S1D13700F02 Epson Electronics America, Inc., S1D13700F02 Datasheet - Page 94

• Manufacturer Part Number: S1D13700F02
• Description: Embedded Memory Graphics Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 94
12.5.6 Horizontal Pixel Scrolling (HDOTSCR)
S1D13700F02
X42D-A-001-01
Case 1
Case 2
Where:
Where:
Line 2
Line 2
Line 1
Line 1
[CR] = 3
[TCR] = 5
[AP] = AP = 3
HDOTSCR = Disable
FPSHIFT = 3 CLK
[CR] = 4
[TCR] = 6
[AP] = AP = 3
HDOTSCR = Disable
FPSHIFT = 4 CLK
D
A
A
E
When enabling HDOTSCR (REG[1Bh] bits 2-0 > 0h), the C/R value should be increased
by 1 (C/R = C/R + 1) from an exact horizontal dimensional fit of the LCD display (exact
number of clocks for the display’s row drivers). For example, a display 40 characters wide
should have a C/R value of 41 characters, when HDOTSCR is enabled. Otherwise, a blank
character is retrieved (the next character is not displayed) and a blank space will be
displayed on the right column of the display.
The following use cases demonstrate some examples of horizontal pixel scrolling.
E
B
B
F
F
C
C
G
Figure 12-18 Horizontal Pixel Scrolling Use Cases
D
H
Revision 1.01
Case 3
Case 4
Where:
Where:
Line 2
Line 1
Line 2
Line 1
[CR] = 4
[TCR] = 6
[AP] = AP = 3
HDOTSCR = Enable
FPSHIFT = 3 CLK
[CR] = 4
[TCR] = 6
[AP] = AP = 4
HDOTSCR = Enable
FPSHIFT = 3 CLK
A
D
A
E
B
E
B
F
Epson Research and Development
Hardware Functional Specification
C
F
C
G
Vancouver Design Center
D
G
D
H
Issue Date: 2005/11/29