SSD1859 Solomon Systech, SSD1859 Datasheet - Page 27

• Manufacturer Part Number: SSD1859
• Description: 128 x 80 STN LCD Segment / Common 4 G/S Drive
• Manufacturer: Solomon Systech

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10. COMMAND DESCRIPTIONS
Set Display On/Off
This command turns the display on/off, by the value of the LSB.
Set Display Start Line
This command is to set Display Start Line register to determine starting address of display RAM to be
displayed by selecting a value from 0 to 79. With value equals to 0, D0 of Page 0 is mapped to COM0.
With value equals to 1, D1 of Page0 is mapped to COM0. The display start line values of 0 to 9 are
assigned to Page 0 to 9.
Set Page Address
This command positions the page address to 0 to 8/10 possible positions in GDDRAM. Refer to Figure
4. Set Higher Column Address This command specifies the higher nibble of the 7-bit column address of
the display data RAM. The column address will be incremented by each data access after it is pre-set
by the MCU and returning to 0 once overflow (>127).
Set Lower Column Address
This command specifies the lower nibble of the 7-bit column address of the display data RAM. The
column address will be incremented by each data access after it is pre-set by the MCU and returning to
0 once overflow (>127).
Set Segment Re-map
This commands changes the mapping between the display data column address and segment driver. It
allows flexibility in layout during LCD module assembly. Refer to Figure 4.
Set Normal/Inverse Display
This command sets the display to be either normal/inverse. In normal display, a RAM data of 1 indicates
an “ON” pixel. While in reverse display, a RAM data of 0 indicates an “ON” pixel. The icon line is not
affected by this command.
Set Entire Display On/Off
This command forces the entire display, including the icon row, to be “ON” regardless of the contents of
the display data RAM. This command has priority over normal/inverse display.
To execute this command, Set Display On command must be sent in advance.
Set LCD Bias
This command is used to select a suitable bias ratio (1/4 to 1/11) required for driving the particular LCD
panel in use. The POR default is set to 1/10 bias.
Software Reset
This command causes some of the internal status of the chip to be initialized:
1. Page address is set to 0
2. Column address is set to 0
3. Initial Display Line is set to 0 (point to display RAM page 0, D0)
4. Internal Resistor Ratio register is set to (0,0,0)
5. Software Contrast is set to 32
Set COM Output Scan Direction
This command sets the scan direction of the COM output allowing layout flexibility in LCD module
assembly.
Set Power Control Register
This command turns on/off the various power circuits associated with the chip.
SSD1859
Rev 1.0
P 27/48 Dec 2003
Solomon Systech