S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 113

• Manufacturer Part Number: S1D13505
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
bits 4-2
bit 1
bit 0
REG[0Eh] bits 7-0
REG[0Fh] bits 1-0
Hardware Functional Specification
Issue Date: 01/02/02
Screen 1 Line Compare Register 0
REG[0Eh]
Screen 1 Line
Compare Bit 7
Screen 1 Line Compare Register 1
REG[0Fh]
n/a
Screen 1 Line
Compare Bit 6
n/a
Bit-per-pixel Select Bits [2:0]
Bit-per-pixel Select Bits [2:0]
These bits select the color depth (bpp) for the displayed data. See “Section 10.1 Display Mode For-
mats” for details of how the pixels are mapped into the image buffer.
CRT Enable
This bit enables the CRT monitor.
When this bit = 1, the CRT is enabled.
When this bit = 0, the CRT is disabled.
LCD Enable
This bit enables the LCD panel.
Programming this bit from a 0 to a 1 starts the LCD power-on sequence.
Programming this bit from a 1 to a 0 starts the LCD power-off sequence.
Screen 1 Line Compare Bits [9:0]
These bits are set to 1 during power-on.
The display can be split into two images: Screen 1 and Screen 2, with Screen 1 above Screen 2.
This 10-bit value specifies the height of Screen 1.
Height of Screen 1 (lines) = Screen 1 Line Compare Bits [9:0] + 1
If the height of Screen 1 is less than the display height then the remainder of the display is taken up
by Screen 2. For normal operation (no split screen) this register must be set greater than the Vertical
Display Height register (e.g. set to the reset value of 3FFh).
See “Display Configuration” for details.
Screen 1 Line
Compare Bit 5
n/a
110
000
001
010
011
100
101
–
111
Table 8-7: Bit-per-pixel Selection
Screen 1 Line
Compare Bit 4
n/a
Screen 1 Line
Compare Bit 3
n/a
Color Depth (bpp)
Screen 1 Line
Compare Bit 2
n/a
Reserved
15 bpp
16 bpp
1 bpp
2 bpp
4 bpp
8 bpp
Screen 1 Line
Compare Bit 1
Screen 1 Line
Compare Bit 9
Screen 1 Line
Compare Bit 0
Screen 1 Line
Compare Bit 8
X23A-A-001-14
S1D13505
Page 107
RW
RW