SSD1805TR1 ETC2 [List of Unclassifed Manufacturers], SSD1805TR1 Datasheet - Page 34

• Manufacturer Part Number: SSD1805TR1
• Description: 132 x 68 STN LCD Segment / Common Monochrome Driver with Controller
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

9.28 Set 1/4 Bias Ratio
This command sets the bias ratio directly to 1/4. This bias ratio is especially designed for use in under 12
MUX display. In order to restore to other bias ratio, this command must be executed, with LSB=0, before the
“Set Multiplex ratio” or “Set LCD Bias” command is sent.
9.29 Set Icon Enabled
This command enables or disables the icon. It should be noticed that the default setting (POR) will enable the
icon.
9.30 Set Display Offset
This command should be sent ONLY when the multiplex ratio is set less than the default value.
When a lesser multiplex ratio is set, the display will be mapped in the top (y-direction) of the LCD, see the no
offset columns on Table 3 on Page 15. Use this command could move the display vertically within the 67
commons. To make the Reduced-MUX Com 0 (Com 0 after reducing the multiplex ratio) towards the Row 0
direction for L lines, the 7-bit data in second command should be given by L. An example for 8 line moving
towards to Com 0 direction is given on Table 12 on Page 35. To move in the other direction by L lines, the 8-
bit data should be given by 67-L. Please note that the display is confined within the default multiplex value.
9.31 Set Total Frame Phases
The total number of phases for one display frame is set by this command. The Static Icon is generated by the
overlapping of M and MSTAT signals. These two pins output either V
or V
at same frequency but with
SS
DD
phase different. To turn on the Static Icon, 3 phases overlapping is applied to these signals, while 1 phase
overlapping is given to the off status. The more the total number of phases in one frame, the less the
overlapping time. Thus the lower the effective driving voltage at the Static Icon on the LCD panel.
9.32 Status register Read
This command is issued by pulling
Low during a data read (refer to Figure 11 on Page 40 and Figure 13
D/ C
on Page 42 for parallel interface waveforms). It allows the MCU to monitor the internal status of the chip. No
status read is provided for serial mode.
Solomon Systech
Jun 2004 P 34/52
Rev 1.1
SSD1805 Series