SSD1809T View Datasheet(PDF) - Solomon Systech

Part Name

Description

Manufacturer

SSD1809T

LCD Segment / Common Driver With Controller

Solomon Systech  

Vcc is provided.

Set 2X / 3X / 4X / 5X Converter

This command selects the usage of 2X / 3X / 4X / 5X Converter

when the internal voltage Generator is enabled.

Set DC/DC Converter Mode

This command sets the DC/DC converter to regulated mode. In regu-

lated mode, V CC voltage equals to V R voltage.

Voltage Regulator Enable

This command enables regulator which consists of the internal con-

trast control and temperature compensation circuits.

Internal Voltage Divider Enable

If the internal divider is disabled, external bias can be used for V LL6

to V LL2. If the internal divider is enabled, the internal circuit will gener-

ated the 1:5 / 1:7 / 1:8 / 1:9 bias driving voltage.

Internal Contrast Control Enable

This command is used to adjust the delta voltage of the bias volt-

ages. With bit option = 1, the software selection for delta bias voltage

control is enabled. With bit option = 0, internal contrast control is dis-

abled.

Increase / Decrease Contrast Level

If the internal contrast control is enabled, this command is used to

increase or decrease the contrast level within the 16 contrast levels.

Set Contrast Level

This command is used to select one of the 16 contrast levels from

10h to 1Fh when internal contrast control circuitry is in use.

Set Temperature Coefficient

This command can select 2 different LCD driving voltage tempera-

ture coefficients to match various liquid crystal temperature grades.

Those temperature coefficients are specified in Electrical Characteris-

tics Tables.

Set MUX Ratio / Chinese Character Mode (Partial Display)

This command is used to select the Graphic display mode with differ-

ent Mux from 2 Mux to 65 Mux or the Chinese character display mode

with different character line from 1 line to 3 lines. Figure 8a & 8b in the

section “Display Output Description” show the 65 Mux Graphic display

mode and 3-line Chinese character display mode respectively.

Set Row Re-Mapping

This instruction selects the mapping of Display Data RAM to Com-

mon drivers for mechanical flexibility. There are 2 mappings:

1. Row(0) - Row(Mux ratio-2) of GDDRAM mapped to COM(first dis-

play row location) - COM( first display row location+Mux ratio-2). Exam-

ple is illustrated in figure 8b, the first display row location is COM0 and

the Mux ratio is 53, then Row0 of GDDRAM wil be mapped to COM0,

Row1 through Row 51 of GDDRAM will be mapped to COM1 to

COM51.

2. Row(0) - Row(Mux ratio-2) of GDDRAM mapped to COM(first dis-

play row location+Mux ratio-2) - COM(first display row location). Exam-

ple is illustrated in figure 8c, Row0 - Row51 of GDDRAM is mapped to

COM51 - COM0.

Set Column Re-Mapping

This instruction selects the mapping of new Display Data RAM to

Segment drivers for mechanical flexibility. There are 2 mappings to

select:

1. Column 0 - Column 159 of GDDRAM mapped to SEG0-SEG159

respectively;

2. Column 0 - Column 159 of GDDRAM mapped to SEG159-SEG0

respectively.

Detailed information please refer to Figure 8d in the section “Display

Output Description”.

Set Vertical Scroll Value

In Graphic display mode, this command maps the selected

GDDRAM rows (00H-3FH) to COM pins. With scroll value equals to 0,

Row 0 of GDDRAM is mapped to COM0 and Row 1 through Row 63

are mapped to COM1 through COM63 respectively. With scroll value

equal to 1, Row 1 of GDDRAM is mapped to COM0, then Row 2

through Row 63 will be mapped to COM1 through COM62 respectively

and Row 0 will be mapped to COM63.

In Chinese character display mode, there are 73 rows of display con-

tent including space and icon. This command moves the display con-

tent downward equals to the value stored vertical scrolling register.

Set Display Rows Location

This command is used to define the first row location of the display,

the first row can be started at COM0 to COM63. Example is given in

Figure 8h.

SSD1809

16

REV1.3

03/02

SOLOMON

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