SSD1789A Solomon Systech, SSD1789A Datasheet - Page 42

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

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Example: In the Center screen scroll of 1/96 duty (display range: 96 lines = 24 blocks)
Description
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Figure 10 - GDDRAM updates for area scrolling
Solomon Systech
21
22
30
31
32
DDRAM:
0
1
2
Set Area Scroll
8 lines (block 0 and block 1) is specified for the top fixed area
8 lines (block 31 & block 32) are specified for the bottom fixed area
80 lines (block 2 to block 21) are specified the scroll area
36 lines (block 22 to block 30) are specified the background areas
Set area scroll mode – Center screen mode
Set Scroll start (Scroll range form 02H ~ 1EH)
Top block address =
Bottom block address
= Top block address + (number of lines in scroll area/4) – 1
= 2 + (80 / 4) –1
= 2 + 20 – 1 = 21
Number of specified block
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=
=
Number of lines in top fixed area / 4
8 / 4
2
= 32 – (number of lines in bottom fixed area / 4)
= 32 – (8 / 4)
= 32 – 2
= 30
Jul 2004
Fixed area
Scroll area
Background area
P 42/69 Rev 1.0
Command
AA Hex
ABH
24 blocks
= 96 line
Display area
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SSD1789A Series
00 Hex
02 Hex
Data
02 Hex
1E Hex
15 Hex
LCD panel
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