Issue 04.2017
EA DOGM204-A
INCL. CONTROLLER SSD1803A FOR 4-/8-BIT, SPI AND I²C
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TECHNICAL DATA
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HIGH-CONTRAST LCD SUPERTWIST DISPLAY
OPTIONAL LED BACKLIGHT UNITS IN DIFFERENT COLORS
4x20 CHARACTER WITH 4.8 mm HEIGHT
SSD1803A CONTROLLER FOR 4-/8-BIT, SPI (2-/3-/4-WIRE) AND I²C (2-WIRE)
INTERFACE
SINGLE POWER SUPPLY +3.3V (typically 250µA)
NO ADDITIONAL VOLTAGES REQUIRED
OPERATING TEMPERATURE RANGE -20 THROUGH +70°C
LED BACKLIGHT 3 through 80mA@3.3V or 2 through 40mA@5V
NO MOUNTING REQUIRED, SIMPLY SOLDER INTO PCB
3 DIFFERENT CHARACTER SETS (CYRILLIC, ENGLISH-JAPANESE AND
EUROPEAN) INCLUDED IN THE SAME CONTROLLER
2 VIEWING DIRECTION POSSIBLE (BOTTOM AND TOP VIEW)
ORDERING CODE
LCD MODULE 4x20 - 4.8 mm
x: B
= blue background
W
= white background transfelctive
S
= black background
N
= white background reflective
EA DOGM204x-A
LED BACKLIGHT, WHITE
LED BACKLIGHT, AMBER
LED BACKLIGHT, GREEN/RED
USB TEST BOARD FOR PC (WINDOWS)
SOCKET CONNECTOR 4.8 mm HIGH (1x22-PIN, 2.54mm PITCH)
EA LED66X40-W
EA LED66X40-A
EA LED66X40-GR
EA 9780-3USB
EA FL-22P
EA DOGM204-A
EA DOG SERIES
With its EA DOG series, ELECTRONIC ASSEMBLY presents the world’s first display series which
will run on 3.3 V systems without auxiliary power.
Unlike normal LCD modules, you order the display and the corresponding backlight separately. This
gives you a wealth of possible combinations.
Designed for compact hand-held devices, this modern LCD range provides a number of real benefits
with or without backlight:
* extremely compact at 66 x 40 mm at the standard font size of 4.8 mm (4 x 10)
* ultra-flat at 2.0 mm without backlight or 5.8 mm including LED backlight
* 4-bit, 8-bit, SPI interface (2-/3-/4-wire) and I²C (2-wire)
* typical power consumption of only 250µA in full operation (LED white backlight as of 3mA)
* easy installation by simply soldering into the board
* A whole range of design variants can be supplied as of single units
* Changing background color
LED BACKLIGHTS
5 different variants are available for individual backlighting: white, yellow/green, red, amber and bi-
color.
Limiting resistor
For monochrome backlights, 2 separate LED
amber
Forward Current
EA LED66x40-A
voltage
max.
paths are available, which can be switched in
@ 3,3 V
@5V
parallel or in series to ideally match the system
Connected in parallel
2,1 V
72 mA
18 ohm
47 ohm
voltage. This means that all the backlights can
Connected in series
6,3 V
24 mA
-
-
be run either at 3.3 V and higher voltages.
Operation of the backlight requires an external
Limiting resistor
white
Forward Current
series resistor for current limiting. This can be
EA LED66x40-W
voltage
max.
@ 3,3 V
@5V
calculated by R=U/I; you will find the values in
Connected in parallel
3,2 V
90 mA
1,2 ohm
24 ohm
the table. To improve life time it is recommanded
to use a current source only.
Connected in series
9,6 V
30 mA
-
-
The operating life of the yellow/green, red and
amber backlights is 100,000 hours and that of
the white backlight is a bit shorter.
Limiting resistor
green/red
Forward
Current
Important: Never operate the backlight directly
EA LED66x40-GR
voltage
max.
@ 3,3 V
@5V
on a 5 V/3.3V supply, as this can immediately
red path (ARG/CR)
2,1 V
80 mA
24 ohm
48 ohm
destroy the LEDs!
INSTALLATION
First, the display and the corresponding backlight are clipped together. The complete unit is then
inserted into a PCB and soldered. Note that the 4 pins for the backlight must also be soldered from
the top with less tin.
Important: There are one or two protective films on the display (top and/or rear side) and one on
each backlight. Those have to be removed during or after production.
green path (ARG/CG)
2,1 V
80 mA
18 ohm
39 ohm
Page 2
Printing and typographical errors reserved.
ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.
EA DOGM204-A
4 DIFFERENT TECHNOLOGIES
As a standard we provide 4 different technologies as STN and FSTN:
display type
technology
optional
backlight
readability
display color
non
backlighted
display color
with
backlighted
recommende
backlight
color
FSTN pos.
transflective
it's fine with and
without backlight
readable even
without
backlight
black on white
black on backlight
color
white, blue, RGB
STN neg. blue
transmissive
usage only with
backlight
---
---
backlight color on
blue background
white,
yellow/green
FSTN neg.
transmissive
usage only with
backlight
---
---
backlight color on
black background
white, RGB
FSTN pos.
white
reflective
no backlight possible
finest readable
without
backlight
black on white
---
---
3 DIFFERENT BACKLIGHTS
3 different backlight colors are available to match equipments design as much as possible. The most
effective and brightest one is the white one EA LED66x40-W.
