SSD1850 datasheet(32/56 Pages) ETC

32 / 56 page

SSD1850/51 Series

Rev 1.2

01/2003

SOLOMON

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 63/79. 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 63/79 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 5.

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 5.

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 for SSD1851 is set to 1/10 bias and SSD1850 is set to 1/9.

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.

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