LM19264AFW
1. Basic Specifications
1.1 Display Specifications
1) LCD Display Mode
: STN, Negative, Transmissive
2) Display Color
: Display Data = “1” : Light Gray (*1)
: Display Data = “0” : Blue (*2)
3) Viewing Angle
: 6 H
4) Driving Method
: 1/64 duty, 1/9bias
5) Back Light
: White LED backlight
Note:
*1. Color tone may slightly change by Temperature and Driving Condition.
*2. The Color is defined as the inactive / background color
1.2 Mechanical Specifications
1) Outline Dimension
: 100.0 x 60.0 x 12.5MAX
(see attached Outline Drawing for details)
1.3 Block Diagram
BLA, BLK
LED Backlight Circuit
LCD Panel
192 x 64 pixels
VDD, VSS
Power
S6B0108
S6B0108
S6B0108
V0UT
Booster
or
or
or
V0
Circuit
equivalent
equivalent
equivalent
DB0 - DB7
RS, R/W, E, RSTB
CSA
CSB
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1.4 Terminal Functions
Pin
Pin
No. Name
I/O
Descriptions
1
DB7
I/O
Data bus;
:
:
:
Three state I/O terminal for display data or instruction data
8
DB0
I/O
9
E
Input In read mode
10
R/W
Input
R/W = H;
Data read form the LCD module,
data appears at DB0 – DB7 and can be read by the host
while, E = H and the device is being selected
In write mode
R/W = L;
Data write to the LCD module,
data appears at DB0 – DB7 will be written into the LCD module
at E = H  L and device is being selected
11
RS
Input RS = H; DB0 – DB7 = Display RAM data
RS = L; DB0 – DB7 = Instruction data
12
V0
Power LCD Contrast reference
13
VDD Power Positive Power Supply
14
VSS Power Negative Power Supply, Ground (0V)
15
CSA
Input Chip selection, enable access to each section of the LCD module
16
CSB
Input
CSB CSA
Function
0
0
Enable access to the Left Side (64 column)
of the LCD module
0
1
Enable access to the Middle Section (64 column)
of the LCD module
1
0
Enable access to the Right Side (64 column)
of the LCD module
1
1
Disable all the access to LCD module
17 VOUT Output Power Booster output for V0
18 RSTB Input Reset signal
RSTB = L,
Display off
display start line register becomes 0
no command or instruction data could be accepted
RSTB = H,
Normal running
19
BLA Power Positive Power for LED backlight
20
BLK Power Negative Power for LED backlight
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LM19264AFW
2. Absolute Maximum Ratings
Items
Symbol
Min.
Max.
Unit
Condition
Supply Voltage
V DD
0
7.0
V
V SS = 0V
Operating Temperature
T OP
-20
70
 C
No Condensation
Storage Temperature
T ST
-30
80
 C
No Condensation
Cautions:
Any Stresses exceeding the Absolute Maximum Ratings may cause substantial damage to the
device. Functional operation of this device at other conditions beyond those listed in the
specification is not implied and prolonged exposure to extreme conditions may affect device
reliability.
3. Electrical Characteristics
3.1 DC Characteristics
V SS =0V, V DD =5V, T OP =25  C
Items
Symbol
MIN.
TYP.
MAX.
Unit
Applicable Pin
Operating Voltage
V DD
4.8
5.0
5.2
V
VDD
Input High Voltage
V IH
3.5
-
V DD
V
RS, R/W, E, CSA, CSB,
Input Low Voltage
V IL
0
-
0.4
V
DB0-DB7
Operating Current
I DD
-
7.5
15
mA
VDD, VSS
3.2 LED Backlight Circuit Characteristics
BLK=0V, If BLA =102mA, T OP =25  C
Items
Symbol
MIN.
TYP.
MAX.
Unit
Applicable Pin
Forward Voltage
Vf BLA
-
5.0
-
V
BLA
Forward Current
If BLA
-
102
120
mA
BLA
Cautions:
Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.
