SSD1809 Solomon Systech, SSD1809 Datasheet - Page 15

• Manufacturer Part Number: SSD1809
• Description: LCD SEGMENT / COMMON DRIVER
• Manufacturer: Solomon Systech

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SOLOMON
Display On (Display Mode)
This command starts the conversion of data in GDDRAM to necessary
waveforms on the Common and Segment driving outputs. The on-chip
bias generator is also turned on by this command. (Note : “ Oscillator
On” command should be sent before “ Display On” is selected)
Display Off (Stand-by Mode)
are as follow during display off :
1. The Common and Segment outputs are fixed at V
2. The Bias Voltage Generator is turned off.
3. The RAM and content of all registers are retained.
4. IC will accept new commands and data.
Set GDDRAM Column Address
The address can be set to location 00H-9FH (160 columns) and the
MSB is software set by “ set MSB of GDDRAM Column Address” . The
column address will be increased automatically after a read or write
operation.
GDDRAM Page Address” for further information.
Set GDDRAM Page Address
in GDDRAM. Refer to figure 5.
Save / Restore Column Address
Address of GDDRAM. Restore Column Address command restores the
copy obtained from the previous execution of saving column address.
This instruction is very useful for writing full graphics characters that are
larger than 8 pixels vertically.
Master Clear GDDRAM
zero. Issue this command followed by a dummy write data.
Master Clear Icon RAM
zero. Set the page pointer to icon page (page 9) and then issue this
command followed by a dummy write data.
Set Page Mask
Once the command “Set Page Mask” is issued, the next command will
be written to the Page Mask Register which is an 8-bit register. Each bit
represents one of the 8 pages: page mask bit 0 represents Page 1,
page mask bit 1 represents Page 2, ... etc.
Enable Page Mask
page mask bit set, will be cleared. Meanwhile, the data in the display
RAM is retained.
Enable Icon Mask
cleared. Meanwhile, the data in the icon display RAM is retained.
This command turns the LCD Common and Segment outputs on.
This command turns the display off and the states of the LCD driver
The Oscillator is not affected by this command.
This command positions the address pointer on a column location.
This command positions the row address to 1 of 9 possible positions
Save Column Address command saves a copy of the Column
This command is to clear the content of the Display Data RAM to
This command is used to clear the content of the Icon Data RAM to
This command is used to define the page which will be masked.
When the Page Mask is enabled, the display of those pages, with
When the Icon Mask is enabled, the display of the icons will be
Refer to “Address Increment Table” and command “Set
Command Description
SS
.
Set Logical Page Mask
page mask types 1) Physical page mask and 2)Logical page mask.
Physical mask refers to a physical location of the panel which cannot be
moved by scrolling, row remap or panel offset. Logical page mask
refers to the location of GDDRAM. Therefore a logical mask will keep
masking a definite area of GDDRAM content when the contain is
moved along the panel by scrolling, row remap or panel offset.
Set Display Mode
mode. In low power icon mode, only icons (driven by COM64) are dis-
played. The DC-DC converter, the voltage generator and the regulator
are disabled. All V
ply in the low power icon mode. Refer “Set Icon Mode” for further infor-
mation.
Set Icon Mode
mean-square value of 1xV
mean-square value of 0.87xV
mean-square value of 0.71xV
mean-square value of 0.58xV
Set Display Frequency
halved. Also, the operation frequency of analog circuitries will be halved
as well.
Set Frame Frequency
Fosc/(2 x Mux Ratio) to Fosc/(32 x Mux Ratio). When the “Frame Fre-
quency “ command is issued, the following command will be written to
the “Frame Frequency Register” which is used to define the desired
frame frequencies.
Set Bias Ratio
output. The selection should match the characteristic of LCD Panel.
Oscillator Enable
internal or external oscillator, this command should be executed. The
setting for this command is not affected by command “Set Display On/
Off”. See command “Ext/Int Oscillator” for more information
Ext / Int Oscillator
When internal oscillator is selected, feedback resistor between OSC1
and OSC2 is needed. For external oscillation circuit, feed clock input
signal to OSC2 and leave OSC1 open.
Voltage Generator Enable
generate the V
This command switches the driver to full display mode or icon display
This command is used to select one of 4 smart icon modes.
In smart icon mode A, on-pixels are stressed by a voltage with root-
In smart icon mode B, on-pixels are stressed by a voltage with root-
In smart icon mode C, on-pixels are stressed by a voltage with root-
In smart icon mode D, on-pixels are stressed by a voltage with root-
Remark: Icon Mode cannot be used if external divider is used.
This command sets the bias of 1:5, 1:7, 1:8 or 1:9 bias for the divider
This command is used to either turn on / off Oscillator. For using
This command is used to select either internal or external oscillator.
This command is used to enable the internal Voltage Generator to
This command is used to select the page mask type. There are two
This command is used to select one of 16 frame frequencies from
In half display frequency mode, the display frame frequency will be
CC
CC
from AV
, V
LL
s pins cannot have external bias voltage sup-
DD
DD
. Disable the voltage generator if external
DD
DD
DD
whereas off-pixels by 0.58xV
whereas off-pixels by 0.5xV
whereas off-pixels by 0.41xV
whereas off-pixels by 0.33xV
REV 1.3
03/02
DD
DD
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DD
DD
SSD1809
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