SSD1815 datasheet(17/35 Pages) ETC

17 / 35 page

SOLOMON

SSD1815

REV 1.5

03/2000

Command Description

Set Lower Column Address

This command specifies the lower nibble of the 8-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.

Set Higher Column Address

This command specifies the higher nibble of the 8-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.

Set Internal Regulator Resistors Ratio

This command is to enable any one of the eight internal resis-

tor sets for different regulator gain when using internal regulator

resistor network (IRS pin pulled high). Please refer to Block Dia-

gram Description section for detail calculation of the LCD driv-

ing voltage.

Set Power Control Register

This command turns on/off the various power circuits associ-

ated with the chip.

Set Display Start Line

This command is to set Display Start Line register to deter-

mine starting address of display RAM to be displayed by select-

ing a value from 0 to 63. 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 are

assigned to Page 0 to 7.

Set Contrast Control Register

This commands adjusts the contrast of the LCD panel by

changing VL6 of the LCD drive voltage provided by the On-Chip

power circuits. VL6 is set with 64 steps (6-bit) contrast control

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 for exam-

ple.

Set LCD Bias

This command selects a suitable bias ratio (1/7 or 1/9)

required for driving the particular LCD panel in use. The POR

default for SSD1815 is set to 1/9 bias. For setting 1/4, 1/5, 1/6

and 1/8 bias, an extended compound command should be

Set Contrast Control Register

Contrast Level Data

Changes

Complete?

Yes

used.

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/reverse dis-

play. This command will be used with “Set Display Display

ON/OFF”command to form a compound command for enter-

ing power save mode. See “Set Power Save Mode”.

Set Normal/Reverse Display

This command sets the display to be either normal/

reverse. 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. In icon mode, the icon line is not reversed by this

command.

Set Display On/Off

This command alternatively turns the display on and off.

When display off is issued with entire display on, power save

mode will be entered. See “Set Power Save Mode” for

details.

Set Page Address

This command positions the page address from 0 to 8 pos-

sible positions in GDDRAM. Refer to Figure 5 for mapping.

Set COM Output Scan Direction

This command sets the scan direction of the COM output

allowing layout flexibility in LCD module assembly.

Set Read-Modify-Write Mode

This command puts the chip in read-modify-write mode in

which:

1. the column address is saved before entering the mode

2. the column address is incremented by display data write

but not by display data read

Software Reset

This command causes some of the internal status registers

of the chip to be initialized:

1. Static indicator is turned OFF

2. Display start line register is set to 0

3. Column address counter is set to 0

4. Page address is set to 0

5. Normal scan direction of the COM outputs

6. Contrast control register is set to 0

7. Test mode is turned OFF

Set End of Read-Modify-Write Mode

This command relieves the chip from read-modify-write

mode. The column address that is saved before entering

read-modify-write mode will be restored.

Set Indicator On/Off

This command turns on and off the static drive indicators. It

also controls whether standby mode or sleep mode will be

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