SSD1789A Solomon Systech, SSD1789A Datasheet - Page 40

• Manufacturer Part Number: SSD1789A
• Description: CSTN LCD Driver
• Manufacturer: Solomon Systech

www.DataSheet4U.com
C. Gray scale mode
Gray scale selection and corresponding data bus arrangement for different bus interface mode are illustrated in the
following table.
P31, P30
00
01
10
11
Table 12 - Data bus arrangement for different pixel and bus mode
9.5
This command is used to set the color look up table (LUT) for different pixel mode. The LUT has 32 6-bit
entries, the number of entry to write depends on different pixel mode, the 6 LSB of each of the data byte
following this command correspond to one entry of the LUT.
Pixel mode
18 or 16 bit/pixel
12 bit/pixel
8 bit/pixel
9.6
This command is used to select the duty ratio of the IC. All available driving duty can be selected using this
command. The driving duty can be changed from 1/32 to 1/132.
9.7
This command specifies the portion of screen for scrolling. The command sets the starting block address, finishing block
address, number of specific blocks and the area scroll mode of the area scrolling. Please be noted that the starting block
address should be smaller than the finishing block address.
The block address increment direction is started at 0
fixed area. Similarly, the block address decrement direction is started at the 41st block such that the GDDRAM address
corresponds to the bottom fixed area. The remaining block address excluding the top and the bottom fixed areas are
assigned to the scroll plus the background areas.
The set area scroll function is divided into four parts.
Solomon Systech
Set Display Control (CA Hex)
Set Area Scroll (AA Hex)
Set Color Look Up Table (CE Hex)
Gray Scale
selection
16-bit / pixel
8-bit / pixel
12-bit / pixel
18-bit / pixel
www.DataSheet4U.com
No. of entry
32
16
10
Bus interface
mode
(select by PS2-
PS0, ref to
Table 3 )
16 bit
8 bit
8 bit
16 bit
8 bit
16 bit
8 bit
Note
32 data byte (6 LSB of each) define the LUT
16 data byte (6 LSB of each) define the LUT
10 data byte (6 LSB of each) define the LUT with
1
Blue will use 1
correspondingly, and will use 9
01 and 10 correspondingly.
P34, P33
**
**
**
00
01
11
**
st
8 byte define all 8 colors of Red and Green, while
th
block such that the GDDRAM address corresponds to the top of the
Data bus arrangement
(D15……D0) for 16 bit bus mode,
(D7……D0) for 8 bit bus mode
( “*” denote don’t care bit )
RRRRRGGGGGGBBBBB
RRRRRGGG (byte 1)
GGGBBBBB (byte 2)
RRRGGGBB
RRRRGGGGBBBB****
RRRRGGGG (byte 1)
BBBBRRRR (byte 2)
GGGGBBBB (byte 3)
RRRRRR**GGGGGG** (word 1)
BBBBBB**RRRRRR** (word 2)
GGGGGG**BBBBBB** (word 3)
RRRRRR**GGGGGG** (word 1)
********BBBBBB** (word 2)
RRRRRR**GGGGGG** (word 1)
BBBBBB********** (word 2)
RRRRRR** (byte 1)
GGGGGG** (byte 2)
BBBBBB** (byte 3)
st
and 8
Jul 2004
th
byte for data 00, 11
th
P 40/69 Rev 1.0
and 10
th
byte for data
Note
1 word / 1 pixel
2 byte/ 1 pixel
1 byte / 1 pixel
1 word / 1 pixel
3 byte / 2 pixel
3 word / 2 pixel
2 word / 1 pixel
2 word / 1 pixel
3 byte / 1 pixel
www.DataSheet
www.DataSheet4U
www.DataSheet
www.DataSheet
SSD1789A Series
4U
4U.com
4U
.com
.com
.com