EA LED66x40-W
White
EA LED66x40-A
Amber
EA LED66x40-GR
Bi-color green and red
When you can see black and white pictures only here on this page then you're able to download a
coloured version from our website
http://www.lcd-module.de/eng/pdf/doma/dogm204e.pdf
USB-TEST BOARD EA 9780-3USB
For easy startup, a USB test board is available that can be connected to a PC. An USB cable and a
Windows software is supplied with the product. This allows individual text and to be displayed directly
on the connected display.
SIMULATION WITH WINDOWS
Without ordering a display, the simulator software may show all the displays and colors even without
the hardware. You can download for free from our website. There’s no need to install, it’s a simple
EXE file, also running from USB stick e.g.
http://www.lcd-module.de/deu/disk/startdog_V33.zip
Printing and typographical errors reserved.
ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.
Page 3
EA DOGM204-A
APPLICATION EXAMPLES
Different wiring must be used depending on the interface.
Note that the COG technology means that the current capacity of the outputs is limited. Therefore, a
large load on the bus may cause signal loops and unclean levels. If in doubt, additional pull-down
resistors (8051) are required or additional waits/NOPs must be incorporated.
Page 4
Printing and typographical errors reserved.
ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.
EA DOGM204-A
INITIALISATION EXAMPLES
Initialization Example 8-Bit, SPI and I2C
Command
Function Set
Extended function set
Entry mode set
Bias setting
Function Set
Internal OSC
Follower control
Power control
Contrast Set
Function Set
Display On
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Hex
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
0
0
0
1
0
1
0
1
1
0
1
0
0
1
1
1
0
1
1
1
0
1
1
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
0
1
1
1
1
0
1
0
1
0
0
1
1
0
1
0
0
1
Remark
$3A 8 bit data length extension Bit RE=1; REV=0
$09 4 line display
$06 bottom view
$1E BS1=1
$39 8 bit data length extension Bit RE=0; IS=1
$1B BS0=1 -> Bias=1/6
$6E Devider on and set value
$57 Booster on and set contrast (DB1=C5, DB0=C4)
$72 Set contrast (DB3-DB0=C3-C0)
$38 8 bit data length extension Bit RE=0; IS=0
$0F Display on, cursor on, blink on
Initialization Example 4-Bit
Command
Synchronize 1
Synchronize 2
Function Set
Extended funcion
set
Entry mode set
Bias setting
Function Set
Internal OSC
Follower control
Power control
Contrast Set
Function Set
Display on
RS R/W DB7 DB6 DB5 DB4 Hex
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
1
0
1
0
1
0
1
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
0
0
0
1
0
1
1
0
0
1
1
1
0
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
0
0
1
0
0
1
1
1
0
0
1
1
1
0
0
0
0
1
Remark
$33 Make sure to switch to 8 bit data length
$32 Switch to 4 bit data length
$2A 4 bit data length extension Bit RE=1; REV=0
$09 4 line display
$06 bottom view
$1E 4 bit data length extension Bit RE=0; IS=1
$29 4 bit data length extension Bit RE=0; IS=1
$1B 4 bit data length extension Bit RE=0; IS=1
$6E Devider on and set value
$57 Booster on and set contrast (DB1=C5, DB0=C4)
$72 Set contrast (DB3-DB0=C3-C0)
$28 4 bit data length extension Bit RE=0; IS=0
$0F Display on, cursor on, blink on
12:00 VIEWING ANGLE, TOP VIEW OPTION
6 o’clock (Bottom View)
If the display is read mostly from above (on the front of a laboratory power
supply unit, for example), the preferred angle of viewing can be set to 12
o’clock. This rotates the display by 180°. A slightly different initialization setup
is required for this.
SETTING THE CONTRAST
The contrast for the EA DOGM204-A can be set by command. This is done
using bits C0 through C5 in the commands "Contrast Set" and "Power/Icon
12 o’clock
(Top View)
Control/Contrast Set". Generally, the contrast is set once only. Thanks to the integrated temperature
compensation function it is kept constant allover the entire operating temperature range (-20 to
+70°C).
Contrast set (8-Bit)
Command
Function Set
Power control
Contrast Set
Function Set
RS
0
0
0
0
R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Hex
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
1
1
1
1
1
1
0
0
1
0
1
0
0
0
1
1
1
1
1
0
0
Remark
$39 8-Bit data length extension Bit RE=0; IS=1
$57 Booster on and set contrast (DB1=C5, DB0=C4)
$72 Set contrast (DB3-DB0=C3-C0)
$38 8-Bit data length extension Bit RE=0; IS=0
Further information about the commands of the SSD1803A, please refer to the datasheet:
http://www.lcd-module.de/fileadmin/eng/pdf/zubehoer/ssd1803a_2_0.pdf
Printing and typographical errors reserved.
ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.
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