Page 92
Epson Research and Development
Vancouver Design Center
S1D13504
Hardware Functional Specification
X19A-A-002-19
Issue Date: 01/11/06
bits 6-0
Horizontal Display Width Bits [6:0]
These bits specify the LCD panel and/or the CRT horizontal display width as follows.
Contents of this Register = (Horizontal Display Width
÷
8) - 1
For passive LCD panels the Horizontal Display Width must be divisible by 16, and for TFT LCD
panels/CRTs the Horizontal Display Width must be divisible by 8. The maximum horizontal dis-
play width is 1024 pixels.
Note
This register must be programmed such that REG[04h]
≥
3 (32 pixels)
bits 4-0
Horizontal Non-Display Period Bits [4:0]
These bits specify the horizontal non-display period width in 8-pixel resolution as follows.
Contents of this Register = (Horizontal Non-Display Period
÷
8) - 1
The minimum value which should be programmed into this register is 3 (32 pixels). The maximum
value which can be programmed into this register is 1F, which gives a horizontal non-display period
width of 256 pixels.
Note
This register must be programmed such that
REG[05h]
≥
3 and (REG[05h] + 1)
≥
(REG[06h] + 1) + (REG[07h] bits [3:0] + 1)
bits 4-0
HRTC/FPLINE Start Position Bits [4:0]
For CRTs and TFTs, these bits specify the delay from the start of the horizontal non-display period
to the leading edge of the HRTC pulse and FPLINE pulse respectively.
Contents of this Register = (HRTC/FPLINE Start Position
÷
8) - 1
The maximum HRTC start delay is 256 pixels.
Note
This register must be programmed such that
(REG[05h] + 1)
≥
(REG[06h] + 1) + (REG[07h] bits [3:0] + 1)
Horizontal Display Width Register
REG[04h]
RW
n/a
Horizontal
Display Width
Bit 6
Horizontal
Display Width
Bit 5
Horizontal
Display Width
Bit 4
Horizontal
Display Width
Bit 3
Horizontal
Display Width
Bit 2
Horizontal
Display Width
Bit 1
Horizontal
Display Width
Bit 0
Horizontal Non-Display Period Register
REG[05h]
RW
n/a
n/a
n/a
Horizontal
Non-Display
Period Bit 4
Horizontal
Non-Display
Period Bit 3
Horizontal
Non-Display
Period Bit 2
Horizontal
Non-Display
Period Bit 1
Horizontal
Non-Display
Period Bit 0
HRTC/FPLINE Start Position Register
REG[06h]
RW
n/a
n/a
n/a
HRTC/
FPLINE Start
Position Bit 4
HRTC/
FPLINE Start
Position Bit 3
HRTC/
FPLINE Start
Position Bit 2
HRTC/
FPLINE Start
Position Bit 1
HRTC/
FPLINE Start
Position Bit 0