SSD1854U ETC [List of Unclassifed Manufacturers], SSD1854U Datasheet - Page 33

• Manufacturer Part Number: SSD1854U
• Description: LCD Segment / Common Driver with Controller CMOS
• Manufacturer: ETC [List of Unclassifed Manufacturers]

SSD1854
Series
8.9
8.10 Set LCD Bias [50~57]
8.11 Set Upper Window Corner (ax, ay) [60~61]
8.12 Set Lower Window Corner (bx, by) [62~63]
8.13 Set DC-DC Converter Factor [64~67]
8.14 Set Contrast Control Register [81]
8.15 Set Gray Scale Mode (White/Light Gray/Dark Gray/Black mode) [88~8F]
Set N-line Inversion [4C~4F]
Number of line inversion is set by this command for reducing crosstalk noise. 1 to 63-line
inversion operations could be selected. At POR, this operation is disabled.
This command selects a suitable bias ratio required for driving the particular LCD panel in use.
The POR default for SSD1854 is et to the optimization for 160 mux display mode.
These commands are used to define the upper left corner of the window for vertical scrolling.
After POR, these registers are set to (0, 0). The actual window position will be offset by the Set
Display Offset command.
These commands are used to define the lower right corner of the window for vertical scrolling.
After POR, these registers are set to (127, 159). These registers must be smaller than the
multiplex ration as defined by Set Multiplex Ratio.
Internal DC-DC converter factor is set by this command. For SSD1854, 3X to 5X multiplying
factors could be selected.
This command adjusts the contrast of the LCD panel by changing V
provided by the On-Chip power circuits. V
It is a compound commands:
Four gray scale modes – White, Light gray, Dark gray and Black – can be set. Each consists of
four registers namely A, B, C and D which correspond to four frames in FRC. Each of the 4-bits
in register A, B, C and D are used to define the width of PWM.
Rev 1.0
08/2002
Figure 7 - Contrast Control Flow Set Segment Re-map
Set Contrast Control Register
No
Contrast Level Data
Complete?
Changes
L7
Yes
is set with 64 steps (6-bit) contrast control register.
L7
of the LCD drive voltage
SOLOMON
28