SSD1859 Solomon Systech, SSD1859 Datasheet - Page 29

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

Set Contrast Control Register
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This command adjusts the contrast of the LCD panel by changing VOUT of the LCD drive voltage
provided by the On-Chip power circuits. VOUT is set with 64 steps (6-bit) contrast control register. It is a
compound commands:
Set Contrast Control Register
Contrast Level Data
Changes
No
Complete?
Yes
Figure 9 - Contrast Control Flow
Set Display Offset
The next command specifies the mapping of display start line (COM0 if display start line register equals
to 0) to one of ROW0-79. This command has no effect on ICONS. COM0 is mapped to ROW0 after
reset.
Set Multiplex Ratio
This command switches default 80 multiplex mode to any multiplex from 16 to 80, if Icon is disabled
(POR). When Icon is set enable, the corresponding multiplex ratio setting will be mapped to 17 to 81.
The chip pads ROW0-ROW79 will be switched to corresponding COM signal output.
Set Power Save Mode
This command forces the chip to enter Standby or Sleep Mode. LSB of the command will define which
mode will be entered.
Exit Power Save Mode
This command releases the chip from either Standby or Sleep Mode and return to normal operation.
Set N-line Inversion
Number of line inversion is set by this command for reducing crosstalk. 3 to 33-line inversion operations
could be selected. At POR, this operation is disabled.
It should be noted that the total number of mux (including the icon line) should NOT be a multiple of the
inversion number (N). Or else, some lines will not be changed their polarity during frame change.
Exit N-line Inversion
This command releases the chip from N-line inversion mode. The driving waveform will be inverted
once per frame after issuing this command.
Set DC-DC Converter Factor
Internal DC-DC converter factor is set by this command. 3X to 6X multiplying factors could be selected
using this command. Hardware configuration is used for 6X setup.
Set Icon Enable
This command enable/disable the Icon display.
Start Internal Oscillator
After POR, the internal oscillator is OFF. It should be turned ON by sending this command to the chip.
SSD1859
Rev 1.0
P 29/48 Dec 2003
Solomon Systech