BLA
BLK
No. of LED = 6pcs
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LM19264AFW
3.3 AC Characteristics
V SS =0V, V DD =5V, T OP =25  C
Item
Symbol
MIN.
TYP.
MAX.
Unit
E cycle time
tc
1500
-
-
ns
E high level width
twh
700
-
-
ns
E low level width
twl
700
-
-
ns
E rise time
tr
-
-
18
ns
E fall time
tf
-
-
18
ns
Address set-up time
tasu
210
-
-
ns
Address hold time
tah
15
-
-
ns
Data set-up time
tdsu
300
-
-
ns
Data delay time
td
-
-
480
ns
Data hold time (write)
tdhw
15
-
-
ns
Data hold time (read)
tdhr
30
-
-
ns
Host Write Timing Diagram
Host Read Timing Diagram
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4. Function Specifications
4.1 Basic Setting
To drive the LCD module correctly and provide normally display, please use the following setting
Display start line (Z address)= 0
LCD Display = on
Note:
These setting/commands should issue to both controllers while start up.
See the Display Control Instructions section for details.
4.2 Adjusting the LCD display contrast
A Variable-Resistor must be connected to the LCD module for providing a reference to V0.
Adjusting the VR will result the change of LCD display contrast.
The recommended value of VR is 25k to 50k
LCD module
VDD
V0
VR
VOUT
VSS
4.3 Resetting the LCD module
The LCD module should be initialized by setting RSTB terminal at low level when turning the power
on.
When RSTB pull low, the LCD module will:
- Display off
- Display start line register becomes 0. (Z-address=0)
While RSTB is low, no instruction can be accepted except status read. Therefore, execute other
instructions after making sure that DB4=0 (clear RSTB) and DB7=0 (ready) by status read
instruction. The conditions of power supply at initial power up are as follow:
Item
Symbol
MIN.
TYP.
MAX.
Unit
Reset time
trs
2.0
-
-
us
Rise time
tr
-
-
150
ns
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4.4 Display Memory Map
Page (X)
address
data
LCD Display (front view)
D0
0
:
D7
D0
1
:
D7
D0
2
:
D7
D0
3
:
D7
D0
4
:
192x64 pixels
D7
D0
5
:
D7
D0
6
:
D7
D0
7
:
D7
Column(Y) Address
00h  3Fh
00h  3Fh
00h  3Fh
Chip Select
CSA=0, CSB=0
CSA=1, CSB=0
CSA=0, CSB=1
Note:
1) Display star line (Z address) = 0
2) The Display Data store separately in three drivers.
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.
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LCD Module User Manual
LM19264AFW
4.6 Display Control Instructions
Code
Instructions
Function
Controls the display on or off. Internal status and display
Display on/off
0 0 0 0 1 1 1 1 1 1/0 data in RAM is not affected
0=off, 1=on
Set Column (Y)
0 0 0 1
Y address (0-63)
Set the Column address into the Y address counter
Address
Set Page (X)
X address
0 0 1 0 1 1 1
Set the Page address into the X address register
Address
(0-7)
Set Display Start
Z address
0 0 1 1
Indicates the display data RAM displayed at the top of the
Line (Z address)
(0-63)
screen
Read status
Busy=L, Driver ready; Busy=H, Driver busy
Status Read
0 1
0
0 0 0 0
on/off=L, Display is on; on/off=H, Display is off
Reset=L, Normal Running; Reset=H, reset
Write display data into display data RAM,
Write Display Data 1 0
Write data
After writing instruction, Y address counter increased by 1
automatically
Read Display Data 1 1
Read data
Read display data form the display data RAM
Note:
*1. For the details of the Display Control Instructions, please refer to Samsung S6B0108
handbook.
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LCD Module User Manual
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5. Design and Handling Precaution
Please refer to "LCD-Module-Design-Handling-Precaution.pdf".
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Document Name: LM19264AFW-Manual-Rev0.1
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